Datasets:

ibm-esa-geospatial
/

TerraMesh-Masks

sample_id string	dense_subtypes list	pyogrio_layer list	other_tags string	source string	area float64	sample_quality_mask float64	sample_quality_point float64	quality_reason string	class_label string	class_synonyms string	heuristic_keep_score float64	country string	continent string	ndvi_agreement float32	__key__ string	mask_uid string
193U_1044R_2_0	[ [ "natural", "wood" ] ]	[ "multipolygons" ]	['{}']	OSM	6,973,979.621374	0.9	0.5	The image shows a dense forested area with a polygon covering a large, contiguous region of woodland. The polygon is clearly visible with a transparent purple fill, and the proportional area is very high (99.99%), indicating a medium to large polygon size. The dense_subtypes ('natural', 'wood') are specific and match t...	tropical evergreen forest	['dense tropical woodland', 'southeast asian rainforest', 'closed-canopy forest', 'moist tropical forest']	0.747724	Thailand	South-Eastern Asia	0.742607	majortom_train_0000025	majortom_train_0000025_mask_0
193U_1044R_2_0	[ [ "land", "forest" ], [ "class", "wood" ] ]	[ "multipolygons" ]	[[]]	Overture	6,973,979.621374	0.95	0.9	The image clearly depicts a forested area with dense vegetation, consistent with the provided dense_subtypes ('land', 'forest') and ('class', 'wood'). The polygon covers a large, coherent region (proportional_area: 99.99%), with a transparent purple mask that is clearly visible and matches the expected geometry for a f...	tropical evergreen forest	['dense tropical woodland', 'southeast asian rainforest', 'closed-canopy forest', 'humid tropical forest']	0.782827	Thailand	South-Eastern Asia	0.742607	majortom_train_0000025	majortom_train_0000025_mask_1
600U_1033R_2_0	[ [ "natural", "peninsula" ] ]	[ "multipolygons" ]	['{"alt_name:cs": "Kam\\u010datsk\\u00fd poloostrov", "name:ca": "Pen\\u00ednsula de Kamtxatka", "name:cs": "Kam\\u010datka", "name:de": "Kamtschatka", "name:es": "Pen\\u00ednsula de Kamchatka", "name:eu": "Kamtxatka penintsula", "name:fi": "Kamt\\u0161atkan niemimaa", "name:fr": "Kamtchatka", "name:hr": "Kam\\u010datk...	OSM	6,973,599.021518	0.95	0.7	The image clearly depicts a natural peninsula, matching the dense_subtypes provided. The polygon is large, covering nearly the entire image (99.98% proportional area), with a well-defined transparent purple mask that is easily visible and coherent with the expected geometry of a peninsula. The resolution is sufficient ...	natural peninsula	['coastal land protrusion', 'narrow coastal headland', 'marine-adjacent landform', 'erosional coastal feature']	0.858571	Russia	Eastern Europe	0.506272	majortom_train_0000016	majortom_train_0000016_mask_0
600U_1033R_2_0	[ [ "water", "lake" ], [ "class", "lake" ] ]	[ "multipolygons", "multipolygons", "multipolygons" ]	[[], [], []]	Overture	29,222.01791	0.6	0.8	The image shows a clear water body (lake) with a well-defined polygon mask in purple. The polygon is small but resolvable at 10m resolution, with coherent geometry matching the 'lake' subtype. No contradictions to dense_subtypes are observed. The mask visibility is good, and the polygon size is appropriate for segmenta...	lake	['inland freshwater body', 'small natural lake', 'boreal lake', 'glacial lake']	0.716821	Russia	Eastern Europe	0.930857	majortom_train_0000016	majortom_train_0000016_mask_1
607U_224R_2_2	[ [ "natural", "wood" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons" ]	['{"leaf_type": "mixed"}', '{}', '{}', '{}', '{}', '{"leaf_type": "mixed"}', '{"leaf_type": "mixed"}', '{"leaf_type": "mixed"}']	OSM	3,599,058.736875	0.8	0.5	The image shows a clear and coherent polygon representing a wooded area, matching the dense_subtypes ('natural', 'wood'). The polygon is filled with transparent purple, making the mask visible and distinguishable. The proportional area of 51.6% indicates a medium to large polygon, suitable for segmentation training. No...	temperate deciduous woodland	['boreal mixed forest patch', 'dense temperate forest stand', 'Eastern European woodland', 'medium-sized forested area']	0.78327	Russia	Eastern Europe	0.988441	majortom_train_0000012	majortom_train_0000012_mask_0
145U_859R_0_1	[ [ "land_cover", "crop" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons" ]	[[], [], [], [], [], []]	Overture	6,968,621.722369	0.9	0.5	The image shows a clearly defined polygon covering a large, contiguous area of agricultural fields, consistent with the dense_subtypes ('land_cover', 'crop'). The mask visibility is excellent, with transparent purple clearly delineating the crop area. The polygon size is large, and the geometry matches the expected fil...	agricultural crop field	['irrigated cropland area', 'smallholder farm plot', 'seasonal agricultural land', 'cultivated arable land']	0.516278	India	Southern Asia	0.6	majortom_train_0000026	majortom_train_0000026_mask_0
145U_859R_0_1	[ [ "land_cover", "grass" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons" ]	[[], [], [], [], [], [], [], [], [], [], []]	Overture	2,610,286.948083	0.8	0.7	The image shows a medium-sized polygon with transparent purple fill, consistent with the dense_subtypes label of 'land_cover: grass'. The mask visibility is clear, with no contradictions to the provided subtype. The proportional area (37.42%) confirms a medium-sized polygon, suitable for segmentation training. The gras...	grassland	['open grassy area', 'rural grassland', 'agricultural grass cover', 'sparse vegetation grassland']	0.289525	India	Southern Asia	0.814088	majortom_train_0000026	majortom_train_0000026_mask_1
787U_315R_0_1	[ [ "natural", "water" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons" ]	['{"water": "river"}', '{}', '{}', '{}', '{}', '{}', '{}', '{}', '{}']	OSM	777,075.823597	0.9	0.8	The image shows a clear water body (likely a lake or pond) with a well-defined polygon mask in purple. The polygon size is medium (11.14% proportional area), and the mask visibility is excellent. The dense_subtypes ('natural', 'water') are specific and match the visual content without contradictions. The polygon cohere...	inland water body	['freshwater lake', 'small natural pond', 'boreal forest lake', 'shallow inland water']	0.712738	Russia	Eastern Europe	0.415101	majortom_train_0000010	majortom_train_0000010_mask_0
787U_315R_0_1	[ [ "water", "water" ], [ "class", "water" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons" ]	[[], [], [], [], [], [], [], []]	Overture	700,990.833212	0.9	0.8	The image shows a clear water body (likely a river or canal) with a well-defined polygon mask in purple. The polygon size is medium (proportional_area = 10.05%), and the mask visibility is excellent with no contradictions to the dense_subtypes ('water'). The geometry matches the expected filled area for water, and the ...	inland water body	['medium-sized river segment', 'freshwater canal', 'natural watercourse', 'permanent water feature']	0.752119	Russia	Eastern Europe	0.420121	majortom_train_0000010	majortom_train_0000010_mask_1
307U_800L_2_3	[ [ "natural", "wetland" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygo...	['{"wetland": "marsh"}', '{"wetland": "marsh"}', '{"wetland": "marsh"}', '{"wetland": "marsh"}', '{"wetland": "marsh"}', '{"wetland": "wet_meadow"}', '{"wetland": "marsh"}', '{"wetland": "marsh"}', '{"wetland": "wet_meadow"}', '{"wetland": "marsh"}', '{"wetland": "marsh"}', '{"wetland": "marsh"}', '{"wetland": "marsh"}...	OSM	4,825,111.3784	0.9	0.5	The image shows a wetland area with visible water bodies and vegetation, matching the dense_subtypes ('natural', 'wetland'). The polygon (purple mask) is large, covering a significant portion of the image (69.18%), and the mask visibility is clear. The polygon coherence is good, as wetlands typically form filled areas ...	inland freshwater wetland	['temperate marshland', 'shallow vegetated wetland', 'freshwater emergent wetland', 'lowland peat bog']	0.699083	United States of America	Northern America	0.55914	majortom_train_0000027	majortom_train_0000027_mask_0
761U_365L_0_0	[ [ "land", "wetland" ], [ "class", "wetland" ] ]	[ "multipolygons", "multipolygons" ]	[[], []]	Overture	438,013.645185	0.7	0.5	The polygon represents a wetland area, which aligns with the dense_subtypes provided. The mask is clearly visible and filled with transparent purple, covering a medium-sized area (6.28% proportional area). The polygon coherence is good, as wetlands typically form filled areas rather than linear features. The resolution...	boreal wetland	['northern peatland', 'inland freshwater marsh', 'forested wetland area', 'subarctic bog region']	1	Canada	Northern America	0.93281	majortom_train_0000024	majortom_train_0000024_mask_0
761U_365L_0_0	[ [ "water", "water" ], [ "class", "water" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygo...	[[], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], []]	Overture	2,373,321.829965	0.9	0.8	The image shows a clear water body with a well-defined polygon mask (purple). The polygon size is medium (proportional_area = 34.03%), and the mask visibility is excellent. The dense_subtypes ('water', 'water') are specific and coherent with the visual observation. No contradictions to the provided metadata are observe...	inland water body	['freshwater lake', 'boreal lake', 'medium-sized water reservoir', 'natural water surface']	0.770054	Canada	Northern America	0.754377	majortom_train_0000024	majortom_train_0000024_mask_1
406U_490R_1_3	[ [ "land_cover", "barren" ] ]	[ "multipolygons", "multipolygons" ]	[[], []]	Overture	6,719,520.424751	0.95	0.7	The image shows a large, clearly visible barren land area with a well-defined polygon (purple mask) covering a significant portion of the image. The polygon is coherent with the 'barren' land cover subtype, showing no contradictions. The proportional area is 96.34%, indicating a large polygon size, which is ideal for s...	barren land	['arid desert terrain', 'sparsely vegetated rocky land', 'dry wasteland area', 'unproductive sandy soil region']	0.336009	Iran	Southern Asia	0.174459	majortom_train_0000047	majortom_train_0000047_mask_0
