Part 9 of N… , see e.g. my previous post on the topic.
We’ve been working to reduce the effect of overlapping samples on statistics we run on LiDAR data, and to do so, we’ve been using PDAL’s filters.sample approach. One catch: this handles the horizontal sampling problem well, but we might want to intentionally retain samples from high locations — after all, I want to see the trees for the forest and vice versa. So, it might behoove us to sample within each of our desired height classes to retain as much vertical information as possible.