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Add r.colors.stddev algorithm

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Médéric RIBREUX
Médéric RIBREUX committed Feb 27, 2016
1 parent 91f3f18 commit 45f86a5619774e7b3b9e61733be12ef609adc70e
@@ -0,0 +1,7 @@
r.colors.stddev
Sets color rules based on stddev from a raster map's mean value.
Raster (r.*)
ParameterRaster|map|Name of raster map|False
*ParameterBoolean|-b|Color using standard deviation bands|False
*ParameterBoolean|-z|Force center at zero|False
OutputRaster|output|Stddev Colors
@@ -0,0 +1,80 @@
# -*- coding: utf-8 -*-

"""
***************************************************************************
r_colors_stddev.py
------------------
Date : February 2016
Copyright : (C) 2016 by Médéric Ribreux
Email : medspx at medspx dot fr
***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************
"""

__author__ = 'Médéric Ribreux'
__date__ = 'February 2016'
__copyright__ = '(C) 2016, Médéric Ribreux'

# This will get replaced with a git SHA1 when you do a git archive

__revision__ = '$Format:%H$'


def processInputs(alg):
# We need to import all the bands and to preserve color table
raster = alg.getParameterValue('map')
if raster in alg.exportedLayers.keys():
return

alg.setSessionProjectionFromLayer(raster, alg.commands)
destFilename = alg.getTempFilename()
alg.exportedLayers[raster] = destFilename
command = 'r.in.gdal input={} output={} --overwrite -o'.format(raster, destFilename)
alg.commands.append(command)

alg.setSessionProjectionFromProject(alg.commands)

region = unicode(alg.getParameterValue(alg.GRASS_REGION_EXTENT_PARAMETER))
regionCoords = region.split(',')
command = 'g.region'
command += ' -a'
command += ' n=' + unicode(regionCoords[3])
command += ' s=' + unicode(regionCoords[2])
command += ' e=' + unicode(regionCoords[1])
command += ' w=' + unicode(regionCoords[0])
cellsize = alg.getParameterValue(alg.GRASS_REGION_CELLSIZE_PARAMETER)
if cellsize:
command += ' res=' + unicode(cellsize)
else:
command += ' res=' + unicode(alg.getDefaultCellsize())
alignToResolution = alg.getParameterValue(alg.GRASS_REGION_ALIGN_TO_RESOLUTION)
if alignToResolution:
command += ' -a'
alg.commands.append(command)


def processCommand(alg):
# We need to remove output
output = alg.getOutputFromName('output')
alg.exportedLayers[output.value] = output.name + alg.uniqueSufix
alg.removeOutputFromName('output')
alg.processCommand()
alg.addOutput(output)


def processOutputs(alg):
# We need to export the raster with all its bands and its color table
output = alg.getOutputValue('output')
raster = alg.getParameterFromName('map')

# Get the list of rasters matching the basename
command = "r.out.gdal -t input={} output=\"{}\" createopt=\"TFW=YES,COMPRESS=LZW\"".format(
alg.exportedLayers[raster.value], output)
alg.commands.append(command)
alg.outputCommands.append(command)
@@ -32,6 +32,7 @@ def processInputs(alg):
if raster in alg.exportedLayers.keys():
return

alg.setSessionProjectionFromLayer(raster, alg.commands)
destFilename = alg.getTempFilename()
alg.exportedLayers[raster] = destFilename
command = 'r.in.gdal input={} output={} --overwrite -o'.format(raster, destFilename)

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