Producing a clipped LAS file on the basis of features from a DGN file

Is there a reason that the Clipper won't do the job?

Hi @prasadkmurthy,

Looks like some of the features going into the LAS writer are not pointclouds :

"LAS writer: Failed to obtain point cloud from feature. Only features with point cloud geometry are expected" I suggest you add a Geometry Filter before the LAS writer to filter out these features.

Hope this helps.

Thanks @itay I also wanted to check what is the best way to convert selected featuretypes in the DGN file into "clipper" objects that can be fed to the Clipper transformer ? Any pointers appreciated.

I will add the Geometry filter as suggested by you.

Yes, it looks like the clipper rejected 152 features. Use a GeometryFilter to make sure the dgn is areal. If they are self closing polylines you can use a GeometryCoercer to convert to areal, if it takes multiple features to create the outline, then you'll want to use an AreaBuilder, and you may need to set a Snapping Tolerance. Be advised that an AreaBuilder requires a topologically correct input (all lines are broken at intersections) and will create areal features for all potential polygons. ie a donut will have both the donut and the hole as separate features.