Gridding large [x,y,z] point cloud datasets. Matlab and python have both failed me with their inefficient use of memory. So I'm having to turn to other tools.
Points2Grid is a tool, written in C++, which promises to do the job in a simple intuitive way. It accepts ascii and las (lidar) formats and outputs gridded data, plus gridded data densities.
First install LIBLAS which is Lidar data translation libraries. The recommended version is 1.2.1. I installed liblas 1.6.1 because it was the oldest version on the site that had a working link. I installed this by issuing: