Bug report #11209: Bad Allocation when opening properties of a VRT file created with the Hillshade tool of the "Raster Terrain Analysis" core plugin - QGIS Application - QGIS Issue Tracking

Bug report #11209

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

Added by Mark Giesbrecht about 10 years ago. Updated over 5 years ago.

Status:	Closed
Priority:	Normal
Assignee:	-
Category:	Analysis library
Affected QGIS version:	master	Regression?:	No
Operating System:		Easy fix?:	No
Pull Request or Patch supplied:	No	Resolution:	end of life
Crashes QGIS or corrupts data:	No	Copied to github as #:	19519

Description

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.

QGIS_240_VirtualRaster_BadAllocation_1.PNG - Input parameters (37.1 KB) Mark Giesbrecht, 2014-09-15 08:08 PM

QGIS_240_VirtualRaster_BadAllocation_2.PNG - Bad Allocation error (8.98 KB) Mark Giesbrecht, 2014-09-15 08:08 PM

QGIS_240_VirtualRaster_BadAllocation_3.PNG - Legend output providing range of values (4.82 KB) Mark Giesbrecht, 2014-09-15 08:08 PM

History

#1 Updated by Giovanni Manghi about 10 years ago

Affected QGIS version changed from 2.4.0 to master
Subject 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 changed from Rasters to 119
Operating System deleted (~~Windows 7 64bit~~)

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.