406U_490R_1_3	[ [ "land_cover", "crop" ] ]	[ "multipolygons" ]	[[]]	Overture	375,755.516887	0.7	0.5	The polygon represents a medium-sized area (5.39% of the image) with a clear and coherent mask. The dense_subtypes indicate 'crop' land cover, which is visually consistent with the image—appearing as a distinct agricultural field in an arid region. The mask visibility is good, with no contradictions to the provided sub...	irrigated agricultural field	['small cultivated crop area', 'arid region farmland', 'irrigated crop parcel', 'semi-arid agricultural plot']	0.500146	Iran	Southern Asia	0.532612	majortom_train_0000047	majortom_train_0000047_mask_1
393D_1314R_2_0	[ [ "place", "hamlet" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons" ]	['{"postal_code": "2710", "ref:nswlpi:cadid": "108031048", "ref:psma:loc_pid": "NSW210", "wikidata": "Q50809605"}', '{"postal_code": "2710", "ref:nswlpi:cadid": "108031048", "ref:psma:loc_pid": "NSW210", "wikidata": "Q50809605"}', '{"postal_code": "2710", "ref:nswlpi:cadid": "108029891", "ref:psma:loc_pid": "NSW4168", ...	OSM	6,967,527.07719	0.8	0.9	The dense_subtypes indicate a 'hamlet', which is a small human settlement. The image shows a cluster of small structures and cleared areas, consistent with a rural hamlet. The polygon covers a medium-sized area (proportional_area 99.89%), and the purple mask is clearly visible and coherent, matching the expected geomet...	rural hamlet settlement	['small rural residential cluster', 'isolated human settlement', 'low-density rural village', 'agricultural hamlet area']	0.616479	Australia	Australia and New Zealand	0.377182	majortom_train_0000014	majortom_train_0000014_mask_0
252D_464L_0_3	[ [ "water", "river" ], [ "class", "river" ] ]	[ "multipolygons", "multipolygons", "multipolygons" ]	[[], [], []]	Overture	1,327.059665	0.6	0.8	The image clearly shows a river segment, matching the dense_subtypes ('water', 'river'). The polygon is small in proportional area (0.02%) but represents a meaningful linear feature (river) that is resolvable at 10m scale. The purple mask is visible and coherent with the river's geometry, though the polygon is narrow a...	river	['meandering freshwater river', 'tropical river channel', 'lowland river segment', 'inland watercourse']	0.69546	Brazil	South America	0.822419	majortom_train_0000013	majortom_train_0000013_mask_0
393D_1314R_2_0	[ [ "land_cover", "shrub" ] ]	[ "multipolygons" ]	[[]]	Overture	6,967,565.250362	0.9	0.5	The image shows a large, coherent region dominated by shrubland cover, consistent with the dense_subtypes label ('land_cover', 'shrub'). The polygon covers nearly the entire image (99.89% proportional area), with a clear transparent purple mask indicating a well-defined area. The shrubland texture and color are distinc...	shrubland	['dense arid shrub cover', 'semi-arid shrub vegetation', 'low woody shrubland', 'dryland shrub-dominated area']	0.227989	Australia	Australia and New Zealand	0.377182	majortom_train_0000014	majortom_train_0000014_mask_1
265U_1003L_1_0	[ [ "land_cover", "forest" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons" ]	[[], [], [], [], [], [], [], []]	Overture	6,972,520.077724	0.95	0.8	The image shows a clear and coherent polygon covering a large, contiguous forested area with no contradictions to the dense_subtypes ('land_cover', 'forest'). The mask visibility is excellent, with the transparent purple fill clearly delineating the forest region. The proportional area is very high (99.96%), indicating...	tropical forest land cover	['dense evergreen forest', 'tropical broadleaf forest', 'closed-canopy forest', 'primary forest land cover']	0.279892	Mexico	Central America	0.980374	majortom_train_0000021	majortom_train_0000021_mask_0
127U_1144R_2_3	[ [ "landuse", "industrial" ] ]	[ "multipolygons" ]	['{}']	OSM	56,787.642778	0.6	0.8	The image shows a clearly defined industrial area with distinct structures and features visible at the given resolution. The polygon, marked in purple, is coherent and matches the expected geometry for an industrial land use subtype. The proportional area (0.81%) is small but meaningful for segmentation, as the feature...	industrial land use	['manufacturing facility area', 'industrial complex', 'urban industrial zone', 'light industrial park']	0.577172	Cambodia	South-Eastern Asia	0.320535	majortom_train_0000003	majortom_train_0000003_mask_0
127U_1144R_2_3	[ [ "land_cover", "urban" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons" ]	[[], [], [], [], [], [], [], []]	Overture	1,137,228.304492	0.8	0.5	The image shows a clear urban area with a well-defined polygon marked in purple. The polygon covers a medium-sized area (16.3%) and aligns well with the dense_subtypes ('land_cover', 'urban'). The mask visibility is good, with no contradictions to the provided metadata. The polygon coherence is appropriate for an urban...	urban residential area	['dense urban settlement', 'built-up residential zone', 'compact urban neighborhood', 'low-rise urban housing area']	0.643935	Cambodia	South-Eastern Asia	0.597691	majortom_train_0000003	majortom_train_0000003_mask_1
611U_462L_2_1	[ [ "land_cover", "wetland" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons" ]	[[], [], [], [], [], [], [], [], []]	Overture	194,278.492707	0.6	0.5	The image shows a wetland area with a clearly visible purple mask outlining a coherent region. The polygon size is small (2.79% proportional area) but resolvable at 10m resolution, with no contradictions to the dense_subtypes ('land_cover', 'wetland'). The mask visibility is good, and the polygon geometry matches the e...	wetland	['boreal wetland', 'peatland', 'inland marsh', 'northern peat bog']	0.713955	Canada	Northern America	0.624697	majortom_train_0000004	majortom_train_0000004_mask_0
611U_462L_2_1	[ [ "water", "water" ], [ "class", "water" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygo...	[[], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], []]	Overture	589,885.300416	0.8	0.7	The image shows a clear water body with a well-defined polygon mask (purple). The polygon size is medium (proportional_area > 5%), and the mask visibility is good with no contradictions to the dense_subtypes ('water'). The geometry matches the expected filled area for water, and the resolution is appropriate for segmen...	inland water body	['freshwater lake', 'small natural lake', 'boreal lake', 'shallow water body']	0.752119	Canada	Northern America	0.545263	majortom_train_0000004	majortom_train_0000004_mask_1
223D_1532R_2_2	[ [ "land_cover", "forest" ] ]	[ "multipolygons", "multipolygons" ]	[[], []]	Overture	6,974,671.318525	0.9	0.5	The image shows a large, contiguous area with a clear and coherent polygon covering a forested region. The purple mask is well-defined and matches the expected geometry for a forest land cover type. The proportional area is 100%, indicating the polygon covers the entire image, which is ideal for segmentation training. ...	temperate forest	['dense eucalypt forest', 'Australian temperate woodland', 'closed-canopy forest', 'native sclerophyll forest']	0.282344	Australia	Australia and New Zealand	0.89534	majortom_train_0000038	majortom_train_0000038_mask_0
18D_892L_3_0	[ [ "land_cover", "crop" ] ]	[ "multipolygons", "multipolygons", "multipolygons" ]	[[], [], []]	Overture	2,290,063.746888	0.8	0.5	The image shows a polygon with a transparent purple fill, covering a medium-sized area (32.83% proportional area). The dense_subtypes indicate 'crop' under 'land_cover', which is visually consistent with the observed agricultural fields in the image. The mask visibility is clear, and the polygon geometry matches the ex...	agricultural crop field	['small-scale crop cultivation area', 'irrigated agricultural plot', 'tropical crop field', 'perennial crop plantation']	0.513976	Ecuador	South America	0.481779	majortom_train_0000028	majortom_train_0000028_mask_0
365D_182R_2_2	[ [ "water", "river" ], [ "class", "river" ] ]	[ "multipolygons" ]	[[]]	Overture	606.315722	0.6	0.8	The image clearly shows a linear feature consistent with a river, matching the dense_subtypes ('water', 'river'). The polygon is small in proportional area (0.01%) but represents a meaningful linear feature (river) that is resolvable at 10m scale. The purple mask is visible and coherent with the expected geometry of a ...	river	['perennial river channel', 'narrow watercourse', 'meandering fluvial feature', 'small ephemeral stream']	0.682835	South Africa	Southern Africa	0.501238	majortom_train_0000030	majortom_train_0000030_mask_0
343U_776R_1_2	[ [ "water", "lake" ], [ "class", "lake" ] ]	[ "multipolygons" ]	[[{'wikidata': 'Q628327'}]]	Overture	815,262.188899	0.8	0.9	The image shows a clear water body consistent with the 'lake' subtype. The polygon is medium-sized (proportional_area > 5%) and clearly visible with a well-defined transparent purple mask. The geometry matches the expected filled area for a lake, and there are no contradictions to the dense_subtypes. Mask visibility is...	lake	['inland water body', 'freshwater lake', 'natural lake', 'medium-sized lake']	0.745411	China	Eastern Asia	0.561058	majortom_train_0000031	majortom_train_0000031_mask_0
343U_776R_1_2	[ [ "water", "river" ], [ "class", "river" ] ]	[ "multipolygons" ]	[[]]	Overture	422.16655	0.6	0.3	The image clearly shows a linear feature consistent with a river, matching the dense_subtypes ('water', 'river'). The polygon is visible as a purple mask, though very narrow, which is expected for a river at this scale. The proportional area is very small (0.01%), but this is acceptable for linear features like rivers....	river	['narrow freshwater river', 'meandering river channel', 'small perennial river', 'inland watercourse']	0.685343	China	Eastern Asia	0.774047	majortom_train_0000031	majortom_train_0000031_mask_1
420U_788L_1_1	[ [ "landuse", "farmland" ] ]	[ "multipolygons", "multipolygons" ]	['{}', '{}']	OSM	161,932.063434	0.7	0.9	The image shows a clear polygon (purple mask) representing a distinct agricultural field within a larger vegetated area. The polygon is coherent with the 'farmland' subtype, exhibiting a filled area rather than a linear feature. The mask visibility is good, with no contradictions to the dense_subtypes. The proportional...	agricultural field	['cropland parcel', 'small farmland plot', 'irrigated agricultural field', 'rural cultivated area']	0.686582	United States of America	Northern America	0.563222	majortom_train_0000033	majortom_train_0000033_mask_0
