ok i found it :) http://www.freemapload.de/article.php?id=17930&group=gmane.comp.gis.postgis there is the same function but without bugs and it works. I checked already. It is fine thanks a lot Simon -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.refractions.net/pipermail/postgis-users/attachments/20081217/640757c5/attachment.html