Hello,
I am loading citygml data with the OGC Citygml Reader and afterwards I want to calculate the normal vector of each roof surface.
How can this be done in FME for a big data set? Using the SurfaceNormalExtractor I get some errors that result in stopping the calculation. After sorting out that surface I have to restart the reader and the surface normal extractor. Is there a better workaround?
Thank you for your help in advance!
+12Thank you for your reply!
I have already chosen "Continue Translation". Unfortunately, this setting does not work for the transformer SurfaceNormalExtractor. Does someone have another idea?
+47Check out the PlanarityFilter - there is an option there to extract the Surface Normals - it is by far the fastest approach. http://docs.safe.com/fme/html/FME_Desktop_Documentation/FME_Transformers/Transformers/planarityfilter.htm#
Hi @bschweiger you can upload a test data set and workspace?
Hey,
since I am using unpublished data, I will search for another data set with the same problem. I hope to find some time this evening.
Check out the PlanarityFilter - there is an option there to extract the Surface Normals - it is by far the fastest approach. http://docs.safe.com/fme/html/FME_Desktop_Documentation/FME_Transformers/Transformers/planarityfilter.htm#
Hey,
another transformer would be really great!
I just checked the planarity filter, and I always get empty colums for the three surface normal cooordinates. Is it possible that the planarity filter can be just used for checking the planarity by specifying a normal vector?
Hi @bschweiger you can upload a test data set and workspace?
Hi,
with the free available LoD2 data set (EPSG 31256) below, I get the same problems with the surface normal extractor:
https://www.wien.gv.at/stadtentwicklung/stadtvermessung/geodaten/dachmodell/daten-lod2.html
You also find attached the workbench.
Thank you very much!
