Title is a big question, so some detail. I am an experienced 2D AutoCAD user - not an expert. I have been working on combining some drawings of a large manufacturing facility into one drawing. One of the drawings that I have to work with from an outside engineering firm is a pain. It took me a while but i finally figured out that they had put some of the drawing in 3D. Now this is a site layout with buildings, railroads, roads - basically a civil drawing. When I tried to convert some of the perimeter lines for parking and building to polylines to make things easier for what I was doing they would not all convert. Not being a 3D person I was lost. I finally figured it out. Some of the lines just took off into Z-axis space for no good reason.
Now my question. Is there a way to grab the entire drawing and convert it so that it will all be on the X-Y axis with no Z value (Z=0) ???
I managed to make it work by changing individual entities but I have discovered that all this engineering companies drawings are "mined" this same way (as in bombs). The company I worked for paid for these drawings and owns them and this sucks. We have fired this firm and will never use them again.
Thanks in advance for any help!