Hello I added in the GISWiki an Extension for use (reuse) georeferenced maps and one point in this map represents. Perhaps the Extension is for the Wikipedia of use. The point coordinates are handed over in the format geographical latitude and longitude (WGS84). The first example shows a Germany map with a red point for the situation of a city (similar as in many articles of the german Wikipedia)

Link: http://www.giswiki.de/index.php/Point-Mapping_Extension

Heinz