Merge pull request #1880 from gioman/processing_fix_gdal_a_nodata

fix a_nodata parameter in gdal processing

Author: alexbruy

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

@@ -49,8 +49,8 @@ def defineCharacteristics(self):
         self.addParameter(ParameterRaster(
             self.INPUT, self.tr('Input layer'), False))
         self.addParameter(ParameterString(self.NO_DATA,
-            self.tr("Nodata value, leave as 'none' to take the nodata value from input"),
-            'none'))
+            self.tr("Nodata value, leave blank to take the nodata value from input"),
+            ''))
         self.addParameter(ParameterExtent(self.PROJWIN, self.tr('Clipping extent')))
         self.addParameter(ParameterString(self.EXTRA,
             self.tr('Additional creation parameters'), '', optional=True))
@@ -65,8 +65,9 @@ def processAlgorithm(self, progress):
         arguments = []
         arguments.append('-of')
         arguments.append(GdalUtils.getFormatShortNameFromFilename(out))
-        arguments.append('-a_nodata')
-        arguments.append(noData)
+        if len(noData) > 0:
+            arguments.append('-a_nodata')
+            arguments.append(noData)
 
         regionCoords = projwin.split(',')
         arguments.append('-projwin')

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

@@ -68,8 +68,8 @@ def defineCharacteristics(self):
         self.addParameter(ParameterBoolean(self.OUTSIZE_PERC,
             self.tr('Output size is a percentage of input size'), True))
         self.addParameter(ParameterString(self.NO_DATA,
-            self.tr("Nodata value, leave as 'none' to take the nodata value from input"),
-            'none'))
+            self.tr("Nodata value, leave blank to take the nodata value from input"),
+            ''))
         self.addParameter(ParameterSelection(self.EXPAND,
             self.tr('Expand'), ['none', 'gray', 'rgb', 'rgba']))
         self.addParameter(ParameterCrs(self.SRS,
@@ -111,8 +111,9 @@ def processAlgorithm(self, progress):
             arguments.append('-outsize')
             arguments.append(outsize)
             arguments.append(outsize)
-        arguments.append('-a_nodata')
-        arguments.append(noData)
+        if len(noData) > 0:
+            arguments.append('-a_nodata')
+            arguments.append(noData)
         if expand != 'none':
             arguments.append('-expand')
             arguments.append(expand)