metadata
id: red_tide
type: element
name: Red tide / harmful algal bloom
task_types:
- semantic_segmentation
- classification
preferred_heads:
- validity
- context
- semantic_segmentation
label_formats:
- mask
- polygon
- image_label
positive_label: red_tide
negative_policy: unlabeled_is_ignore
typical_sensors:
- PMS
- MUX
- MSS
- MSI
- OLI
typical_resolutions_m:
- 10
- 30
Red Tide
Red tide is often a broad water-color anomaly rather than a sharp object. It may need both local texture/color features and broader context.
Required Context
- Water background and turbid-water hard negatives are important.
- Clouds, haze, sunglint, and sensor striping should be explicit context or ignored.
- Do not assume external water/land masks.
Recommended Output
- Pixel-level red-tide probability for segmentation data.
- Scene or patch-level likelihood when only weak labels are available.