Wiki Site and Google Map Link

I am looking for a website to be built which has wiki capability and also a google map display. The google map should allow pinpoint additions and be linked to a longitude/latitude or location field in the wiki. The longitude/latitude or location field should be completed manually or ideally following a search completed on googlemaps. Aloowing the link to take place. The wiki part of the map is to record location of places where people have visited. So it should also allow inclusion of photos. In essence it should have similar functionality as [login to view URL] But allowing the addition of greater detail