hi all I use function queryByAttributes, i get 10 points. How can i get extent contain 10 points mapobj ? the coordinate(minx, miny,maxx,maxy of mapobj) contain 10 points. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.osgeo.org/pipermail/mapserver-dev/attachments/20080522/ea1d2a1c/attachment.html