I want to keep only the LiDAR ground points in a las file, using the
lasground tool from LAStools within QGIS. In QGIS Chugiak (2.4) there used to be an option to "keep class 2", but I don't know how to do it in the more recent version 2.14.
I tried to write in additional command line parameter(s) "keep class 2", but it breaks.
If anybody knows how to do it in lasground toolbox (bin) it would be also fine.