Extended Continental Shelf (ECS) Boundaries

Global polygons delineating Extended Continental Shelf areas — the seabed and subsoil beyond 200 nautical miles claimed by coastal states under UNCLOS Article 76. From the Marine Regions Maritime Boundaries Geodatabase: Extended Continental Shelves, version 2 (147 polygons). Includes formal CLCS submissions, CLCS recommendations, DOALOS deposits, non-UNCLOS claims, and overlapping-claim areas.

• Bucket: public-high-seas
• Prefix: ecs/
• CRS: WGS 84 (EPSG:4326 / OGC:CRS84)
• Geometry: 147 polygon / multipolygon features, global coverage
• License: CC-BY 4.0 (Flanders Marine Institute / VLIZ)

⚠️ Not for legal, navigational, or resource-exploration use. Marine Regions ECS data is for scientific, educational, and research purposes only and has no legal value. VLIZ expresses no opinion on the legal status of any claim or boundary.

Citation

Flanders Marine Institute (2024). Maritime Boundaries Geodatabase: Extended Continental Shelves, version 2. Available online at https://www.marineregions.org/. https://doi.org/10.14284/697

Assets

MapLibre GL JS

The PMTiles source-layer is ecs (the last segment of the dataset name).

DuckDB

Hex area warning: AREA_KM2 is a per-feature total repeated on every hex row a polygon covers. Never SUM(AREA_KM2) over hex data — compute area from cell counts (COUNT(DISTINCT h8) × cell_area_at_res_8) or dedup by MRGID_ECS first.