Hi Brad, I have version 2.1.0. I didn't install the plugin, I just forged pcl into my pdal environment. I thought that if I did that, then pdal would be linked to pcl and I could run the filter based on this example. https://pdal.io/tutorial/sampling/index.html Is this not correct? Alison -- Sent from: http://osgeo-org.1560.x6.nabble.com/PDAL-f4600080.html