[pdal-commits] [PDAL/PDAL] f690d8: Add DerivativeWriter

[GitHub]

  Branch: refs/heads/derivative-writer
  Home:   https://github.com/PDAL/PDAL
  Commit: f690d87e7c6c70033800b7443da1bf8f6972a179
      https://github.com/PDAL/PDAL/commit/f690d87e7c6c70033800b7443da1bf8f6972a179
  Author: Bradley J Chambers <brad.chambers at gmail.com>
  Date:   2015-08-10 (Mon, 10 Aug 2015)

  Changed paths:
    M doc/stages/index.rst
    A doc/stages/writers.derivative.rst
    M io/CMakeLists.txt
    A io/derivative/CMakeLists.txt
    A io/derivative/DerivativeWriter.cpp
    A io/derivative/DerivativeWriter.hpp
    M src/CMakeLists.txt
    M src/StageFactory.cpp

  Log Message:
  -----------
  Add DerivativeWriter

The derivative writer produces a GeoTIFF of one of the following primary
topographic attributes.

* Slope D8 (default)
* Slope FD
* Aspect D8
* Aspect FD
* Contour curvature
* Profile curvature
* Tangential curvature
* Total curvature
* Hillshade
* Catchment area

Surface derivatives are computed using the max Z value at a given grid
size.