Merge raster layers error in Processing

[qgib]

Author Name: Paolo Cavallini (@pcav)
Original Redmine Issue: 11431
Affected QGIS version: master
Redmine category:processing/saga
Assignee: Victor Olaya

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Apparently an option has changed in SAGA:

Algorithm Merge raster layers starting...
grid_tools "Merging" -GRIDS "/tmp/processing/df59e75a8bc14e51a2e0f9e34d14f6c2/OUTPUT.tif.sgrd;/tmp/processing/4295320f57714bb69d8d7378e1b93eed/Outputlayer.sgrd" -TYPE 7 -INTERPOL 0 -OVERLAP 0 -MERGED "/tmp/processing/e279770e3c4243fcb2bc0ef06204f0cf/MERGED.tif.sgrd"
io_gdal 1 -GRIDS "/tmp/processing/e279770e3c4243fcb2bc0ef06204f0cf/MERGED.tif.sgrd" -FORMAT 1 -TYPE 0 -FILE "/tmp/processing/e279770e3c4243fcb2bc0ef06204f0cf/MERGED.tif"
Unknown option 'GRIDS'

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library path: /usr/lib/x86_64-linux-gnu/saga/libgrid_tools.so
library name: Grid - Tools
tool name : Resampling
author : O.Conrad (c) 2003

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Usage: saga_cmd grid_tools 0 -INPUT [-INPUT_ADD ] [-OUTPUT_ADD ] [-KEEP_TYPE] [-TARGET ] [-SCALE_UP_METHOD ] [-SCALE_DOWN_METHOD ] [-USER_XMIN ] [-USER_XMAX ] [-USER_YMIN ] [-USER_YMAX ] [-USER_SIZE ] [-USER_FIT ] [-USER_GRID ] [-GRID_GRID ]
-INPUT: Grid
Grid (input)
-INPUT_ADD: Additional Grids
Grid list (optional input)
-OUTPUT_ADD: Additional Grids
Grid list (optional output)
-KEEP_TYPE Preserve Data Type
Boolean
Default: 0
-TARGET: Target Grid
Choice
Available Choices:
[0] user defined
[1] grid
Default: 0
-SCALE_UP_METHOD: Interpolation Method
Choice
Available Choices:
[0] Nearest Neighbor
[1] Bilinear Interpolation
[2] Inverse Distance Interpolation
[3] Bicubic Spline Interpolation
[4] B-Spline Interpolation
[5] Mean Value
[6] Mean Value (cell area weighted)
[7] Minimum Value
[8] Maximum Value
[9] Majority
Default: 6
-SCALE_DOWN_METHOD: Interpolation Method
Choice
Available Choices:
[0] Nearest Neighbor
[1] Bilinear Interpolation
[2] Inverse Distance Interpolation
[3] Bicubic Spline Interpolation
[4] B-Spline Interpolation
Default: 4
-USER_XMIN: Left
Floating point
Default: 0.000000
-USER_XMAX: Right
Floating point
Default: 0.000000
-USER_YMIN: Bottom
Floating point
Default: 0.000000
-USER_YMAX: Top
Floating point
Default: 0.000000
-USER_SIZE: Cellsize
Floating point
Minimum: 0.000000
Default: 1.000000
-USER_FIT: Fit
Choice
Available Choices:
[0] nodes
[1] cells
Default: 0
-USER_GRID: Grid
Data Object (optional output)
-GRID_GRID: Grid
Grid (optional input)
Error: Grid file could not be opened.
Error: executing tool [GDAL: Export Raster]

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library path: /usr/lib/x86_64-linux-gnu/saga/libio_gdal.so
library name: Import/Export - GDAL/OGR
tool name : GDAL: Export Raster
author : O.Conrad (c) 2007

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Load grid: /tmp/processing/e279770e3c4243fcb2bc0ef06204f0cf/MERGED.tif.sgrd...
failed
GDAL: Export Raster: could not initialize data objects
Output di conversione
Caricamento layer
Algorithm Merge raster layers finished

[qgib]

Author Name: Giovanni Manghi (@gioman)

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The tool changed name in SAGA 2.1.2, now is "mosaiking", but the tool code is [3] as the previous "merging".

As the tool "merging" does not exist anymore the above error message actually shows the usage of tool [0] and this can confuse a lot...

I noticed also that in SAGA 2.1.2 there are two more grid_tools modules compared to 2.1.0 and three more compared to 2.0.8.

I'm working to fix all this issues.

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• version was changed from 2.4.0 to master

[qgib]

Author Name: Giovanni Manghi (@gioman)

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see

#1636

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• resolution was changed from to fixed/implemented
• status_id was changed from Open to Closed