420U_788L_1_1	[ [ "infrastructure", "transportation" ], [ "class", "crossing" ] ]	[ "multipolygons" ]	[[]]	Overture	0.019556	0.7	0.9	The image shows a clear transportation infrastructure element—a bridge crossing over water. The polygon (purple mask) accurately outlines the bridge structure, which is a linear feature consistent with the dense_subtypes ('infrastructure', 'transportation') and ('class', 'crossing'). The mask visibility is good, and th...	bridge crossing	['transportation bridge', 'road bridge over water', 'small river crossing infrastructure', 'elevated transportation link']	0.517204	United States of America	Northern America	1	majortom_train_0000033	majortom_train_0000033_mask_1
260U_797R_1_0	[ [ "water", "reservoir" ], [ "class", "reservoir" ] ]	[ "multipolygons" ]	[[]]	Overture	55,321.497313	0.5	0.9	The image shows a small, linear feature filled with transparent purple, consistent with the 'water' and 'reservoir' subtypes. The polygon is small but clearly visible, with a green marker indicating its location. The geometry matches the expected shape of a reservoir (elongated, filled area). No contradictions to dense...	reservoir	['small water storage reservoir', 'agricultural irrigation reservoir', 'inland artificial waterbody', 'rural water retention pond']	0.704258	India	Southern Asia	0.471356	majortom_train_0000035	majortom_train_0000035_mask_0
583U_457L_0_1	[ [ "land_cover", "forest" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons" ]	[[], [], [], [], [], [], []]	Overture	6,972,547.506152	0.9	0.7	The image clearly depicts a forested area, consistent with the dense_subtypes ('land_cover', 'forest'). The polygon covers a large proportional area (99.96%), is clearly visible, and the mask (transparent purple) is coherent with the expected geometry of a forest land cover. The resolution is appropriate for segmentati...	boreal forest	['dense coniferous forest', 'northern temperate forest', 'evergreen woodland', 'high-latitude forested area']	0.28297	Canada	Northern America	1	majortom_train_0000045	majortom_train_0000045_mask_0
583U_457L_0_1	[ [ "land_cover", "grass" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygo...	[[], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], []]	Overture	1,590,260.831538	0.8	0.6	The image shows a clear and coherent polygon with a transparent purple fill, matching the dense_subtypes label of 'grass' land cover. The polygon size is medium (22.8% proportional area), and the mask visibility is good with no contradictions to the provided subtypes. The geometry is consistent with a filled area of gr...	grassland	['temperate grassland area', 'open grass-covered terrain', 'natural pastureland', 'low-vegetation grass field']	0.291683	Canada	Northern America	0.737498	majortom_train_0000045	majortom_train_0000045_mask_1
376U_838R_3_1	[ [ "land_cover", "moss" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons" ]	[[], [], [], [], [], []]	Overture	3,024,063.31163	0.8	0.5	The image shows a clear and coherent polygon with a transparent purple fill, representing a medium-sized area (43.36% proportional area). The dense_subtypes indicate 'land_cover' with 'moss', which is visually consistent with the observed terrain—likely a mountainous or hilly region with sparse vegetation. The mask vis...	moss-covered mountainous land	['sparse alpine moss vegetation', 'rocky moss-dominated terrain', 'high-altitude moss land cover', 'barren mountainous moss area']	0.712006	China	Eastern Asia	0.584249	majortom_train_0000046	majortom_train_0000046_mask_0
603U_1027R_3_1	[ [ "natural", "peninsula" ] ]	[ "multipolygons" ]	['{"alt_name:cs": "Kam\\u010datsk\\u00fd poloostrov", "name:ca": "Pen\\u00ednsula de Kamtxatka", "name:cs": "Kam\\u010datka", "name:de": "Kamtschatka", "name:es": "Pen\\u00ednsula de Kamchatka", "name:eu": "Kamtxatka penintsula", "name:fi": "Kamt\\u0161atkan niemimaa", "name:fr": "Kamtchatka", "name:hr": "Kam\\u010datk...	OSM	6,973,878.558404	0.95	0.9	The image shows a clear and coherent polygon representing a natural peninsula, matching the dense_subtypes provided. The polygon is large, covering nearly the entire image (99.98% proportional area), with a well-defined transparent purple mask. The geometry aligns with the expected shape of a peninsula, and there are n...	natural peninsula	['coastal landform protrusion', 'geographical headland extension', 'marine-connected terrestrial cape', 'large natural promontory']	0.858571	Russia	Eastern Europe	0.557322	majortom_train_0000042	majortom_train_0000042_mask_0
603U_1027R_3_1	[ [ "water", "river" ], [ "class", "river" ] ]	[ "multipolygons" ]	[[]]	Overture	373.50199	0.6	0.8	The image clearly shows a linear feature consistent with a river, matching the dense_subtypes ('water', 'river'). The polygon is small in proportional area (0.01%) but represents a meaningful linear feature resolvable at 10m scale. The purple mask is visible and coherent with the expected geometry of a river. No contra...	river	['narrow freshwater river', 'meandering river channel', 'small perennial river', 'natural watercourse']	0.685343	Russia	Eastern Europe	0.6502	majortom_train_0000042	majortom_train_0000042_mask_1
430U_992L_1_0	[ [ "land_cover", "barren" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons" ]	[[], [], [], [], [], [], [], []]	Overture	4,336,508.096982	0.9	0.7	The image shows a clear, medium-sized polygon covering a barren land cover area, with no contradictions to the provided dense_subtypes. The purple mask is clearly visible and coherent with the expected geometry for barren land. The proportional area (62.17%) confirms the polygon is large and meaningful for segmentation...	barren land	['exposed soil area', 'unvegetated terrain', 'arid land surface', 'degraded land parcel']	0.335797	United States of America	Northern America	0.84539	majortom_train_0000043	majortom_train_0000043_mask_0
341U_1042R_2_2	[ [ "land_cover", "crop" ] ]	[ "multipolygons" ]	[[]]	Overture	669,379.015136	0.8	0.5	The image shows a clear and coherent polygon representing a crop field, matching the dense_subtypes ('land_cover', 'crop'). The purple mask is well-defined, with a transparent fill and clear boundaries. The proportional area (9.6%) indicates a medium-sized polygon, which is suitable for segmentation training. No contra...	agricultural crop field	['irrigated farmland parcel', 'small-scale cultivated land', 'terrace crop area', 'seasonal arable field']	0.513062	China	Eastern Asia	0.291961	majortom_train_0000051	majortom_train_0000051_mask_0
408U_661R_3_3	[ [ "land", "glacier" ], [ "class", "glacier" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons" ]	[[], [], [], [], []]	Overture	1,058,598.18469	0.8	0.9	The image clearly shows a glacier region in mountainous terrain, matching the dense_subtypes ('land', 'glacier') and ('class', 'glacier'). The purple mask is visible and coherent, covering a medium-sized area (15.18% proportional area). The polygon geometry aligns with the expected filled area of a glacier, and there a...	mountain glacier	['high-altitude ice field', 'alpine glacier accumulation zone', 'rocky mountain glacier', 'persistent snow and ice cover']	1	Pakistan	Southern Asia	0.669101	majortom_train_0000052	majortom_train_0000052_mask_0
408U_661R_3_3	[ [ "land_cover", "snow" ] ]	[ "multipolygons", "multipolygons" ]	[[], []]	Overture	4,503,474.979928	0.9	0.9	The image shows a mountainous region with a polygon covering a significant portion of the area, consistent with the dense_subtypes label of 'snow' under 'land_cover'. The polygon is clearly visible, filled with transparent purple, and covers a medium to large area (64.57% proportional area). The snow cover is distinct ...	permanent snow cover	['high-altitude snowpack', 'glaciated mountain snow', 'persistent alpine snow', 'seasonal snow accumulation']	0.767521	Pakistan	Southern Asia	0.871751	majortom_train_0000052	majortom_train_0000052_mask_1
536U_432L_3_2	[ [ "place", "island" ] ]	[ "multipolygons" ]	['{"alt_name:cs": "Nov\\u00fd Foundland", "name:ar": "\\u0646\\u064a\\u0648\\u0641\\u0627\\u0648\\u0646\\u062f\\u0644\\u0627\\u0646\\u062f", "name:be": "\\u0412\\u043e\\u0441\\u0442\\u0440\\u0430\\u045e \\u041d\\u044c\\u044e\\u0444\\u0430\\u045e\\u043d\\u0434\\u043b\\u0435\\u043d\\u0434", "name:bg": "\\u041d\\u044e\\u0...	OSM	6,974,194.649531	0.95	0.8	The image clearly depicts an island, matching the dense_subtypes ('place', 'island'). The polygon covers a large, coherent area (proportional_area: 99.99%), with a well-defined transparent purple mask visible throughout. The geometry aligns with the expected shape of an island, and there are no contradictions to the pr...	island	['large coastal island', 'boreal forest island', 'remote northern island', 'lake island']	0.824137	Canada	Northern America	1	majortom_train_0000058	majortom_train_0000058_mask_0
536U_432L_3_2	[ [ "land", "land" ], [ "class", "island" ] ]	[ "multipolygons" ]	[[{'wikidata': 'Q48335'}]]	Overture	6,974,194.649531	0.95	0.8	The dense_subtypes indicate 'island', which is a specific and meaningful Earth Observation concept. The polygon covers a large, clearly visible area (proportional_area: 99.99%) with coherent geometry matching the expected shape of an island. The mask visibility is excellent, with no contradictions to the provided subty...	island	['coastal island', 'large landmass surrounded by water', 'remote boreal island', 'freshwater island']	1	Canada	Northern America	1	majortom_train_0000058	majortom_train_0000058_mask_1
521U_400R_1_3	[ [ "natural", "coastline" ] ]	[ "multipolygons" ]	['{}']	OSM	2,200,044.286595	0.8	0.5	The image shows a clear coastline with a well-defined polygon mask. The polygon size is medium (proportional_area > 5%), and the mask visibility is good, with no contradictions to the dense_subtypes ('natural', 'coastline'). The geometry matches the expected linear feature of a coastline, and the mask is coherent and c...	natural coastline	['coastal boundary', 'shoreline edge', 'marine-terrestrial interface', 'tidal boundary line']	0.674386	null	null	0.553647	majortom_train_0000050	majortom_train_0000050_mask_0
