Datasets:
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longitude float32 -179.98 180 | latitude float32 -89.98 90 | bouguer_anomaly_mgal float32 -528.96 1.01k | freeair_anomaly_mgal float32 -388.63 991 | geometry unknown |
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End of preview. Expand in Data Studio
Quick Links
World Gravity Map 2012 (WGM2012) — Modernized
Global 2′ × 2′ gravity anomaly grids — Bouguer and free-air — from the Bureau Gravimétrique International (BGI), converted into a partitioned, machine-readable GeoParquet dataset for AI systems, APIs, GIS, and scientific applications.
Sourced via NORA Research Lab's own AGDFS gravity endpoint (tiled global fetch at full native resolution) rather than a fresh BGI portal download.
Contents
geoparquet/— point-based GeoParquet partitions (EPSG:4326), one file per 10° latitude bandmetadata.json— provenance, citation, value ranges, license, known gaps
Columns
| Column | Description |
|---|---|
longitude / latitude |
Grid cell centroid (degrees, WGS84) |
bouguer_anomaly_mgal |
Complete spherical Bouguer anomaly (mGal) |
freeair_anomaly_mgal |
Surface free-air anomaly, Molodenski (mGal) |
geometry |
Point geometry (WGS84) |
Known gap: Isostatic anomaly (Airy-Heiskanen, Tc=30km) is part of the
original WGM2012 release but is not currently exposed by the AGDFS gravity
endpoint, so it is not included here. See metadata.json for details — it
can be added later if that layer becomes available.
Source & Citation
Bonvalot, S., Briais, A., Kuhn, M., Peyrefitte, A., Vales, N., Biancale, R., Gabalda, G., Moreaux, G., Reinquin, F. & Sarrailh, M. (2012). Global grids: World Gravity Map (WGM2012). Bureau Gravimetrique International. https://doi.org/10.18168/bgi.23
License
Academic/research use per BGI terms — no warranty on accuracy; BGI is not responsible for consequences of use.
Modernized by NORA Research Lab.
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