Overview geography: Natural Earth 1:110m land, public domain.
Downloaded 2026-09-07 from the Natural Earth vector repository:
https://raw.githubusercontent.com/nvkelso/natural-earth-vector/master/geojson/ne_110m_land.geojson
Source project: https://www.naturalearthdata.com/downloads/110m-physical-vectors/
Terms: https://www.naturalearthdata.com/about/terms-of-use/
OverviewLand.json contains the source polygon rings (longitude, latitude), with attributes removed.
This is a small-scale geographic locator, not marine chart data.