392D_537L_0_3	[ [ "water", "river" ], [ "class", "river" ] ]	[ "multipolygons" ]	[[]]	Overture	601.689421	0.5	0.9	The image shows a clear linear feature consistent with the 'river' subtype from dense_subtypes. The polygon (purple mask) accurately follows the visible river segment, with no contradictions to the provided metadata. The proportional area is very small (0.01%), but this is acceptable for linear features like rivers. Th...	river	['narrow meandering river', 'agricultural drainage channel', 'small perennial river', 'lowland watercourse']	0.685343	Argentina	South America	0.935947	majortom_train_0000048	majortom_train_0000048_mask_0
521U_400R_1_3	[ [ "water", "ocean" ], [ "class", "ocean" ] ]	[ "multipolygons" ]	[[]]	Overture	4,773,280.515644	0.95	0.8	The image shows a clear and coherent polygon representing a water body, consistent with the dense_subtypes ('water', 'ocean'). The polygon is large, covering 68.43% of the image, with excellent visibility and no contradictions to the provided subtypes. The mask is well-defined and suitable for segmentation training. Th...	ocean water	['coastal ocean waters', 'open sea surface', 'marine water body', 'large saline water area']	0.828749	null	null	0.547778	majortom_train_0000050	majortom_train_0000050_mask_1
112U_749L_0_1	[ [ "land_cover", "forest" ] ]	[ "multipolygons", "multipolygons" ]	[[], []]	Overture	6,974,271.614556	0.95	0.7	The image shows a dense forest area with a polygon covering nearly the entire image (99.99% proportional area). The polygon is coherent with the dense_subtypes ('land_cover', 'forest'), and the mask visibility is excellent with a clear transparent purple fill. The polygon size is large, and there are no contradictions ...	tropical dense forest	['evergreen broadleaf forest', 'primary tropical rainforest', 'dense vegetation cover', 'closed-canopy forest']	0.279267	Venezuela	South America	0.667748	majortom_train_0000061	majortom_train_0000061_mask_0
112U_749L_0_1	[ [ "land_cover", "shrub" ] ]	[ "multipolygons", "multipolygons" ]	[[], []]	Overture	28,405.159948	0.6	0.8	The polygon represents a small area (0.41% of the image) with a dense_subtype of 'shrub' land cover. The purple mask is clearly visible and coherent, covering a compact region of vegetation that matches the expected geometry for shrubland. The resolution is sufficient to distinguish the shrub cover from surrounding fea...	shrubland	['dense shrub vegetation', 'low woody vegetation cover', 'tropical shrub area', 'secondary shrub growth']	0.184606	Venezuela	South America	0.968452	majortom_train_0000061	majortom_train_0000061_mask_1
424U_859L_1_0	[ [ "infrastructure", "utility" ], [ "class", "pipeline" ] ]	[ "multipolygons" ]	[[]]	Overture	637.384311	0.5	0.9	The image shows a small, linear feature consistent with a pipeline. The purple mask (appearing as a thin line) aligns with the expected geometry for a utility pipeline. The proportional area is very small (0.01%), but this is acceptable for linear infrastructure. The mask visibility is clear, though the feature is narr...	utility pipeline	['underground oil pipeline', 'buried gas transmission line', 'linear utility corridor', 'narrow energy transport infrastructure']	0.530214	United States of America	Northern America	0.869063	majortom_train_0000062	majortom_train_0000062_mask_0
424U_859L_1_0	[ [ "land_use", "agriculture" ], [ "class", "farmland" ] ]	[ "multipolygons" ]	[[]]	Overture	56,107.824115	0.6	0.5	The polygon represents a small agricultural field, clearly visible and coherent with the dense_subtypes ('agriculture', 'farmland'). The mask visibility is good, with a distinct transparent purple fill inside the polygon. The proportional area (0.8%) is small but meaningful for segmentation training at 10m resolution, ...	small agricultural field	['irrigated cropland parcel', 'rectangular farm plot', 'peripheral agricultural land', 'small-scale cultivated field']	1	United States of America	Northern America	0.369792	majortom_train_0000062	majortom_train_0000062_mask_1
606U_651L_3_0	[ [ "natural", "wetland" ] ]	[ "multipolygons" ]	['{}']	OSM	5,391,990.385026	0.95	0.9	The image shows a clear and coherent polygon representing a natural wetland area, with a transparent purple mask that is easily distinguishable from the surrounding terrain. The polygon size is large (proportional_area = 77.3%), and the geometry matches the expected characteristics of a wetland, which typically occupie...	boreal wetland	['northern peatland', 'forested wetland area', 'subarctic marshland', 'inland freshwater wetland']	0.764405	Canada	Northern America	0.642977	majortom_train_0000066	majortom_train_0000066_mask_0
606U_651L_3_0	[ [ "natural", "wood" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons" ]	['{}', '{}', '{}', '{}', '{}']	OSM	2,944,289.335579	0.7	0.5	The image shows a clear and coherent polygon representing a wooded area, consistent with the dense_subtypes ('natural', 'wood'). The polygon is medium-sized (proportional_area > 5%) and the mask visibility is good, with a well-defined transparent purple fill. The geometry matches the expected subtype (filled area, not ...	temperate boreal woodland	['northern coniferous forest patch', 'dense mixed boreal woodlot', 'small temperate forest stand', 'boreal woodland area']	0.78327	Canada	Northern America	0.45866	majortom_train_0000066	majortom_train_0000066_mask_1
190D_1370R_1_1	[ [ "land_cover", "shrub" ] ]	[ "multipolygons" ]	[[]]	Overture	6,975,046.525077	0.8	0.5	The image shows a dense distribution of shrubland cover, consistent with the provided dense_subtypes ('land_cover', 'shrub'). The polygon covers the entire image (proportional_area: 100%), indicating a medium to large region. The red mask (transparent purple overlay) is clearly visible and coherent with the expected ge...	shrubland	['dense woody shrub cover', 'arid region shrub vegetation', 'sparse to dense shrubland', 'natural shrub-dominated land cover']	0.218628	Australia	Australia and New Zealand	0.783157	majortom_train_0000067	majortom_train_0000067_mask_0
156U_140R_0_2	[ [ "land_use", "residential" ], [ "class", "residential" ] ]	[ "multipolygons", "multipolygons" ]	[[], []]	Overture	435,298.12581	0.6	0.7	The polygon represents a small to medium-sized area (6.24%) with a clear residential land use subtype. The mask visibility is reasonable, with a distinct purple overlay indicating a coherent residential region. No contradictions to dense_subtypes are observed, and the polygon geometry matches the expected filled area f...	residential area	['rural residential settlement', 'low-density housing area', 'small village settlement', 'sparsely built residential zone']	1	Niger	Western Africa	0.398795	majortom_train_0000068	majortom_train_0000068_mask_0
608U_1008R_1_2	[ [ "natural", "peninsula" ] ]	[ "multipolygons" ]	['{"alt_name:cs": "Kam\\u010datsk\\u00fd poloostrov", "name:ca": "Pen\\u00ednsula de Kamtxatka", "name:cs": "Kam\\u010datka", "name:de": "Kamtschatka", "name:es": "Pen\\u00ednsula de Kamchatka", "name:eu": "Kamtxatka penintsula", "name:fi": "Kamt\\u0161atkan niemimaa", "name:fr": "Kamtchatka", "name:hr": "Kam\\u010datk...	OSM	6,970,363.644555	0.9	0.5	The image shows a clear, dense natural peninsula with a well-defined polygon covering a large, coherent area. The purple mask is highly visible and matches the expected geometry for a peninsula. No contradictions to dense_subtypes are observed. The proportional area is very large, indicating a medium to large polygon s...	natural peninsula	['coastal landform protrusion', 'forested coastal peninsula', 'large natural headland', 'boreal peninsula region']	0.855911	Russia	Eastern Europe	0.613443	majortom_train_0000057	majortom_train_0000057_mask_0
735U_418L_0_1	[ [ "land_cover", "grass" ] ]	[ "multipolygons" ]	[[]]	Overture	6,975,033.331984	0.9	0.5	The image shows a clear and coherent region of grassland cover, matching the dense_subtypes ('land_cover', 'grass'). The polygon is large and fills the entire image, with no contradictions to the provided metadata. The purple mask is clearly visible and covers a meaningful area for segmentation training. The resolution...	grassland	['temperate grassland', 'open grassy plain', 'natural pastureland', 'low vegetation grass cover']	0.282289	Canada	Northern America	0.541734	majortom_train_0000054	majortom_train_0000054_mask_0
735U_418L_0_1	[ [ "land_cover", "moss" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons" ]	[[], [], [], [], []]	Overture	3,258,534.627085	0.8	0.5	The image shows a clear and coherent polygon representing a land cover type consistent with 'moss' as indicated in dense_subtypes. The purple mask is well-defined and covers a medium-sized area (46.72% proportional area), making it suitable for segmentation training. The polygon geometry matches the expected filled are...	moss-dominated land cover	['peatland moss vegetation', 'boreal moss ground cover', 'wetland moss area', 'northern peat moss habitat']	0.726884	Canada	Northern America	0.810456	majortom_train_0000054	majortom_train_0000054_mask_1
348D_1249R_3_1	[ [ "land", "desert" ], [ "class", "desert" ] ]	[ "multipolygons" ]	[[{'wikidata': 'Q783129'}]]	Overture	6,966,662.683109	0.9	0.5	The image clearly depicts a desert landscape, consistent with the provided dense_subtypes ('land', 'desert') and ('class', 'desert'). The polygon covers a large proportional area (99.88%) and is coherent with the expected geometry for a desert region. The purple mask is clearly visible and fills the entire image, indic...	arid desert land	['sandy desert terrain', 'barren desert landscape', 'dry desert region', 'open desert expanse']	1	Australia	Australia and New Zealand	0.24247	majortom_train_0000055	majortom_train_0000055_mask_0
