.dwg to SURFER? in Other Programs... Posted May 11, 2009 · Report reply Hi, I'm a total newbie in using both Surfer and AutoCad Map, and trying to import information of a .dwg file to Surfer (to make a 3D map of a lake). I'm using AutoCad Map 3D 2009, and tried saving .dwg as .dxf, but then I don't get the z-dimension to Surfer. I've been told I should try using "DXF2XYZ " to convert .dfx to XYZ file, but there seems to be some problem with this. Does saving the .dwg as .dxf in AutoCad Map already loose the z-component, and how could i avoid this? Thanks in advance to anyone and everyone who give any suggestions about fixing this.