[Qgis-user] Error when reprojecting a raster in QGIS

[Gerardo Jimenez]

When reprojecting either a vector or a raster layer problems could arise if the layer and the project are not in the same crs. Remember that by default Qgis assumes that everything you load is  lat lon wgs84. Make sure that your raster layer and the project are in the same crs.
Hope it helps

Gerardo Jiménez Delgado
Instituto de Investigaciones Antropológicas
Universidad Nacional Autónoma de México
Ciudad Universitaria s/n
Coyoacan 04510
Mexico City
Mexico

56 22 95 16

Date: Sat, 19 Nov 2011 17:26:23 +0000
From: roderick.salisbury at gmail.com
To: qgis-user at lists.osgeo.org
Subject: [Qgis-user] Error when reprojecting a raster in QGIS

Dear all,
I get an error when trying to warp a tif file in QGIS:

ERROR 1: Too many points (35721 out of 35721) failed to transform, unable to compute output bounds.

I am using QGIS 1.7.0 Wroclaw with gdal 1.8. I am trying to warp
 from ETRS89 to HD72 EOV. There was an error in the data, with the UTM 
zone added to the eastings. That is, the x coordinates read 34327213.050
 when they should read 327213.050 in UTM zone 34N. I have tried changing
 the .tfw file but this did not help. Then I translated the tif to a 
.vrt and edited the vrt, removing the rogue 34, and fixing the extent. 
This also did not help - I still get the same error when I try to warp from the vrt, or using a tif translated form the new vrt. 
In layer properties, this new raster now has the same origin, extent and SRS
 as other similar (no error) rasters, but only this one gives the error.

How do I work this out? Any suggestions will be greatly appreciated. 

Cheers, Rod
-- 
Roderick B. Salisbury, PhD
School of Archaeology and Ancient History
University of Leicester
University Road
Leicester, LE1 7RH, UK

Mobile: +44 (0)7530 561 622



_______________________________________________
Qgis-user mailing list
Qgis-user at lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/qgis-user 		 	   		  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/qgis-user/attachments/20111120/8bcc10c3/attachment.html>