I'm guessing the maps:// URI should just open the map with the parameter as a search term, while the geo:// URI gives an exact location, and the uncertainty parameter can be used to set the circle size similar to how the user's position is displayed.
You should expose the geo:// URI, which appears as: <lat>,< lon>[,< alt>][; u=<uncertainty> ]
geo:
http:// en.wikipedia. org/wiki/ Geo_URI
In addition, there is another (not yet official) URI, which is maps://: q=<physical location>
maps:
https:/ /www.iana. org/assignments /uri-schemes/ prov/maps
I'm guessing the maps:// URI should just open the map with the parameter as a search term, while the geo:// URI gives an exact location, and the uncertainty parameter can be used to set the circle size similar to how the user's position is displayed.