+20Hi All,
I’m new to process LiDAR data using FME and just received a bunch of LAS files that need to process as DEM (output).
I was doing some reading and users sue the _classifciation to classify the data but have just realised that my data isn’t classify as my classification filed is 0? Screenshot below:
I’ve also tried to use the PointCloudLASClassifier but the classification is 0 so doesn’t work.
Any trick to classify the data and be able to export the DEM?
Best answer by featuremichael
Hello
1.) Generate Points from your LAS Files with PointCloudToPointCoercer
Info: befor that, maybe you will reduce the number of points (PointCloudThinner)
2.) In your screenshot: i can see that the highlighted Point have the Value Z=40…. thats good.
2.1) The Output of the PointCloudToPointCoercer, should you send through a Tester.. but befor this you need to generade the Attribute Z/high of the Points you generated, with the CoordinateExtractor.
3.) Set a Tester with a Range from Z(0) Value to 1,. maybe thats enought ? (i dont know the Z values of allpoints from ur screenshot) and you can send this points to the DEMGenerator.
Hope i can help,
greetings Michael
+20Hi All - I have been doing some investigation ans seems the classification for the non-classified LAS data can be possible by using https://rapidlasso.de/ tool but need license for it,
Is there any workaround or tool to classify LiDAR data (within FME or outsite FME)?
Thanks
+9Hello
1.) Generate Points from your LAS Files with PointCloudToPointCoercer
Info: befor that, maybe you will reduce the number of points (PointCloudThinner)
2.) In your screenshot: i can see that the highlighted Point have the Value Z=40…. thats good.
2.1) The Output of the PointCloudToPointCoercer, should you send through a Tester.. but befor this you need to generade the Attribute Z/high of the Points you generated, with the CoordinateExtractor.
3.) Set a Tester with a Range from Z(0) Value to 1,. maybe thats enought ? (i dont know the Z values of allpoints from ur screenshot) and you can send this points to the DEMGenerator.
Hope i can help,
greetings Michael
+27Do all points in your point cloud have Classification=0?
You could also try another approach than the PointCloudLASClassifier - for some LAS files it doesn’t seem to catch the classification properly. See my screendump below; if I pass the data through a PointCloudSplitter and an AttributeFilter, the “Ground” Classification (2) turns out, but not when passed through the PointCloudLASClassifier.
