Algorithm fails (not found) : gdalogr:warpreproject

Question

I am using the code in "QGIS Python Programming Cookbook", testing the code to learn about programming in QGIS. But when I try to reproject a raster, I get the error: Error: Wrong number of parameters. When I type in processing.alghelp("gdalogr:warpreproject") it returns "Algorithm not found". Here is my code:

import processing
from processing.core.Processing import Processing
from qgis.core import *
from qgis.gui import *
Processing.initialize()
Processing.updateAlgsList()
#load a raster layer and set a COORDINATE SYSTEM
rasterLyr = QgsRasterLayer("G:\...\INPUT.ecw","MTN50")
print rasterLyr.isValid()
crs = QgsCoordinateReferenceSystem(25830, QgsCoordinateReferenceSystem.EpsgCrsId)
rasterLyr.setCrs(crs)
QgsMapLayerRegistry.instance().addMapLayers([rasterLyr])
#now, REPROJECT
processing.runalg("gdalogr:warpreproject", rasterLyr, "EPSG:25830", "EPSG:3722", None, 0, 0, 0, 0, 2, "0,円 C:\..\output.ecw")

I am using QGIS Essen, 2.14. Is it a problem of using a code that isn't updated?

Answer 1

I noticed your comment on a previous post just now. You need use warpreproject, not warpproject.

import processing
processing.alghelp("gdalogr:warpreproject")
ALGORITHM: Warp (reproject)
 INPUT <ParameterRaster>
 SOURCE_SRS <ParameterCrs>
 DEST_SRS <ParameterCrs>
 NO_DATA <ParameterString>
 TR <ParameterNumber>
 METHOD <ParameterSelection>
 RTYPE <ParameterSelection>
 COMPRESS <ParameterSelection>
 JPEGCOMPRESSION <ParameterNumber>
 ZLEVEL <ParameterNumber>
 PREDICTOR <ParameterNumber>
 TILED <ParameterBoolean>
 BIGTIFF <ParameterSelection>
 TFW <ParameterBoolean>
 EXTRA <ParameterString>
 OUTPUT <OutputRaster>

Note that it requires 16 parameters compared to your 10 :)

Tested this on QGIS 2.14.1-Essen with Processing version 2.12.2

• user64823: I have made that correction, it runs - after execfile(..) it returns true because the isValid() - but keep saying "Algorithm not found", nevertheless, I open my toolbox and Reproject is available... I keep it activated in my plugin manager. According to the number of parameters, it doesn't complain now about number of them
• Joseph: @user64823 - Are you running your code inside QGIS (i.e. the Python console)? And are you getting an output?
• user64823: I have written that code in the Text Editor of QGIS, sorry I forgot to tell so. Then, I run it and output is: True, Error: Algorithm not found Layer is loaded to the interface.
• user64823: Sorry so much, I have correct one parameter and it works (I have to input all the parameters correctly) because it now, exists. Thank you...
• user64823: I have already : processing.runalg("gdalogr:warpreproject", rasterLyr, "EPSG:25830", "EPSG:3722", -9999, 0, 0, 0, 0, 10, 0, 0, False, 0, False, "Yes", "C:\...\MYREPROJECT.ecw") And it returns :Wrong parameter value: 0 ; I follow all the types of parameters....