No output from GRASS 7 r.reclass in Processing Python scriptNo output generated with “r.drain” GRASS...

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No output from GRASS 7 r.reclass in Processing Python script


No output generated with “r.drain” GRASS moduler.viewshed Raster map not foundspurious “.tif Exists” errors on QGIS Python script processingPyQGIS GRASS r.reclass from Processing without resultAlgorithm r.reclass in QGIS gives same results with different reclass rulesQGIS Processing input list of numbers?QGIS 3 r.texture no outputQGIS - Struggling with r.reclass, North must be larger than south, etc - error log in postDEM File “not found” Error when running r.watershed with Processing Toolbox in QGIS 3.4.2 with GRASSUnable to load output layer from Python algorithm in QGIS 3













0















I want to run the r.reclass tool in python on a raster layer to reclassify 1 value (and leave the rest the way they are).



Here is my best attempt so far, after trying to reference documentation and other examples. Here is my code:



import processing

input_raster = QgsRasterLayer('/Users/ep9k/Desktop/Key-LogEcovaluator/Rasters/AestheticMax.tif', 'raster')
output_raster = '/Users/ep9k/Desktop/OutputReclass.tif'
rules_file = '/Users/ep9k/Desktop/reclassrules.txt'


parameters = {'Input' : input_raster,
'rules' : rules_file,
'Output' : output_raster,
'GRASS_REGION_PARAMETER' : '1277290, 1314314, -14004, 11845', #this is the exent of my raster layer
'GRASS_REGION_CELLSIZE_PARAMETER' : 0
}

processing.runAndLoadResults('grass7:r.reclass', parameters)


I run the script and I don't get any errors, but nothing happens. No output, nothing is reclassified. I think I am missing something obvious here.



I get the help docs by running the following in the console:



processing.algorithmHelp("grass7:r.reclass")


I am confused by 2 of the input parameters. Specifically GRASS_RASTER_FORMAT_OPT and GRASS_RASTER_FORMAT_META. Are these required?










share|improve this question




















  • 1





    It looks like you're using the older 2.x API under QGIS 3?

    – ndawson
    yesterday
















0















I want to run the r.reclass tool in python on a raster layer to reclassify 1 value (and leave the rest the way they are).



Here is my best attempt so far, after trying to reference documentation and other examples. Here is my code:



import processing

input_raster = QgsRasterLayer('/Users/ep9k/Desktop/Key-LogEcovaluator/Rasters/AestheticMax.tif', 'raster')
output_raster = '/Users/ep9k/Desktop/OutputReclass.tif'
rules_file = '/Users/ep9k/Desktop/reclassrules.txt'


parameters = {'Input' : input_raster,
'rules' : rules_file,
'Output' : output_raster,
'GRASS_REGION_PARAMETER' : '1277290, 1314314, -14004, 11845', #this is the exent of my raster layer
'GRASS_REGION_CELLSIZE_PARAMETER' : 0
}

processing.runAndLoadResults('grass7:r.reclass', parameters)


I run the script and I don't get any errors, but nothing happens. No output, nothing is reclassified. I think I am missing something obvious here.



I get the help docs by running the following in the console:



processing.algorithmHelp("grass7:r.reclass")


I am confused by 2 of the input parameters. Specifically GRASS_RASTER_FORMAT_OPT and GRASS_RASTER_FORMAT_META. Are these required?










share|improve this question




















  • 1





    It looks like you're using the older 2.x API under QGIS 3?

    – ndawson
    yesterday














0












0








0








I want to run the r.reclass tool in python on a raster layer to reclassify 1 value (and leave the rest the way they are).



Here is my best attempt so far, after trying to reference documentation and other examples. Here is my code:



import processing

input_raster = QgsRasterLayer('/Users/ep9k/Desktop/Key-LogEcovaluator/Rasters/AestheticMax.tif', 'raster')
output_raster = '/Users/ep9k/Desktop/OutputReclass.tif'
rules_file = '/Users/ep9k/Desktop/reclassrules.txt'


parameters = {'Input' : input_raster,
'rules' : rules_file,
'Output' : output_raster,
'GRASS_REGION_PARAMETER' : '1277290, 1314314, -14004, 11845', #this is the exent of my raster layer
'GRASS_REGION_CELLSIZE_PARAMETER' : 0
}

processing.runAndLoadResults('grass7:r.reclass', parameters)


I run the script and I don't get any errors, but nothing happens. No output, nothing is reclassified. I think I am missing something obvious here.



I get the help docs by running the following in the console:



processing.algorithmHelp("grass7:r.reclass")


I am confused by 2 of the input parameters. Specifically GRASS_RASTER_FORMAT_OPT and GRASS_RASTER_FORMAT_META. Are these required?










share|improve this question
















I want to run the r.reclass tool in python on a raster layer to reclassify 1 value (and leave the rest the way they are).



Here is my best attempt so far, after trying to reference documentation and other examples. Here is my code:



import processing

input_raster = QgsRasterLayer('/Users/ep9k/Desktop/Key-LogEcovaluator/Rasters/AestheticMax.tif', 'raster')
output_raster = '/Users/ep9k/Desktop/OutputReclass.tif'
rules_file = '/Users/ep9k/Desktop/reclassrules.txt'


parameters = {'Input' : input_raster,
'rules' : rules_file,
'Output' : output_raster,
'GRASS_REGION_PARAMETER' : '1277290, 1314314, -14004, 11845', #this is the exent of my raster layer
'GRASS_REGION_CELLSIZE_PARAMETER' : 0
}

processing.runAndLoadResults('grass7:r.reclass', parameters)


I run the script and I don't get any errors, but nothing happens. No output, nothing is reclassified. I think I am missing something obvious here.



I get the help docs by running the following in the console:



processing.algorithmHelp("grass7:r.reclass")


I am confused by 2 of the input parameters. Specifically GRASS_RASTER_FORMAT_OPT and GRASS_RASTER_FORMAT_META. Are these required?







qgis pyqgis grass qgis-3 qgis-processing






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited 4 mins ago









underdark

68.3k13177342




68.3k13177342










asked 2 days ago









Erich PurpurErich Purpur

314114




314114








  • 1





    It looks like you're using the older 2.x API under QGIS 3?

    – ndawson
    yesterday














  • 1





    It looks like you're using the older 2.x API under QGIS 3?

    – ndawson
    yesterday








1




1





It looks like you're using the older 2.x API under QGIS 3?

– ndawson
yesterday





It looks like you're using the older 2.x API under QGIS 3?

– ndawson
yesterday










0






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