Hi Don -I’m working with a CAD map in ARCGIS 9.2 and I’ve found many of your suggestions to be very helpful! I’m trying to create a reference grid tying it in to GPS points that I’ve overlayed onto the CAD map – I’ve had no success using the grid creation options with ARCGIS – any suggestions? I am not sure I fully understand your question. Tying the coordinates of a CAD file to a Map in ArcGIS is done most easily using the georeferencing toolbar in ArcMap. The tool performs a two point affine transformation: Move, Scale and Rotate. Error distributoins, rubbersheeting and the alike can only be performed on data that is in the GIS format. You can copy the CAD data to a geodatabase and rubbersheet the dat there. Hope that helps… tell me more if I missed it. The postings on this site are my own and donât necessarily represent ESRIâs positions, strategies or opinions Source.