To anyone considering going to all this effort, consider doing this work on OpenStreetMap. 50K contributors make OSM a bit better every month but a good map is never finished. https://rapideditor.org/edit
Use iD or JOSM on desktop, StreetComplete/Every Door/Go Map!!/Vespucci on the phone. Survey POIs in your local area, with your own feet. Big tech can't do that ;)