348D_1249R_3_1	[ [ "land_cover", "shrub" ] ]	[ "multipolygons" ]	[[]]	Overture	6,966,662.683109	0.95	0.8	The image shows a homogeneous land cover consistent with shrubland, as indicated by the dense_subtypes. The polygon covers a large, contiguous area (proportional_area: 99.88%), with clear visibility of the transparent purple mask. The geometry matches the expected filled area for shrubland, and there are no contradicti...	shrubland	['dense arid shrub vegetation', 'semi-arid shrub cover', 'low woody shrubland', 'dryland shrub-dominated area']	0.221283	Australia	Australia and New Zealand	0.24247	majortom_train_0000055	majortom_train_0000055_mask_1
218U_1148R_1_1	[ [ "place", "island" ] ]	[ "multipolygons" ]	['{"name:be": "\\u0412\\u043e\\u0441\\u0442\\u0440\\u0430\\u045e \\u0425\\u0430\\u0439\\u043d\\u0430\\u043d\\u044c", "name:cs": "Chaj-nan", "name:de": "Hainan", "name:eo": "Insulo Hajnano", "name:et": "Hainan", "name:fr": "Hainan", "name:hr": "Hainan", "name:ia": "Insula Hainan", "name:ja": "\\u6d77\\u5357\\u5cf6", "na...	OSM	6,970,817.339886	0.95	0.7	The image clearly shows an island, matching the dense_subtypes ('place', 'island'). The polygon is large, covering nearly the entire image (99.94% proportional area), with a well-defined transparent purple mask that accurately represents the island's shape. The polygon coherence is excellent, as the geometry aligns per...	island	['coastal island', 'large vegetated island', 'riverine island', 'inland island in fluvial system']	0.816092	China	Eastern Asia	0.707405	majortom_train_0000080	majortom_train_0000080_mask_0
218U_1148R_1_1	[ [ "infrastructure", "power" ], [ "class", "power_tower" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons" ]	[[], [], [], []]	Overture	0.092889	0.5	0.9	The image shows a linear feature with green circle markers indicating specific points along the structure, consistent with power infrastructure. The polygon (purple) aligns with a narrow, elongated structure, likely a power line corridor or transmission line. The dense_subtypes ('infrastructure', 'power') and ('class',...	power transmission tower	['electricity pylon', 'high-voltage tower', 'overhead power line support', 'utility tower']	1	China	Eastern Asia	1	majortom_train_0000080	majortom_train_0000080_mask_1
470U_168R_2_0	[ [ "land_use", "agriculture" ], [ "class", "farmyard" ] ]	[ "multipolygons" ]	[[]]	Overture	4,175.215717	0.6	0.5	The polygon represents a small agricultural area, likely a farmyard, as indicated by the dense_subtypes. The purple mask is clearly visible and coherent, covering a small but distinct region. The proportional area (0.06%) is below the 0.5% threshold for 'small' but is meaningful for agricultural land use at this scale....	small agricultural farmyard	['rural farmstead area', 'small cultivated farmland patch', 'isolated agricultural enclosure', 'compact farmyard plot']	1	Kosovo	Southern Europe	0.6	majortom_train_0000074	majortom_train_0000074_mask_0
627U_802L_0_1	[ [ "natural", "water" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons" ]	['{"water": "river"}', '{"water": "river"}', '{}', '{}', '{}', '{"water": "river"}', '{}']	OSM	375,041.636313	0.9	0.8	The image shows a clear water body with a well-defined polygon mask (purple) covering a medium-sized area (proportional_area = 5.38%). The dense_subtypes indicate 'natural water', which matches the visual observation. The polygon coherence is good, with a filled area that aligns with the expected geometry for water bod...	inland water body	['boreal lake', 'small freshwater lake', 'northern Canadian lake', 'natural water reservoir']	0.695235	Canada	Northern America	0.584989	majortom_train_0000070	majortom_train_0000070_mask_0
627U_802L_0_1	[ [ "natural", "wetland" ] ]	[ "multipolygons", "multipolygons", "multipolygons" ]	['{}', '{}', '{}']	OSM	258,589.971008	0.6	0.5	The image shows a wetland area with a purple polygon mask covering a small, coherent region. The polygon is clearly visible and matches the expected geometry for a wetland subtype. The proportional area is small (3.71%), but the feature is resolvable at 10m scale and meaningful for segmentation training. The mask visib...	boreal wetland	['peatland wetland', 'northern peat bog', 'inland freshwater wetland', 'forested wetland area']	0.73591	Canada	Northern America	0.654026	majortom_train_0000070	majortom_train_0000070_mask_1
48D_516L_0_0	[ [ "land_cover", "shrub" ] ]	[ "multipolygons" ]	[[]]	Overture	5,101,235.272471	0.9	0.7	The image shows a clear and coherent polygon representing a dense shrubland area, with no contradictions to the provided dense_subtypes. The polygon is large (proportional_area > 70%) and the mask visibility is excellent, with transparent purple clearly delineating the shrub-covered region. The geometry matches the exp...	shrubland	['dense woody shrub vegetation', 'tropical shrub-dominated land cover', 'closed shrub canopy area', 'secondary shrub growth']	0.222398	Brazil	South America	0.659344	majortom_train_0000069	majortom_train_0000069_mask_0
467U_1050R_2_0	[ [ "land_cover", "forest" ] ]	[ "multipolygons", "multipolygons", "multipolygons" ]	[[], [], []]	Overture	6,969,872.547007	0.9	0.5	The image clearly depicts a forested area, consistent with the provided dense_subtypes ('land_cover', 'forest'). The polygon covers a large proportional area (99.93%), making it a medium-to-large region. The purple mask is clearly visible and coherent, filling the entire forested area without contradictions. The geomet...	temperate deciduous forest	['dense broadleaf forest', 'mixed temperate woodland', 'closed-canopy forest', 'montane deciduous forest']	0.281287	China	Eastern Asia	1	majortom_train_0000071	majortom_train_0000071_mask_0
510U_560L_3_0	[ [ "land_cover", "urban" ] ]	[ "multipolygons" ]	[[]]	Overture	133,309.197018	0.6	0.9	The polygon represents a small, linear feature with a proportional area of 1.91%, which is below the 5% threshold for 'medium' size but above the 0.5% threshold for 'small'. The purple mask is clearly visible and coherent, matching the expected geometry for an urban land cover subtype. The feature appears to be a road ...	highway	['major road', 'paved transportation corridor', 'urban arterial road', 'multi-lane highway']	0.57836	Canada	Northern America	0.493814	majortom_train_0000063	majortom_train_0000063_mask_0
510U_560L_3_0	[ [ "land_use", "agriculture" ], [ "class", "farmyard" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons" ]	[[], [], [], [], []]	Overture	120,222.488424	0.6	0.9	The polygon represents a small agricultural area, likely a farmyard, which is visible and coherent with the dense_subtypes provided. The mask is clearly visible as a purple overlay, and the polygon size is small but meaningful at 10m resolution. The proportional area is below 5%, but the feature is distinct and suitabl...	small agricultural farmyard	['rural farmstead area', 'small livestock enclosure', 'compact agricultural outbuilding cluster', 'isolated farmyard plot']	1	Canada	Northern America	0.51559	majortom_train_0000063	majortom_train_0000063_mask_1
603U_1027R_0_2	[ [ "land_cover", "moss" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons" ]	[[], [], [], []]	Overture	2,750,321.69176	0.8	0.6	The image shows a clear and coherent polygon covering a medium-sized area (39.43%) with a distinct land cover type. The purple mask is well-defined and matches the expected geometry for moss land cover, which typically forms dense, contiguous patches. The resolution is sufficient to identify the texture and pattern con...	moss-dominated land cover	['peatland moss vegetation', 'boreal moss ground cover', 'wetland moss habitat', 'tundra moss surface']	0.724111	Russia	Eastern Europe	0.763189	majortom_train_0000064	majortom_train_0000064_mask_0
603U_1027R_0_2	[ [ "water", "river" ], [ "class", "river" ] ]	[ "multipolygons" ]	[[]]	Overture	358.643453	0.7	0.9	The image clearly shows a river, matching the dense_subtypes ('water', 'river'). The polygon is visible as a transparent purple fill, covering a linear feature consistent with a river's geometry. The proportional area is very small (0.01%), but this is acceptable for rivers, which are meaningful regardless of area. The...	river	['meandering river', 'freshwater river channel', 'natural watercourse', 'inland river system']	0.688339	Russia	Eastern Europe	0.738725	majortom_train_0000064	majortom_train_0000064_mask_1
507U_990R_0_0	[ [ "infrastructure", "power" ], [ "class", "power_line" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons" ]	[[], [], [], []]	Overture	581.314368	0.7	0.9	The image shows a clear and well-defined power infrastructure element, specifically a power substation. The purple polygon accurately masks the substation, which is a compact and meaningful object for segmentation training. The proportional area is very small (0.01%), but the object is resolvable at 10m resolution and ...	power substation	['electrical substation facility', 'high-voltage power station', 'compact power distribution hub', 'utility-scale power conversion station']	0.4034	China	Eastern Asia	0.734002	majortom_train_0000072	majortom_train_0000072_mask_0
507U_990R_0_0	[ [ "infrastructure", "power" ], [ "class", "power_tower" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons" ]	[[], [], [], [], [], [], [], [], []]	Overture	0.156009	0.5	0.9	The image clearly shows a power infrastructure element consistent with the dense_subtypes ('infrastructure', 'power') and ('class', 'power_tower'). The polygon is small but clearly visible, with a green circle marker indicating the precise location of the power tower. The mask visibility is good, and the polygon geomet...	power transmission tower	['high-voltage power tower', 'electricity transmission pylon', 'steel lattice power tower', 'overhead power line support']	1	China	Eastern Asia	1	majortom_train_0000072	majortom_train_0000072_mask_1
101D_1377R_3_2	[ [ "place", "island" ] ]	[ "multipolygons" ]	['{"name:zh": "\\u5e1d\\u6c76\\u5c9b", "wikidata": "Q83067"}']	OSM	6,963,901.68104	0.9	0	The dense_subtypes indicate the polygon represents an 'island'. The image shows a clear landmass surrounded by water, with the polygon covering the entire visible land area. The polygon is large, coherent, and matches the expected geometry for an island. The mask visibility is excellent, with no contradictions to the p...	island	['small tropical island', 'coastal landmass', 'isolated island landform', 'oceanic island']	0.837552	East Timor	South-Eastern Asia	1	majortom_train_0000084	majortom_train_0000084_mask_0
