more GDAL a_nodata fixes, for sake of uniformity

Giovanni Manghi · rldhont · commit 71fb115e2bb5 · 2016-04-26T13:49:13.000+02:00
diff --git a/python/plugins/processing/algs/gdal/ClipByMask.py b/python/plugins/processing/algs/gdal/ClipByMask.py
@@ -73,7 +73,7 @@ def defineCharacteristics(self):
                                           [ParameterVector.VECTOR_TYPE_POLYGON]))
         self.addParameter(ParameterString(self.NO_DATA,
                                           self.tr("Nodata value, leave blank to take the nodata value from input"),
-                                          '-9999'))
+                                          '', optional=True))
         self.addParameter(ParameterBoolean(self.ALPHA_BAND,
                                            self.tr('Create and output alpha band'), False))
         self.addParameter(ParameterBoolean(self.CROP_TO_CUTLINE,
diff --git a/python/plugins/processing/algs/gdal/gdalcalc.py b/python/plugins/processing/algs/gdal/gdalcalc.py
@@ -92,7 +92,7 @@ def defineCharacteristics(self):
         self.addParameter(ParameterString(self.FORMULA,
                                           self.tr('Calculation in gdalnumeric syntax using +-/* or any numpy array functions (i.e. logical_and())'), 'A*2', optional=False))
         self.addParameter(ParameterString(self.NO_DATA,
-                                          self.tr('Set output nodata value'), '-9999'))
+                                          self.tr('Set output nodata value'), '', optional=True))
         self.addParameter(ParameterSelection(self.RTYPE,
                                              self.tr('Output raster type'), self.TYPE, 5))
         #self.addParameter(ParameterBoolean(
diff --git a/python/plugins/processing/algs/gdal/rasterize.py b/python/plugins/processing/algs/gdal/rasterize.py
@@ -85,7 +85,7 @@ def defineCharacteristics(self):
                                          self.TYPE, 5))
         params.append(ParameterString(self.NO_DATA,
                                       self.tr("Nodata value"),
-                                      '-9999'))
+                                      '', optional=True))
         params.append(ParameterSelection(self.COMPRESS,
                                          self.tr('GeoTIFF options. Compression type:'), self.COMPRESSTYPE, 4))
         params.append(ParameterNumber(self.JPEGCOMPRESSION,
diff --git a/python/plugins/processing/algs/gdal/translate.py b/python/plugins/processing/algs/gdal/translate.py
@@ -76,7 +76,7 @@ def defineCharacteristics(self):
                                            self.tr('Output size is a percentage of input size'), True))
         self.addParameter(ParameterString(self.NO_DATA,
                                           self.tr("Nodata value, leave blank to take the nodata value from input"),
-                                          ''))
+                                          '', optional=True))
         self.addParameter(ParameterSelection(self.EXPAND,
                                              self.tr('Expand'), ['none', 'gray', 'rgb', 'rgba']))
         self.addParameter(ParameterCrs(self.SRS,
diff --git a/python/plugins/processing/algs/gdal/warp.py b/python/plugins/processing/algs/gdal/warp.py
@@ -69,7 +69,7 @@ def defineCharacteristics(self):
                                        self.tr('Destination SRS'), ''))
         self.addParameter(ParameterString(self.NO_DATA,
                                           self.tr("Nodata value, leave blank to take the nodata value from input"),
-                                          '-9999'))
+                                          '', optional=True))
         self.addParameter(ParameterNumber(self.TR,
                                           self.tr('Output file resolution in target georeferenced units (leave 0 for no change)'),
                                           0.0, None, 0.0))
