I had an idea for an indoor mapping app. Basically Google Maps for inside multi-unit buildings like hotels, apartments, office buildings, malls, etc. Existing m

I had an idea for an indoor mapping app. Basically Google Maps for inside multi-unit buildings like hotels, apartments, office buildings, malls, etc. Existing maps and navigation can get you to the street address, but there is no easy way to find building 3 or suite 240. I built a prototype Android app for data collection (I used WiFi hotspots as reference points to tag the location of landmarks inside). The big question is how to monetize something like that. You could maybe license the data to delivery companies but I'm not sure how big that market would be.