545U_611R_0_1	[ [ "infrastructure", "power" ], [ "class", "minor_line" ] ]	[ "multipolygons" ]	[[]]	Overture	76.277285	0.5	0.9	The image shows a linear feature consistent with power infrastructure, specifically a minor power line. The polygon is small but clearly visible as a thin, winding line marked in purple. The mask visibility is good, and the geometry matches the expected subtype ('minor_line'). The proportional area is negligible, but t...	minor power line	['low-voltage transmission line', 'rural power distribution line', 'thin electrical infrastructure corridor', 'overhead utility line']	1	Kazakhstan	Central Asia	1	majortom_train_0000081	majortom_train_0000081_mask_0
587U_402L_3_1	[ [ "natural", "water" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons" ]	['{}', '{}', '{}', '{}', '{}', '{}', '{}']	OSM	1,252,866.666367	0.8	0.5	The image clearly shows a water body, consistent with the dense_subtypes ('natural', 'water'). The polygon is medium-sized (proportional_area 17.96%), with a clearly visible purple mask outlining a coherent water region. The mask visibility is good, and the geometry matches the expected shape of a water body (filled ar...	inland water body	['freshwater lake', 'boreal lake', 'small natural lake', 'northern latitude water body']	0.718518	Canada	Northern America	0.330343	majortom_train_0000076	majortom_train_0000076_mask_0
587U_402L_3_1	[ [ "land_cover", "wetland" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons" ]	[[], [], [], [], [], [], [], []]	Overture	199,724.828247	0.6	0.3	The image shows a clear wetland area with a well-defined polygon (purple mask). The polygon is coherent with the expected geometry for a wetland, appearing as a filled area rather than a line. The proportional area (2.86%) is small but meaningful for segmentation training, as wetlands can vary in size and this one is r...	boreal wetland	['peatland wetland', 'northern peat bog', 'inland freshwater wetland', 'forested wetland area']	0.756564	Canada	Northern America	0.590456	majortom_train_0000076	majortom_train_0000076_mask_1
492U_1084R_0_3	[ [ "water", "ocean" ], [ "class", "ocean" ] ]	[ "multipolygons" ]	[[]]	Overture	6,974,460.654257	0.95	0.5	The image is almost entirely covered by a single dense subtype ('water', 'ocean') with a proportional area of 99.99%, indicating a large, coherent region of ocean. The polygon is clearly visible and matches the expected geometry for an ocean surface. No contradictions to dense_subtypes are observed. The polygon size is...	ocean	['open ocean water', 'marine water body', 'coastal sea surface', 'deep ocean region']	0.821541	null	null	1	majortom_train_0000077	majortom_train_0000077_mask_0
492U_1084R_0_3	[ [ "water", "physical" ], [ "class", "sea" ] ]	[ "multipolygons" ]	[[{'wikidata': 'Q27092'}]]	Overture	6,974,460.654257	0.95	0.8	The image is nearly entirely covered by a polygon labeled as 'water' with subtype 'sea', occupying 99.99% of the area. The polygon is large, coherent, and matches the expected geometry for a sea surface. No contradictions to dense_subtypes are observed. Mask visibility is excellent, with a clear transparent purple fill...	sea water	['open ocean water', 'coastal sea surface', 'marine water body', 'saltwater sea']	0.79095	null	null	1	majortom_train_0000077	majortom_train_0000077_mask_1
94U_156R_3_2	[ [ "land_cover", "crop" ] ]	[ "multipolygons" ]	[[]]	Overture	2,125.48205	0.5	0.7	The image shows a small, linear feature filled with transparent purple, consistent with a narrow agricultural field or crop boundary. The polygon size is very small (0.03% proportional area), but the feature is clearly visible and coherent with the dense_subtypes ('land_cover', 'crop'). The mask visibility is reasonabl...	narrow agricultural field	['small crop strip', 'linear crop boundary', 'thin agricultural plot', 'narrow farmland segment']	0.417868	Cameroon	Middle Africa	0.6	majortom_train_0000079	majortom_train_0000079_mask_0
94U_156R_3_2	[ [ "land_cover", "grass" ] ]	[ "multipolygons" ]	[[]]	Overture	6,760,773.286272	0.9	0.5	The image shows a dense, homogeneous region consistent with the 'land_cover: grass' subtype. The polygon covers a large, contiguous area (proportional_area: 96.93%), making it a medium-to-large region. The purple mask is clearly visible and coherent, with no contradictions to the dense_subtypes. The geometry matches th...	grassland	['tropical grassland', 'savanna grassland', 'open grassy plain', 'herbaceous land cover']	0.292248	Cameroon	Middle Africa	0.607707	majortom_train_0000079	majortom_train_0000079_mask_1
782U_582R_0_1	[ [ "water", "river" ], [ "class", "river" ] ]	[ "multipolygons", "multipolygons" ]	[[], []]	Overture	882,808.771748	0.8	0.9	The image clearly shows a river with a well-defined polygon mask (purple). The polygon size is medium (proportional_area > 5%), and the geometry matches the expected linear and filled characteristics of a river. The mask visibility is good, with no contradictions to the dense_subtypes provided. The sample is suitable f...	river	['meandering freshwater river', 'large fluvial waterbody', 'natural watercourse', 'inland flowing channel']	0.710315	Russia	Eastern Europe	0.56852	majortom_train_0000096	majortom_train_0000096_mask_0
351U_922L_3_3	[ [ "infrastructure", "bridge" ], [ "class", "bridge" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons" ]	[[], [], [], [], [], []]	Overture	163.782862	0.7	0.9	The image shows a clear bridge structure with a visible purple polygon mask outlining the bridge. The polygon is linear and coherent with the 'bridge' subtype, matching the expected geometry. The proportional area is very small (0.0%), but this is acceptable for linear infrastructure features like bridges. The mask vis...	bridge	['highway overpass', 'road bridge', 'transportation bridge', 'elevated roadway']	0.534273	United States of America	Northern America	0.407498	majortom_train_0000085	majortom_train_0000085_mask_0
351U_922L_3_3	[ [ "infrastructure", "power" ], [ "class", "transformer" ] ]	[ "multipolygons" ]	[[]]	Overture	0.021058	0.5	0.9	The image shows a clear example of electrical infrastructure, specifically a power transformer, which matches the dense_subtypes provided. The polygon is marked with a green circle, indicating a small but distinct object. The mask visibility is good, and the object is coherent with the expected geometry for a transform...	power transformer	['electrical substation transformer', 'utility power transformer', 'small electrical transformer', 'overhead power infrastructure component']	1	United States of America	Northern America	1	majortom_train_0000085	majortom_train_0000085_mask_1
69D_1628R_0_1	[ [ "water", "river" ], [ "class", "river" ] ]	[ "multipolygons" ]	[[]]	Overture	890.045576	0.7	0.9	The image clearly shows a river, matching the dense_subtypes ('water', 'river'). The polygon is visible as a transparent purple fill along the river course, with coherent geometry for a linear water feature. The proportional area is very small (0.01%), but this is acceptable for rivers, which are meaningful regardless ...	river	['perennial river', 'tropical river', 'lowland river', 'meandering river channel']	0.679653	Papua New Guinea	Melanesia	0.617922	majortom_train_0000102	majortom_train_0000102_mask_0
444U_248R_1_2	[ [ "land_cover", "urban" ] ]	[ "multipolygons", "multipolygons" ]	[[], []]	Overture	43,078.853724	0.6	0.9	The image shows a small, clearly defined water body (likely a reservoir or pond) within an urban or peri-urban area. The polygon (purple mask) is small but coherent and matches the expected geometry for a water body subtype under 'land_cover'. The mask visibility is good, with no contradictions to the dense_subtypes ('...	urban water body	['small urban reservoir', 'peri-urban pond', 'artificial urban water feature', 'compact urban lake']	0.594556	Turkey	Western Asia	0.304527	majortom_train_0000090	majortom_train_0000090_mask_0
605U_174R_0_2	[ [ "water", "canal" ], [ "class", "drain" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygo...	[[], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], []]	Overture	1,555.50668	0.6	0.8	The image shows a narrow, linear feature consistent with a water canal or drain. The purple polygon mask is clearly visible and matches the expected geometry for a canal/drain (linear, not filled). The proportional area is very small (0.02%), but this is acceptable for linear features like water channels. The polygon i...	irrigation canal	['agricultural drainage channel', 'small water conveyance ditch', 'rural irrigation waterway', 'narrow artificial watercourse']	1	Belarus	Eastern Europe	0.670832	majortom_train_0000104	majortom_train_0000104_mask_0
605U_174R_0_2	[ [ "water", "river" ], [ "class", "river" ] ]	[ "multipolygons", "multipolygons" ]	[[], [{'wikidata': 'Q6545502'}]]	Overture	322.750259	0.5	0.9	The image shows a linear feature consistent with a river, matching the dense_subtypes ('water', 'river'). The polygon (purple mask) is small but clearly visible and coherent with the expected geometry of a river. The proportional area is 0.0%, but this is acceptable for linear features like rivers. Mask visibility is g...	river	['narrow meandering river', 'small watercourse', 'inland water channel', 'lowland river segment']	0.680511	Belarus	Eastern Europe	0.938689	majortom_train_0000104	majortom_train_0000104_mask_1
102U_301R_0_0	[ [ "land_use", "residential" ], [ "class", "residential" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygo...	[[], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], []]	Overture	93,787.167214	0.6	0.8	The polygon represents a very small proportional area (1.34%) but is clearly visible as a residential area with distinct building structures. The purple mask is coherent and matches the expected geometry for residential land use. The resolution is sufficient to identify individual buildings and the overall residential ...	rural residential area	['sparse settlement cluster', 'small village residential zone', 'low-density human settlement', 'rural housing compound']	1	South Sudan	Eastern Africa	0.570648	majortom_train_0000110	majortom_train_0000110_mask_0
