Hello,
I want to create a raster for each different source_point_id (number of flighline) in a single las file.
Do you know how to extract the source point id from the las file in order to generate a raster on the points of the chosen source_id point?
thanks you for your help!
Best answer by redgeographics
If you can expose that attribute (my sample LAS seems to have it as point_source_id) you can use the Group By option on the DEMGenerator (and/or SurfaceModeller) to generate separate DEM's for all unique values of that attribute.
The trick is to get that attribute, a PointCloudCoercer can do that for you, but has the downside of breaking down the point cloud into individual points, so you do get a big performance hit.
+59If you can expose that attribute (my sample LAS seems to have it as point_source_id) you can use the Group By option on the DEMGenerator (and/or SurfaceModeller) to generate separate DEM's for all unique values of that attribute.
The trick is to get that attribute, a PointCloudCoercer can do that for you, but has the downside of breaking down the point cloud into individual points, so you do get a big performance hit.
If you can expose that attribute (my sample LAS seems to have it as point_source_id) you can use the Group By option on the DEMGenerator (and/or SurfaceModeller) to generate separate DEM's for all unique values of that attribute.
The trick is to get that attribute, a PointCloudCoercer can do that for you, but has the downside of breaking down the point cloud into individual points, so you do get a big performance hit.
Yes but how to extract point_source_id in my las file to use group by in DEMgenerator?
It is this point_source_id information that I can't get out of my las file.
+59Yes but how to extract point_source_id in my las file to use group by in DEMgenerator?
It is this point_source_id information that I can't get out of my las file.
That can be specified in the PointCloudCoercer:
Yes but how to extract point_source_id in my las file to use group by in DEMgenerator?
It is this point_source_id information that I can't get out of my las file.
Thanks you very much!
It's the result I wanted
+59Yes but how to extract point_source_id in my las file to use group by in DEMgenerator?
It is this point_source_id information that I can't get out of my las file.
You're welcome!
