Bad Allocation when opening properties of a VRT file created with the Hillshade tool of the "Raster Terrain Analysis" core plugin

[qgib]

Author Name: Mark Giesbrecht (Mark Giesbrecht)
Original Redmine Issue: 11209
Affected QGIS version: master
Redmine category:analysis_library

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When creating a hillshade with a virtual raster output, based upon an existing virtual raster, the process completed with a 'Bad Allocation' error. End result would not display the the output, rendering was blank. Values were between nan

Input files are .dem, downloaded from Geogratis.ca

• Input filename was ElbowBasinDEM.vrt
• Output filename was ElbowBasinHillshade.vrt

Input virtual raster details are as follows:
Driver
GDAL provider
VRT
Virtual Raster
Dataset Description
D:/GIS/ERWP/DEMS For Elbow River/ElbowBasinDEM.vrt
Band 1
STATISTICS_MAXIMUM=2995
STATISTICS_MEAN=1581.2133159829
STATISTICS_MINIMUM=1036
STATISTICS_STDDEV=412.1300841309
Dimensions
X: 7201 Y: 6001 Bands: 1
Origin
-115.5,51.2501
Pixel Size
0.000208333,-0.000208333
No Data Value
-32767
Data Type
Int16 - Sixteen bit signed integer
Pyramid overviews
Layer Spatial Reference System
+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs
Layer Extent (layer original source projection)
-115.5001041666666737,49.9998958333333334 : -113.9998958333333405,51.2501041666666666
Band
Band 1
Band No
1
No Stats
No stats collected yet

Output virtual raster details are as follows:
_Driver
GDAL provider
VRT
Virtual Raster
Dataset Description
D:/GIS/ERWP/Elbow River Watershed - Geogratis/ElbowBasinHillshade.vrt
Band 1
Dimensions
X: 7201 Y: 6001 Bands: 1
Origin
-115.5,51.2501
Pixel Size
0.000208333,-0.000208333
No Data Value
-9999
Data Type
Float32 - Thirty two bit floating point
Pyramid overviews
Layer Spatial Reference System
+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs
Layer Extent (layer original source projection)
-115.5001041666666737,49.9998958333333334 : -113.9998958333333405,51.2501041666666666
Band
Band 1
Band No
1
No Stats
No stats collected yet
_

Another aside, the first virtual raster output (ElbowBasinDEM.vrt) would not display until the project was saved, then re-opened the .qgs project.

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• QGIS_240_VirtualRaster_BadAllocation_1.PNG (Mark Giesbrecht)
• QGIS_240_VirtualRaster_BadAllocation_2.PNG (Mark Giesbrecht)
• QGIS_240_VirtualRaster_BadAllocation_3.PNG (Mark Giesbrecht)

[qgib]

Author Name: Giovanni Manghi (@gioman)

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The resulting vrt file (using the QGIS core "Raster Terrain Analysis plugin") does not seems right, but the truth is that I'm not sure that for such operations (for example using the hillshade tool in the "raster -> analysis -> dem" menu) the vrt should be allowed as output format.

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• version was changed from 2.4.0 to master
• subject was changed from Bad Allocation Error when creating Virtual Raster to Bad Allocation when opening properties of a VRT file created with the Hillshade tool of the "Raster Terrain Analysis" core plugin
• category_id was changed from Rasters to 119
• operating_system was changed from Windows 7 64bit to

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• category_id was changed from 119 to Analysis library

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• fixed_version_id was configured as Version 3.0

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• regression was configured as 0
• easy_fix was configured as 0

[qgib]

Author Name: Giovanni Manghi (@gioman)

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End of life notice: QGIS 2.18 LTR

Source:
http://blog.qgis.org/2019/03/09/end-of-life-notice-qgis-2-18-ltr/

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• resolution was changed from to end of life
• status_id was changed from Open to Closed