With just html5 can I make a app that can log infomation associated with a GPS location?

Question

I want to make a app that when opened prompts by asking for a submit or gate key. Submit for a code or note. gate key loads brings up the information saved for that GPS location.

Answer 1

Research into the geolocation api, I suggest Google as a learning resource - they do afterall run a global mapping service.
Then use localStorage to store location data on the user's computer with their private key, etc...