Yet another location module for ProcessWire.
Users can drag a marker on map to get a lat lng value which is stored in a single field.
There is also an address lookup field that uses OpenStreetMap Nominatum to try and convert an address to a lat lng value (nb currently I'm passing an extra flag to Nominatum to limit to GB adresses - you should take that out if you're somewehere else).
The map uses OpenStreetMap for the tiles and Leaflet for the map library.
There are of course similar (more or less official) modules for ProcessWire for getting a location but they weren't quite right for us.
This module won't render a front end map for you so you should probably use one of the other alternatives if that's what you need.
Because other options exist, I probably won't submit this to the module repo on the main ProcessWire site unless people want me to. I'm happy to take a look at any other developments you might need though, so feel free to get in touch.