470U_933R_3_2	[ [ "land_cover", "shrub" ] ]	[ "multipolygons" ]	[[]]	Overture	6,969,329.268741	0.95	0.7	The image shows a large, coherent region dominated by shrubland cover, matching the dense_subtypes ('land_cover', 'shrub'). The polygon is clearly visible with a transparent purple fill, covering a proportional area of 99.92%, which is very large and ideal for segmentation training. The shrubland texture is distinct an...	shrubland	['dense shrub cover', 'arid shrub vegetation', 'semi-arid shrubland', 'woody shrub area']	0.227989	China	Eastern Asia	0.572762	majortom_train_0000111	majortom_train_0000111_mask_0
355D_1421R_2_3	[ [ "natural", "mountain_range" ] ]	[ "multipolygons" ]	['{"fuzzy": "50000", "name:cs": "Velk\\u00e9 p\\u0159ed\\u011blov\\u00e9 poho\\u0159\\u00ed", "name:de": "Australisches Bergland", "name:es": "Gran Cordillera Divisoria", "name:et": "Suur Veelahkmeahelik", "name:nl": "Groot Australisch Scheidingsgebergte", "name:sk": "Ve\\u013ek\\u00e9 predelov\\u00e9 vrchy", "source:n...	OSM	6,964,719.033978	0.95	0.5	The image shows a large, coherent region with a transparent purple mask covering a significant portion of the area, consistent with the dense_subtypes label of 'natural mountain_range'. The polygon is clearly visible, with no contradictions to the provided metadata. The proportional area is very high (99.85%), indicati...	natural mountain range	['rugged terrain highland', 'elevated rocky outcrop region', 'arid mountainous landscape', 'semi-arid upland area']	0.827093	Australia	Australia and New Zealand	1	majortom_train_0000099	majortom_train_0000099_mask_0
39D_194R_2_1	[ [ "natural", "water" ] ]	[ "multipolygons" ]	['{"boat": "yes", "water": "river"}']	OSM	1,166,184.391952	0.8	0.7	The image shows a clear water body (likely a river or stream) with a well-defined polygon mask. The purple mask is visible and coherent with the expected geometry of a water feature. The proportional area (16.72%) indicates a medium-sized polygon, which is suitable for segmentation training. No contradictions to the de...	inland water body	['tropical river segment', 'small freshwater stream', 'forested watercourse', 'permanent natural waterway']	0.718518	Democratic Republic of the Congo	Middle Africa	0.290778	majortom_train_0000100	majortom_train_0000100_mask_0
281U_648R_3_2	[ [ "natural", "bare_rock" ] ]	[ "multipolygons" ]	['{"name:fr": "Kamgar Koh", "name:ur": "\\u06a9\\u0627\\u0645\\u06af\\u0627\\u0631 \\u06a9\\u0648\\u06c1"}']	OSM	6,706,871.590339	0.95	0.8	The image clearly shows a large, coherent region of natural bare rock, matching the dense_subtypes provided. The polygon covers a substantial area (96.16%) with excellent visibility and no contradictions to the label. The purple mask is clearly visible and well-defined, making it suitable for segmentation training. The...	bare rock outcrop	['exposed rocky terrain', 'natural bedrock surface', 'arid rock formation', 'unvegetated rocky area']	0.742564	Pakistan	Southern Asia	0.451237	majortom_train_0000101	majortom_train_0000101_mask_0
355D_1421R_2_3	[ [ "water", "stream" ], [ "class", "stream" ] ]	[ "multipolygons" ]	[[]]	Overture	505.62085	0.5	0.9	The image shows a clear linear feature consistent with a stream, matching the dense_subtypes ('water', 'stream'). The polygon is small but meaningful, with a visible purple mask (transparent fill) outlining the stream. The geometry aligns with expectations for a watercourse, and there are no contradictions to the provi...	stream	['narrow watercourse', 'small perennial stream', 'ephemeral drainage channel', 'linear water feature']	0.524608	Australia	Australia and New Zealand	0.489481	majortom_train_0000099	majortom_train_0000099_mask_1
281U_648R_3_2	[ [ "land", "rock" ], [ "class", "bare_rock" ] ]	[ "multipolygons" ]	[[]]	Overture	6,706,871.590339	0.95	0.7	The image clearly shows a large, coherent region of bare rock with excellent visibility and mask clarity. The polygon covers a substantial area (96.16%) and matches the dense_subtypes ('land', 'rock') and ('class', 'bare_rock') without contradiction. The purple mask is clearly visible and aligns well with the expected ...	bare rock formation	['exposed rocky terrain', 'arid rock outcrop', 'desert rock surface', 'unvegetated rocky land']	0.930886	Pakistan	Southern Asia	0.451237	majortom_train_0000101	majortom_train_0000101_mask_1
212U_769R_0_1	[ [ "land", "forest" ], [ "class", "forest" ] ]	[ "multipolygons" ]	[[{'wikidata': 'Q15265526'}]]	Overture	469,202.105912	0.8	0.7	The image shows a clearly defined polygon with transparent purple fill, covering a medium-sized area (6.73%) that aligns well with the dense_subtypes ('land', 'forest') and ('class', 'forest'). The polygon is coherent, representing a filled area of vegetation consistent with forest cover. No contradictions to the dense...	tropical deciduous forest	['dense dry forest patch', 'southern Asian woodland', 'seasonal forest stand', 'medium-scale forested area']	0.752365	India	Southern Asia	0.578342	majortom_train_0000088	majortom_train_0000088_mask_0
212U_769R_0_1	[ [ "land_use", "agriculture" ], [ "class", "farmland" ] ]	[ "multipolygons", "multipolygons", "multipolygons" ]	[[], [], []]	Overture	591,322.508317	0.8	0.6	The image shows a clearly defined agricultural field with a coherent polygon mask (purple). The polygon size is medium (8.48% proportional area), and the mask visibility is good, with no contradictions to the dense_subtypes ('agriculture', 'farmland'). The geometry matches the expected filled area for farmland, and the...	agricultural farmland	['irrigated cropland parcel', 'small-scale cultivated field', 'rural agricultural plot', 'seasonal farmland area']	1	India	Southern Asia	0.392044	majortom_train_0000088	majortom_train_0000088_mask_1
159D_412R_1_0	[ [ "land_cover", "grass" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons" ]	[[], [], [], [], [], []]	Overture	3,342,570.002577	0.6	0.1	The image shows a clear linear feature with a purple mask overlay, consistent with the dense_subtypes label ('land_cover', 'grass'). The polygon is medium-sized (proportional_area 47.92%), and the mask visibility is good, with no contradictions to the provided subtypes. The geometry matches expectations for a grassy ar...	grassy land strip	['linear grassy vegetation', 'grassy boundary area', 'narrow grassland patch', 'agricultural grass strip']	0.2951	Mozambique	Eastern Africa	0.626581	majortom_train_0000089	majortom_train_0000089_mask_0
445U_277R_2_2	[ [ "infrastructure", "tower" ], [ "class", "minaret" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons" ]	[[], [], [], [], [], [], [], []]	Overture	0.151694	0.5	0.9	The image shows multiple small, distinct structures marked with green circles, consistent with the dense_subtypes ('infrastructure', 'tower') and ('class', 'minaret'). The polygons are very small but clearly visible and meaningful at this resolution. The mask visibility is good, with transparent purple fill and green m...	religious tower	['mosque minaret', 'Islamic religious infrastructure', 'small religious tower', 'urban minaret structure']	1	Turkey	Western Asia	1	majortom_train_0000086	majortom_train_0000086_mask_0
445U_277R_2_2	[ [ "land_cover", "barren" ] ]	[ "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons", "multipolygons" ]	[[], [], [], [], [], []]	Overture	2,163,713.897345	0.8	0.5	The image shows a clear and coherent polygon with a transparent purple fill, representing a barren land cover area. The polygon is medium-sized (proportional area ~31%), with no contradictions to the dense_subtypes provided. The mask visibility is good, and the geometry matches the expected filled area for barren land ...	barren land	['exposed soil area', 'unvegetated terrain', 'arid land surface', 'degraded land patch']	0.267998	Turkey	Western Asia	0.958503	majortom_train_0000086	majortom_train_0000086_mask_1
526U_733L_2_2	[ [ "water", "river" ], [ "class", "river" ] ]	[ "multipolygons", "multipolygons" ]	[[], []]	Overture	519.12973	0.5	0.9	The image shows a linear feature consistent with a river, matching the dense_subtypes ('water', 'river'). The polygon is very small in proportional area (0.01%), but rivers are meaningful regardless of size. The purple mask is visible and coherent with the expected geometry of a river (linear, narrow). No contradiction...	river	['narrow watercourse', 'small perennial river', 'linear fluvial channel', 'inland waterway']	0.675266	United States of America	Northern America	0.767571	majortom_train_0000087	majortom_train_0000087_mask_0
140U_154R_1_2	[ [ "natural", "wetland" ] ]	[ "multipolygons" ]	['{"wetland": "wet_meadow"}']	OSM	6,973,891.89384	0.9	0.5	The image shows a coastal or wetland area with visible water bodies and land masses. The purple mask covers a large, irregularly shaped region that aligns well with the 'natural wetland' subtype. The polygon is coherent, covering a medium-to-large area (proportional_area = 99.98%), and the mask visibility is clear. No ...	coastal wetland	['tidal salt marsh', 'mangrove wetland', 'intertidal wetland zone', 'estuarine wetland']	0.767199	null	null	0.711433	majortom_train_0000127	majortom_train_0000127_mask_0
140U_154R_1_2	[ [ "land_cover", "wetland" ] ]	[ "multipolygons" ]	[[]]	Overture	6,973,891.89384	0.95	0.7	The image shows a coastal or wetland area with visible water bodies and land. The polygon (purple mask) covers a large, contiguous region that aligns well with the 'wetland' subtype under 'land_cover'. The mask is clearly visible, coherent, and matches the expected geometry for a wetland area. The proportional area is ...	coastal wetland	['tidal wetland area', 'saltwater marshland', 'intertidal wetland zone', 'coastal mangrove region']	0.769283	null	null	0.711433	majortom_train_0000127	majortom_train_0000127_mask_1

