Bill Voigt wrote:
>
>
> 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?
You can use the DimensionExtractor to store the dimension (2 or 3) in an
attribute, then test on that.
> 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?
I have no idea, but whenever I worked with generating surfaces in FME, I
just poured everything into the 3D_LINES port and let it rip... :)
Hope this helps.
--
Hans van der Maarel
Red Geographics
Zevenbergsepoort 44b www.redgeographics.com
4791 AE Klundert [EMAIL PROTECTED]
The Netherlands phone: +31-168-401035
For insights into what's up at Safe Software and what's on the development
horizon, visit Safe's blog at spatial-etl.blogspot.com.
Safe Software has also made slides available that outline enhancements planned
for FME 2007. The slides are from the "Road Ahead" presentation given on Day 2
of the FME Worldwide Users Conference. To view these slides, visit
www.safe.com/2006uc.
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