MarCast Map Data

The MarCast app ships map databases derived from OpenStreetMap, available under the Open Database License (ODbL) 1.0. Machine-readable copies of those files, byte-identical to the ones in the app, are available here free of charge:

• land.pmtiles — coastline/land polygons (PMTiles, ~28 MB)
• land_mask.png — land/water grid
• tz_index.png and tz_zones.json — time-zone lookup (timezone-boundary-builder)
• LICENSE.txt — provenance and encoding notes

© OpenStreetMap contributors.