[pdal] Colorization filter slow?

[Howard Butler]

> On Oct 29, 2015, at 10:46 AM, Thomas Knudsen <knudsen.thomas at gmail.com> wrote:
> 
> I’m trying to add colour to a laz file with approx 8 Mpts using a
> pipeline with filters.colorization and a 10000 px x 10000 px geotiff
> orthophoto, covering the same 1 km x 1 km tile as the laz file (see
> details below).
> 
> It works fine but takes almost 4 minutes. The same operation using the
> LAStools lascolor tool gives similar results for a runtime of around
> 15 seconds - a factor of 15 difference.
> 
> Is this as expected, or am I doing something stupid?

Not expected and you aren't stupid.

This sounds like a good test case for us to optimize. How we use GDAL to fetch the raster pixels is not so smart. Can you send me info privately to work with this set?