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pyqgis: using gdalogr:rastercalculator not working
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I have an Int16 - 16 bit GeoTiff and would like to do a simple calculation.
Using the GUI in QGIS (raster calculator) it works without problems. The expression in the raster calculator is: Raster_Image * 0.04 - 273.15
I want to do the calculation via pyqgis. For this I would like to use the process gdalogr: rastercalculator.
I tried the following:
import processing
# Get actual raster layer (GeoTiff)
layer = iface.activeLayer();
output = processing.runalg('gdalogr:rastercalculator',
layer, #INPUT_A <ParameterRaster>
'1', #BAND_A <ParameterString>
None, #INPUT_B <ParameterRaster>
'', #BAND_B <ParameterString>
None, #INPUT_C <ParameterRaster>
'', #BAND_C <ParameterString>
None, #INPUT_D <ParameterRaster>
'', #BAND_D <ParameterString>
None, #INPUT_E <ParameterRaster>
'', #BAND_E <ParameterString>
None, #INPUT_F <ParameterRaster>
'', #BAND_F <ParameterString>
'A*0.04-273.15', #FORMULA <ParameterString>
'', #NO_DATA <ParameterString>
'1', #RTYPE <ParameterSelection>
'', #EXTRA <ParameterString>
None) #OUTPUT <OutputRaster>
rLayer= QgsRasterLayer(output['OUTPUT'],'result')
print rLayer.isValid()
The calculated raster is not valid. I just do not understand what I'm doing wrong.
pyqgis qgis-2 gdalogr
asked 2 hours ago
eftaseftas
347113
add a comment |
I have an Int16 - 16 bit GeoTiff and would like to do a simple calculation.
Using the GUI in QGIS (raster calculator) it works without problems. The expression in the raster calculator is: Raster_Image * 0.04 - 273.15
I want to do the calculation via pyqgis. For this I would like to use the process gdalogr: rastercalculator.
I tried the following:
import processing
# Get actual raster layer (GeoTiff)
layer = iface.activeLayer();
output = processing.runalg('gdalogr:rastercalculator',
layer, #INPUT_A <ParameterRaster>
'1', #BAND_A <ParameterString>
None, #INPUT_B <ParameterRaster>
'', #BAND_B <ParameterString>
None, #INPUT_C <ParameterRaster>
'', #BAND_C <ParameterString>
None, #INPUT_D <ParameterRaster>
'', #BAND_D <ParameterString>
None, #INPUT_E <ParameterRaster>
'', #BAND_E <ParameterString>
None, #INPUT_F <ParameterRaster>
'', #BAND_F <ParameterString>
'A*0.04-273.15', #FORMULA <ParameterString>
'', #NO_DATA <ParameterString>
'1', #RTYPE <ParameterSelection>
'', #EXTRA <ParameterString>
None) #OUTPUT <OutputRaster>
rLayer= QgsRasterLayer(output['OUTPUT'],'result')
print rLayer.isValid()
The calculated raster is not valid. I just do not understand what I'm doing wrong.
pyqgis qgis-2 gdalogr
asked 2 hours ago
eftaseftas
347113
add a comment |
I have an Int16 - 16 bit GeoTiff and would like to do a simple calculation.
Using the GUI in QGIS (raster calculator) it works without problems. The expression in the raster calculator is: Raster_Image * 0.04 - 273.15
I want to do the calculation via pyqgis. For this I would like to use the process gdalogr: rastercalculator.
I tried the following:
import processing
# Get actual raster layer (GeoTiff)
layer = iface.activeLayer();
output = processing.runalg('gdalogr:rastercalculator',
layer, #INPUT_A <ParameterRaster>
'1', #BAND_A <ParameterString>
None, #INPUT_B <ParameterRaster>
'', #BAND_B <ParameterString>
None, #INPUT_C <ParameterRaster>
'', #BAND_C <ParameterString>
None, #INPUT_D <ParameterRaster>
'', #BAND_D <ParameterString>
None, #INPUT_E <ParameterRaster>
'', #BAND_E <ParameterString>
None, #INPUT_F <ParameterRaster>
'', #BAND_F <ParameterString>
'A*0.04-273.15', #FORMULA <ParameterString>
'', #NO_DATA <ParameterString>
'1', #RTYPE <ParameterSelection>
'', #EXTRA <ParameterString>
None) #OUTPUT <OutputRaster>
rLayer= QgsRasterLayer(output['OUTPUT'],'result')
print rLayer.isValid()
The calculated raster is not valid. I just do not understand what I'm doing wrong.
pyqgis qgis-2 gdalogr
asked 2 hours ago
eftaseftas
347113
I have an Int16 - 16 bit GeoTiff and would like to do a simple calculation.
Using the GUI in QGIS (raster calculator) it works without problems. The expression in the raster calculator is: Raster_Image * 0.04 - 273.15
I want to do the calculation via pyqgis. For this I would like to use the process gdalogr: rastercalculator.
I tried the following:
import processing
# Get actual raster layer (GeoTiff)
layer = iface.activeLayer();
output = processing.runalg('gdalogr:rastercalculator',
layer, #INPUT_A <ParameterRaster>
'1', #BAND_A <ParameterString>
None, #INPUT_B <ParameterRaster>
'', #BAND_B <ParameterString>
None, #INPUT_C <ParameterRaster>
'', #BAND_C <ParameterString>
None, #INPUT_D <ParameterRaster>
'', #BAND_D <ParameterString>
None, #INPUT_E <ParameterRaster>
'', #BAND_E <ParameterString>
None, #INPUT_F <ParameterRaster>
'', #BAND_F <ParameterString>
'A*0.04-273.15', #FORMULA <ParameterString>
'', #NO_DATA <ParameterString>
'1', #RTYPE <ParameterSelection>
'', #EXTRA <ParameterString>
None) #OUTPUT <OutputRaster>
rLayer= QgsRasterLayer(output['OUTPUT'],'result')
print rLayer.isValid()
The calculated raster is not valid. I just do not understand what I'm doing wrong.
pyqgis qgis-2 gdalogr
pyqgis qgis-2 gdalogr
asked 2 hours ago
eftaseftas
347113
asked 2 hours ago
eftaseftas
347113
asked 2 hours ago
eftaseftas
347113
asked 2 hours ago
eftaseftas
347113
asked 2 hours ago
eftaseftas
347113
347113
add a comment |
add a comment |
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