I want to create a detailed surface. I have a 100-scale accuracy dataset of
masspoints & breaklines in Autocad format. However, some of the lines are
apparently not 3d polylines. I suspect they are 2D lines where the elevation of
each vertex is represented by a constant Elevation property. When I try to use
them in the DEMRasterGenerator the process generates an error:
Breakline features must have 3 dimensions.
DEMRASTERGENERATOR(SurfaceModelFactory): SurfaceModelFactory: Fail to obtain
the 'DRAPED_FEATURES' from the underlying Surface Model.
The 3DForcer seems to be the transformer I need to apply to these lines, but I
don't want those lines that are already 3D to be touched. HOw do I filter them
from the 2d lines?
Also, I've searched the help files, but cannot find any explanation for the
differences between BREAKLINES and 3D_LINES which are the inputs for surface
generators. How do they relate to hard & soft breaklines that I've seen
referenced in other software?
THanks in advance,
--Bill
William G Voigt (415) 485-3366 voice
GIS Analyst II (415) 485-3334 fax
Dept Public Works 111 Morphew St
City of San Rafael San Rafael, CA 94901
