I get this error when trying to define a projection for a tif file in QGIS:
ERROR 1: Too many points (3249 out of 3249) failed to transform, unable to compute output bounds.
How do i work this out? any ideas? Cheers, Vasco
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This is how I worked out a similar problem (see my question here). I was trying to reproject rasters, and received the same error message; too many points etc. I had both a geotiff and *.twf for each raster. It turned out that my tifs has the UTM zone attached to the eastings, creating the wrong extent and x coordinates. The fix: I opened the GeoTiffs in a photo editor and saved them as plain tiffs, removing the metadata tags. Then I edited the .twf in notepad to remove the utm zone from the easting, and saved this with the same name as the new, non-georeferenced tiff. QGIS then looked to the twf file for the geographic info, and I was able to re-project the rasters.
There are other alternatives, including using gdal_translate to overwrite the metadata (see other answers to my original question). I hope that this is useful to others who come across this error when assigning projections or re-projecting.
I prefer you to use Quantum GIS 1.7. Since they already release a latest version 1.7 codename: Wroclaw. I love this software, by the way. This much-improved software can help you with your problem, hopefully. There should be major additional feature for projection definition.
Download them here: http://www.qgis.org/wiki/Download