https://location.services.mozilla.com/downloads https://opencellid.org/
https://github.com/Leaflet/Leaflet https://github.com/kolonist/bscoords
https://github.com/osmdroid/osmdroid
https://github.com/openstreetmap/openstreetmap-website https://github.com/openstreetmap/Nominatim https://github.com/openstreetmap/osm2pgsql https://wiki.openstreetmap.org/wiki/Downloading_data