It combines an interactive web map with a geographically-referenced wiki system. As of May 2014, over 23,000,000 objects have been marked by registered users and guests.
According to its website, "WikiMapia is an open-content collaborative mapping project, aimed at marking all geographical objects in the world and providing a useful description of them.
It aims to, "create and maintain a free, complete, multilingual and up-to-date map of the whole world. Wikimapia intends to contain detailed information about every place on Earth.
The Wikimapia website provides a Google Maps API-based interactive web map that consists of user-generated information layered on top of Google Maps satellite imagery and other resources. The navigation interface provides scroll and zoom functionality similar to that of Google Maps.
The Wikimapia layer is a collection of "objects" with a polygonal outline (such as buildings, lakes, etc) and "linear features" (such as streets, railroads, rivers, etc). Streets are connected by intersection points to form a street grid. Both kinds of items may have textual descriptions and photos attached to them. Viewers can click on any marked object or street segment to see its description. Descriptions can be searched by a built-in search tool. Facilities are provided to highlight objects by category and to measure distances between objects.
The interface is available in many languages, and the textual description of each item may have multiple versions in different languages.
Wikimapia maps can also be embedded on other websites.
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