I am trying to import a .dwg topographical file so I have a terrain layer. When I import the file, I end up with ridiculous measurements for existing buildings = 128km long shed for example. The file was produced around 2006, so its probably done in quite an old version of Autocad.
I’ve read threads on other peoples problems with this, and I know the solution is to set the units correctly on the import. But how do you know what units to use? I can’t believe its just trial and error. I don’t have Autocad, so can’t view the file or its attributes. I’ve tried most of the metric options, and they all give incorrect results.
I have also tried the option of scaling the imported terrain by applying a known measured length with the measuring tool - but it doesn’t work. I get a message saying imported files can’t be scaled.
I’ve finally tried to use geo location data from Sketchup, but the resolution is far too low to be of any use.
Does anyone have any suggestions on what to try next?