The Coordinate-Updater is a Javascript plug-in for your Wikipedia profile. When activated it watches your edits for changes in geographical coordinate data and transmits updates to the central geocoding database on the Toolserver.

Note that along with the geodata your username is transmitted for statistical purposes (I could be obtained by crossreferencing with the article histories anyways...).

Installation

Insert the following snippet into your monobook.js file:

// [[User:Dschwen/coordupdate.js]] - please include this line
document.write('<script type="text/javascript" src="'
     + 'http://commons.wikimedia.org/w/index.php?title=User:Dschwen/coordupdate.js'
     + '&action=raw&ctype=text/javascript&dontcountme=s"></script>');