I spend a lot of my time talking to Civil 3D users about the wonderful (and often overlooked features) of Map. After all, Civil 3D is built on top of Map, and Map offers a host of functionality not even related to GIS. One of those functions is the QUERY.
Queries allow us to bring all or parts of a Source Drawing. This is a drawing that we’ve attached to our current drawing using the Map workspace. Queries are wonderful because they can bring in data from a drawing based on object properties, object location, object data, or SQL information.
In the past, I’ve used Map Query to bring a drawing in one coodinate system over to another coordinate system. This is done by setting the coordinate system in the source drawing, setting the desired coordinate system in a blank drawing, and querying in all data into the blank drawing. The coordinate conversion is relatively automatic.
Map queries won’t work with Civil 3D objects. I had a drawing with ONLY Civil 3D objects in it, and Map queried in nothing. So, for all of you who had the incredible idea of querying your data to do a coordinate zone conversion, you’ve got to come up with a better way. I’m working on trying to figure that out now.