add gdal_rasterize tool to easily allow write over existing raster

python/plugins/processing/algs/gdal/GdalOgrAlgorithmProvider.py

@@ -66,6 +66,7 @@ from GridNearest import GridNearest
 from GridDataMetrics import GridDataMetrics
 from gdaltindex import gdaltindex
 from gdalcalc import gdalcalc
+from rasterize_over import rasterize_over
 
 from ogr2ogr import Ogr2Ogr
 from ogr2ogrclip import Ogr2OgrClip
@@ -131,7 +132,7 @@ class GdalOgrAlgorithmProvider(AlgorithmProvider):
             sieve(), fillnodata(), ExtractProjection(), gdal2xyz(),
             hillshade(), slope(), aspect(), tri(), tpi(), roughness(),
             ColorRelief(), GridInvDist(), GridAverage(), GridNearest(),
-            GridDataMetrics(), gdaltindex(), gdalcalc(),
+            GridDataMetrics(), gdaltindex(), gdalcalc(), rasterize_over(),
             # ----- OGR tools -----
             OgrInfo(), Ogr2Ogr(), Ogr2OgrClip(), Ogr2OgrClipExtent(),
             Ogr2OgrToPostGis(), Ogr2OgrToPostGisList(), Ogr2OgrPointsOnLines(),

python/plugins/processing/algs/gdal/rasterize_over.py

@@ -0,0 +1,75 @@
+# -*- coding: utf-8 -*-
+
+"""
+***************************************************************************
+    rasterize_over.py
+    ---------------------
+    Date                 : September 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__ = 'September 2013'
+__copyright__ = '(C) 2013, Alexander Bruy'
+
+# This will get replaced with a git SHA1 when you do a git archive
+
+__revision__ = '$Format:%H$'
+
+import os
+
+from processing.algs.gdal.GdalAlgorithm import GdalAlgorithm
+from processing.core.parameters import ParameterVector
+from processing.core.parameters import ParameterRaster
+from processing.core.parameters import ParameterTableField
+from processing.core.parameters import ParameterSelection
+from processing.core.outputs import OutputRaster
+from processing.algs.gdal.OgrAlgorithm import OgrAlgorithm
+from processing.algs.gdal.GdalUtils import GdalUtils
+from processing.tools.system import isWindows
+
+
+class rasterize_over(OgrAlgorithm):
+
+    INPUT = 'INPUT'
+    INPUT_RASTER = 'INPUT_RASTER'
+    FIELD = 'FIELD'
+
+    def commandLineName(self):
+        return "gdalogr:rasterize_over"
+
+    def defineCharacteristics(self):
+        self.name = 'Rasterize (write over existing raster)'
+        self.group = '[GDAL] Conversion'
+        self.addParameter(ParameterVector(self.INPUT, self.tr('Input layer')))
+        self.addParameter(ParameterTableField(self.FIELD,
+            self.tr('Attribute field'), self.INPUT))
+        self.addParameter(ParameterRaster(self.INPUT_RASTER,
+            self.tr('Existing raster layer'), False))
+
+    def processAlgorithm(self, progress):
+        inLayer = self.getParameterValue(self.INPUT)
+        ogrLayer = self.ogrConnectionString(inLayer)[1:-1]
+        inRasterLayer = self.getParameterValue(self.INPUT_RASTER)
+        ogrRasterLayer = self.ogrConnectionString(inRasterLayer)[1:-1]
+
+        arguments = []
+        arguments.append('-a')
+        arguments.append(str(self.getParameterValue(self.FIELD)))
+
+        arguments.append('-l')
+        arguments.append(self.ogrLayerName(inLayer))
+        arguments.append(ogrLayer)
+        arguments.append(ogrRasterLayer)
+
+        GdalUtils.runGdal(['gdal_rasterize',
+                          GdalUtils.escapeAndJoin(arguments)], progress)