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TerraMesh-Masks

TerraMesh-Masks is a dataset for open-vocabulary segmentation of satellite imagery. This dataset provides binary segmentation masks with captions that extend the samples from TerraMesh. We also provide an human-verfied evaluation benchmark, called TerraMesh-Masks-Eval.

Examples from the training subset:

Usage

Download the data loading code from GitHub and install requirements with pip install -r requirements.txt. For development, you can stream data directly from Hugging Face.

Load training samples with:

from torch.utils.data import DataLoader
from terramesh.masks_dataset import build_terramesh_masks_dataset

dataset = build_terramesh_masks_dataset(
    urls="https://huggingface.co/datasets/ibm-esa-geospatial/TerraMesh-Masks/resolve/main/val/[BINARY_MASK,S2RGB]/majortom_shard_{000001...000793}.tar",
    batch_size=4,
    shardshuffle=100,
)

dataloader  = DataLoader(dataset, batch_size=None)
batch = next(iter(dataloader))

Download

Please note that the full dataset requires 18TB or storage and input images are provided by https://huggingface.co/ibm-esa-geospatial/TerraMesh.

# Download image data
hf download ibm-esa-geospatial/TerraMesh --repo-type dataset --local-dir data/TerraMesh

# Download binary mask data
hf download ibm-esa-geospatial/TerraMesh-Masks --repo-type dataset --local-dir data/TerraMesh

If you like to download only a subset of the data, you can specify it with --include.

# Only download a single modality (e.g., S2L2A)
hf download ibm-esa-geospatial/TerraMesh --repo-type dataset --include "*/S2L2A/*" --local-dir data/TerraMesh

# Only download val data from TerraMesh-Masks
hf download ibm-esa-geospatial/TerraMesh-Masks --repo-type dataset --include "val/*" --local-dir data/TerraMesh

Citation

Preprint for TerraMesh-Masks is coming soon!

TerraMesh:

@article{blumenstiel2025terramesh,
  title={Terramesh: A planetary mosaic of multimodal earth observation data},
  author={Blumenstiel, Benedikt and Fraccaro, Paolo and Marsocci, Valerio and Jakubik, Johannes and Maurogiovanni, Stefano and Czerkawski, Mikolaj and Sedona, Rocco and Cavallaro, Gabriele and Brunschwiler, Thomas and Bernabe-Moreno, Juan and others},
  journal={Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR) Workshops},
  year={2025},
}

Licenses

The mask annotations are released under ODbL, following the OpenStreetMap license.

The image data in TerraMesh is released under CC-BY-SA 4.0.

Acknowledgements

TerraMesh is part of the FAST‑EO project funded by the European Space Agency Φ‑Lab.

The binary annotations are based on the base layer provided by Overture Maps and from OpenStreetMap tags.

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