Map app is an offline map of the plateau and cave entrances. Fundamentally it is a website, which can be <ahref="/expofiles/mapapp/mapapp.zip">downloaded</a> as a zip file. Once downloaded it can be extracted to some where on your phone.
Now we need to host the website on your phone, in a way that your browser will trust the website to geolocate you. On android this can be done using simpe HTTP server.