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, Chaitanya kumar CH <[email protected]> wrote: > 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 <[email protected]> > wrote: >> >> >> 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["DHDN", >> DATUM["Deutsches_Hauptdreiecksnetz", >> SPHEROID["Bessel 1841",6377397.155,299.1528128000009, >> AUTHORITY["EPSG","7004"]], >> AUTHORITY["EPSG","6314"]], >> PRIMEM["Greenwich",0], >> UNIT["degree",0.0174532925199433], >> AUTHORITY["EPSG","4314"]], >> PROJECTION["Transverse_Mercator"], >> PARAMETER["latitude_of_origin",0], >> PARAMETER["central_meridian",6], >> PARAMETER["scale_factor",1], >> PARAMETER["false_easting",2500000], >> PARAMETER["false_northing",0], >> UNIT["metre",1, >> AUTHORITY["EPSG","9001"]], >> AUTHORITY["EPSG","31466"]] >> Origin = (2601576.178792405400000,5477422.986974134100000) >> Pixel Size = (0.200049845331526,-0.200049845331526) >> Metadata: >> AREA_OR_POINT=Area >> Image Structure Metadata: >> INTERLEAVE=PIXEL >> Corner Coordinates: >> Upper Left ( 2601576.179, 5477422.987) ( 7d24'1.33"E, 49d25'34.75"N) >> Lower Left ( 2601576.179, 5475344.469) ( 7d23'59.41"E, 49d24'27.48"N) >> Upper Right ( 2603654.697, 5477422.987) ( 7d25'44.45"E, 49d25'33.49"N) >> Lower Right ( 2603654.697, 5475344.469) ( 7d25'42.50"E, 49d24'26.22"N) >> Center ( 2602615.438, 5476383.728) ( 7d24'51.92"E, 49d25'0.49"N) >> Band 1 Block=10390x1 Type=Byte, ColorInterp=Red >> Band 2 Block=10390x1 Type=Byte, ColorInterp=Green >> Band 3 Block=10390x1 Type=Byte, ColorInterp=Blue >> >> there are black arrows at the border (by transformation) - is it possible >> to make i transparency ? >> >> how? >> >> gdal_translate -of ECW old_image.tif new_image.ecw >> >> tells that is unpossible !!! >> >> can you help me ? >> >> regards Jan :-) >> >> >> _______________________________________________ >> gdal-dev mailing list >> [email protected] >> http://lists.osgeo.org/mailman/listinfo/gdal-dev > > > > -- > Best regards, > Chaitanya kumar CH. > > +91-9494447584 > 17.2416N 80.1426E > > _______________________________________________ > gdal-dev mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/gdal-dev > _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
