Mesh Support
LandMap 2.0 has the ability to save scan areas in the Collada file format. This lets you upload them directly to SL as a mesh.

Unfortunately, due to current mesh costs and the mesh physics system, mesh is not recomended for LandMap at this time.

One use for mesh is to cover areas with large elevation changes (bigger than 32 meters) as mesh will not lose accuracy as sculpties do. However this will cost a lot of prims.

In the future if mesh costs drop or more support for mesh is enabled via LSL, LandMap may be expanded to use mesh as its primary building device. For now however, sculpties are recomended over mesh.

No support will be given for uploading and using meshes.
Please see the Official Mesh Help Guide for more info.

http://wiki.secondlife.com/wiki/Mesh