Metal Collection

In some countries , metals rubbish around the streets annoying people , so the idea is all about collecting these metals and recycle it.
so you have some features:
1-map with metal coordinates.
2-give user next metal and approximate kg.
3- mesure collectors performance.
4-some charts and statistics.
5- people add new metal coordinates and other could give some notes about it.
6- we have 3 user types(people , collector ,admin)