I need to create a truncated contour map based on data from a .asc file. I have connected the .asc file but there is no option for adding with query so I have brought the whole file in.
I then created a contour layer and added to map (all good so far) but when attempting to query this layer for my area of interest nothing appeared on screen.
I then did some manipulation of the sdf to create polylines at the contour elevation and tried to MAPTRIM but I stopped Civil 3D after having "not responding" for 15 minutes
The easiest way to accomplish this is to crop the .ASC before _MAPCONNECTing it.
For instance, Microdem is a free software able to create a georeferenced subset of a Dem.
I ended up creating the contour layer for the whole DEM, exporting to SDF and then importing to a new drawing.
I the used Boundary trim on small areas (about 7 in all) at a time to trim it and then queried to chage the elevation attribute.
I think it was crashing becasue I tried to trim everything at one (in an 80Mb file, 1m contour spacings = a lot of data)
Access a broad range of knowledge to help get the most out of your products and services.
Start with some of our most frequented solutions or visit the Installation and Licensing Forum to get help installing your software.
Upgrading to a 2015 product? Make sure to check these out 1st!