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[processing] add gdal color-relief algorithm (addresses #7201)

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alexbruy committed Oct 13, 2013
1 parent f2c2114 commit 273caa6b6ca3971834ec62279c75b553b5e58617
@@ -0,0 +1,94 @@
# -*- coding: utf-8 -*-

"""
***************************************************************************
ColorRelief.py
---------------------
Date : October 2013
Copyright : (C) 2013 by Alexander Bruy
Email : alexander dot bruy at gmail dot com
***************************************************************************
* *
* 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__ = 'Alexander Bruy'
__date__ = 'October 2013'
__copyright__ = '(C) 2013, Alexander Bruy'

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

__revision__ = '$Format:%H$'


from PyQt4.QtGui import *

from processing.core.GeoAlgorithm import GeoAlgorithm
from processing.parameters.ParameterRaster import ParameterRaster
from processing.parameters.ParameterBoolean import ParameterBoolean
from processing.parameters.ParameterNumber import ParameterNumber
from processing.parameters.ParameterFile import ParameterFile
from processing.parameters.ParameterSelection import ParameterSelection
from processing.outputs.OutputRaster import OutputRaster
from processing.gdal.GdalUtils import GdalUtils
from processing.tools.system import *


class ColorRelief(GeoAlgorithm):

INPUT = 'INPUT'
BAND = 'BAND'
COMPUTE_EDGES = 'COMPUTE_EDGES'
COLOR_TABLE = 'COLOR_TABLE'
MATCH_MODE = 'MATCH_MODE'
OUTPUT = 'OUTPUT'

MATCHING_MODES = ['"0,0,0,0" RGBA', 'Exact color', 'Nearest color']

#def getIcon(self):
# filepath = os.path.dirname(__file__) + '/icons/dem.png'
# return QIcon(filepath)

def defineCharacteristics(self):
self.name = 'Color relief'
self.group = '[GDAL] Analysis'
self.addParameter(ParameterRaster(self.INPUT, 'Input layer'))
self.addParameter(ParameterNumber(self.BAND, 'Band number', 1, 99, 1))
self.addParameter(ParameterBoolean(self.COMPUTE_EDGES, 'Compute edges',
False))
self.addParameter(ParameterFile(self.COLOR_TABLE,
'Color configuration file', optional=False))
self.addParameter(ParameterSelection(self.MATCH_MODE,
'Matching mode', self.MATCHING_MODES, 0))

self.addOutput(OutputRaster(self.OUTPUT, 'Output file'))

def processAlgorithm(self, progress):
arguments = ['color-relief']
arguments.append(unicode(self.getParameterValue(self.INPUT)))
arguments.append(unicode(self.getParameterValue(self.COLOR_TABLE)))
#filePath = unicode(self.getParameterValue(self.COLOR_TABLE))
#if filePath is None or filePath == '':
# filePath = os.path.join(os.path.dirname(__file__), 'terrain.txt')
#arguments.append(filePath)
arguments.append(unicode(self.getOutputValue(self.OUTPUT)))

arguments.append('-b')
arguments.append(str(self.getParameterValue(self.BAND)))

if self.getParameterValue(self.COMPUTE_EDGES):
arguments.append('-compute_edges')

mode = self.getParameterValue(self.MATCH_MODE)
if mode == 1:
arguments.append('-exact_color_entry')
elif mode == 2:
arguments.append('-nearest_color_entry')

GdalUtils.runGdal(['gdaldem',
GdalUtils.escapeAndJoin(arguments)], progress)
@@ -60,6 +60,7 @@
from processing.gdal.tri import tri
from processing.gdal.tpi import tpi
from processing.gdal.roughness import roughness
from processing.gdal.ColorRelief import ColorRelief

from processing.gdal.ogr2ogr import Ogr2Ogr
from processing.gdal.ogrinfo import OgrInfo
@@ -112,6 +113,7 @@ def createAlgsList(self):
ClipByExtent(), ClipByMask(), contour(), rasterize(), proximity(),
sieve(), fillnodata(), ExtractProjection(), gdal2xyz(),
hillshade(), slope(), aspect(), tri(), tpi(), roughness(),
ColorRelief(),
# ----- OGR tools -----
OgrInfo(), Ogr2Ogr(), OgrSql(),
]

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