Support GRASS rasters as inputs in Processing

[qgib]

Author Name: Anita Graser (@anitagraser)
Original Redmine Issue: 7727

Redmine category:processing/core
Assignee: Victor Olaya

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As reported: http://osgeo-org.1560.x6.nabble.com/Should-it-be-possible-to-use-GRASS-rasters-in-Sextante-td5048075.html

I'm working with QGIS sample data GRASS datset. Loaded the airports and
gtopo30. I can select the airport layer in Sextante dialogs but not
gtopo30.

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Related issue(s): #21457 (duplicates)
Redmine related issue(s): 13408

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[qgib]

Author Name: Victor Olaya (@volaya)

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This is a complex issue.

GRASS layers cannot be used in their native format by other apps like SAGA, OTB, etc. They have to be converted. But to convert a layer when its needed, SEXTANTE uses GDAL. GDAL, however, does not support GRASS layers, so the only way of doing it is to load the layer into memory and then write it to a GDAL-supported format. This will not work for large layers.

Finding a solution for all cases doesn't seem to be easy... I would like to think a bit more about this before adding a solutino that will not work in many cases, which will make SEXTANTE unstable in case of using GRASS layers.

Ideas and comments are welcome

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• status_id was changed from Open to Feedback

[qgib]

Author Name: Paolo Cavallini (@pcav)

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This is why libgdal1-1.9.0-grass exists

[qgib]

Author Name: pvanbosgeo - (pvanbosgeo -)

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Any development on this?

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• crashes_corrupts_data was configured as 0
• version was configured as 2.4.0
• category_id removed 63
• project_id was changed from 78 to 17

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• category_id was configured as Processing/Core

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• tracker_id was changed from 1 to 2
• priority_id was changed from High to Normal
• subject was changed from Can't use GRASS rasters to Support GRASS rasters as inputs in Processing

[qgib]

Author Name: Paolo Cavallini (@pcav)

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Apparently, GRASS rasters are supported by GDAL:

gdalinfo --formats | grep -i grass
GRASSASCIIGrid (rov): GRASS ASCII Grid

[qgib]

Author Name: Paolo Cavallini (@pcav)

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So, it seems that GRASS rasters are simply filtered out. In this case, the fix would be trivial.

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• easy_fix was configured as 0

[github-actions]

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[github-actions]

While we hate to see this happen, this issue has been automatically closed because it has not had any activity in the last 42 days despite being marked as feedback. If this issue should be reconsidered, please follow the guidelines in the previous comment and reopen this issue.
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