Ticket #3632 (closed bug: invalid)
incorrect reprojection on windows (7), fine on linux
|Reported by:||nirvn||Owned by:||nobody|
|Priority:||critical: causes crash or data corruption||Milestone:||Version 1.7.0|
|Must Fix for Release:||Yes||Awaiting user input:||no|
Description (last modified by jef) (diff)
There's an on the fly reprojection issue going on with QGIS on windows platform (working fine under linux, untested on mac).
On the windows version of QGIS, a WGS84 datum layer and its Indian 1960 48N datum equivalent fails to project on top of each other, ending up in a +450 meter (!) difference in location. (see screenshot attached)
I've been noticing this for quite some time but didn't find a good way to explain the issue until now.
Steps to reveal issue:
- Create a new program, set the CRS to UTM Indian 1960 48N and activate on the fly reprojection.
- Load the raster @ http://licadho-cambodia.org/qgis/ASTGTM_N11E103.zip (it's a simple aster gdem geotiff) into the project
- Using the gdal's wrap tool, transform the astgm_n11e103_dem.tiff's WGS84 datum to Indian 1960 48N datum
- Load the generated raster
- Apply the this colormap ( http://licadho-cambodia.org/qgis/bugramp.txt) to both rasters to make it easier to observe the issue
Loading the two rasters into the linux version of QGIS will render just fine.