PDAL/PDAL — pull request #537 by chambbj (2014-10-22 14:09:56+00:00)
Title: Add filter to sort points by Morton order, and kernel to expose this as an app

This was added to see if it impacted performance of the PCL algorithms, but may have use elsewhere. It _should_ be similar to what lassort does (spatial only, not temporally), which greatly improves compression efficiency.