OpenStreetMap coastline data extract and derivative geometry

Copyright OpenStreetMap contributors.
Licensed under the Open Data Commons Open Database License (ODbL) 1.0:
https://opendatacommons.org/licenses/odbl/1-0/

Attribution and source: https://www.openstreetmap.org/copyright
Derived data file: osm-coastline.geojson
Source extract: osm-coastline-get.json
Query: osm-coastline-query.txt
Source snapshot: 2026-10-23T23:28:51Z

Processing: 13 natural=coastline ways joined at shared vertices, projected to EPSG:31370, simplified by 4 metres with topology preservation, and transformed back to WGS84. No geometry added from MDK or Google Maps.

This notice applies to the OpenStreetMap data layer. Other source layers and original illustrations retain their separately documented licences.