I have Civil 3D 2012 with ArcGIS for AutoCAD 300. I want to read the extents of a polygon in the drawing. Feature Class in A4A300 = Boundaries, the CAD layer is PROP-BNDY, there is only one polygon on that layer since it is the perimeter of the site. Do I have to convert the polygon to a temporary shapefile, read it, and then delete it? I will be using the boundary extents plus a constant in all directions to clip raster images. The process should not involve user input. I have 30 directories that I will be looping through, a drawing file in each directory and a polygon in each drawing. I have the python routines for creating a list of directories that have the *map.dwg files in them and I'm familiar with clipping the rasters, I just cannot find how to read the polygon extents in the dwg file. Your help is greatly appreciated!!