----------------------------Original message---------------------------- Hello all: I have a contour map made in Autocad, each polyline with this respective elevation or z value. I must to create a surface or a DEM file with this source but I don't have the right tool to obtain this new format. My intention is export this map to another 3d softwarea to render the surfcace . Somebody know some software tool to convert my autocad file to a DEM file or 3d Surface (Mesh topographic file)? Thanks in advance Raul Cole from Costa Rica. --------------------------------------------------------- Get Your *Web-Based* Free Email at http://www.hotmail.com ---------------------------------------------------------