[pdal] Is PDAL capable of producing Lidar grid metrics?

[Bradley Chambers]

Aaron,

This is absolutely possible; it just doesn't exist out of the box today. We
do something similar in our DerivativeWriter today (
https://github.com/PDAL/PDAL/blob/master/io/derivative/DerivativeWriter.cpp).
That may be a good place to look for inspiration. I think in the end you
are looking for a GridMetricsWriter though. Are you needing a full
replacement of the FUSION function? Or just a few select metrics?

Brad

On Thu, Sep 1, 2016 at 9:22 AM Aaron Poznanovic <aaron at redfoxgis.com> wrote:

> Greetings,
>
> This is a follow-up to a question posted over at GIS Stack Exchange (
> http://gis.stackexchange.com/questions/175454/are-pdal-or-pcl-capable-of-producing-lidar-grid-metrics).
> I'm curious what functionality or approach one would take with PDAL to
> calculate Lidar grid metrics?
>
> FUSION is currently the best available set of tools that I know of for
> calculating Lidar grid metrics, which are useful for describing forest
> structure (http://forsys.cfr.washington.edu/fusion/fusionlatest.html).
> From the FUSION documentation (page 70 from the documentation
> http://forsys.cfr.washington.edu/fusion/FUSION_manual.pdf):
>
> GridMetrics computes a series of descriptive statistics for a LIDAR data
> set. Output is a raster (grid) represented in database form with each
> record corresponding to a single grid cell.
>
> Essentially, I'm interested in producing a raster dataset where each cell
> represents summarized descriptive statistics for the Lidar point cloud such
> as cover, skewness, 75th percentile, etc (all of the grid metrics I'm after
> are available on the FUSION documentation. Is this currently possible, or
> recommended, with PDAL, or would this require other libraries? Many thanks
> in advance.
>
> Best Regards,
>
> -Aaron
>
> Currently
>
>
> Aaron J. Poznanovic, GISP
> Principal Consultant
> Red Fox GIS & Remote Sensing
> (218) 387-4050
> www.redfoxgis.com
>
>
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