Hi Jeroen, I've tried your extension kml export, but it doesn't seems to work on my wiki ! I can publish googlemaps (so it seems working well) with Maps and Semantic-Maps. I even tried with adding 'kml' format in the array in the settings of result formats or adding $srfgFormats = 'kml'; in the localsettings.php
on the page http://semantic-mediawiki.org/wiki/Help:KML_format you give two examples of queries for coords, how do we get the kml export file?
Thanks for answer and continue working in Wikipedia !!!