This is neat! After the huge price increase a couple years ago with GMaps, it looks like you’ve come up with a creative way to offer much of the same functionality for most users. It’s unfortunate to still see small business sites to this day with error messages on their map widgets because of the API change from Google. I know nothing about mapping, but I’ve always had a dream of making a private neighborhood map wh…
public domain map data in GeoJSON format.
also, for google maps I know you can respond to interactions with the supplied points of interest like buildings, including homes, and from that point you can obtain an address via reverse geocoding or some other technique. I expect other mapping tools may have similar abilities but I don't have any experience with anything other than Google.