Jan,
You may have some difficulties with creating a ECW output format with
gdalwarp, I would try GeoTiff first. Also 3 band ECW have issues with
creation of compression artifacts in nodata areas so translating the
GeoTiff to ECW may not work as expected.
Regards
On 7 November 2011 13:36, Chaita
Jan,
You can use the -srcnodata and -dstalpha options of gdalwarp[1] to set
nodata values and create an alpha band to the image. You will have to give
the value of the black borders with the -srcnodata option.
[1]: http://www.gdal.org/gdalwarp.html
On Mon, Nov 7, 2011 at 5:33 PM, Jan Tappenbeck
Hi !
i have a image with following data:
C:\Program Files (x86)\FWTools2.4.7>gdalinfo "[Path]\trans_a.tif"
Driver: GTiff/GeoTIFF
Files: D:\brumi\VG_Bruchmuehlbach-Miesau_DOP\geotiff\trans_a.tif
Size is 10390, 10390
Coordinate System is:
PROJCS["DHDN / 3-degree Gauss-Kruger zone 2",
GEOGCS
