geotiff files created by gdal_translate sometimes missing origin and pixel size

[sgrewe]

I am trying to translate .png files to geotiff files with gdal_translate, assigning the georeferenced bounds of the output file with the -a_ullr ulx uly lrx lry option. Sometimes this is working, but when the uly coordinate specified in -a_ullr is 0, it is not working.

this is not working (in the output file 0.tif there is no origin, no pixel size, wrong sign of the y corner coordinates and center):

gdal_translate -of GTiff -a_ullr 0 0 256 -256 0.png 0.tif

gdalinfo 0.png Driver: PNG/Portable Network Graphics Files: 0.png Size is 256, 256 Coordinate System is `' Image Structure Metadata:

INTERLEAVE=PIXEL

Corner Coordinates: Upper Left ( 0.0, 0.0) Lower Left ( 0.0, 256.0) Upper Right ( 256.0, 0.0) Lower Right ( 256.0, 256.0) Center ( 128.0, 128.0) Band 1 Block=256x1 Type=Byte, ColorInterp=Red Band 2 Block=256x1 Type=Byte, ColorInterp=Green Band 3 Block=256x1 Type=Byte, ColorInterp=Blue

gdalinfo 0.tif Driver: GTiff/GeoTIFF Files: 0.tif Size is 256, 256 Coordinate System is `' Image Structure Metadata:

INTERLEAVE=PIXEL

Corner Coordinates: Upper Left ( 0.0, 0.0) Lower Left ( 0.0, 256.0) Upper Right ( 256.0, 0.0) Lower Right ( 256.0, 256.0) Center ( 128.0, 128.0) Band 1 Block=256x10 Type=Byte, ColorInterp=Red Band 2 Block=256x10 Type=Byte, ColorInterp=Green Band 3 Block=256x10 Type=Byte, ColorInterp=Blue

but this is working:

gdal_translate -of GTiff -a_ullr 0 -256 256 -512 1.png 1.tif

1.png Size is 256, 256 Coordinate System is `' Image Structure Metadata:

INTERLEAVE=PIXEL

Corner Coordinates: Upper Left ( 0.0, 0.0) Lower Left ( 0.0, 256.0) Upper Right ( 256.0, 0.0) Lower Right ( 256.0, 256.0) Center ( 128.0, 128.0) Band 1 Block=256x1 Type=Byte, ColorInterp=Red Band 2 Block=256x1 Type=Byte, ColorInterp=Green Band 3 Block=256x1 Type=Byte, ColorInterp=Blue

gdalinfo 1.tif Driver: GTiff/GeoTIFF Files: 1.tif Size is 256, 256 Coordinate System is `' Origin = (0.000000000000000,-256.000000000000000) Pixel Size = (1.000000000000000,-1.000000000000000) Image Structure Metadata:

INTERLEAVE=PIXEL

Corner Coordinates: Upper Left ( 0.000, -256.000) Lower Left ( 0.000, -512.000) Upper Right ( 256.000, -256.000) Lower Right ( 256.000, -512.000) Center ( 128.000, -384.000) Band 1 Block=256x10 Type=Byte, ColorInterp=Red Band 2 Block=256x10 Type=Byte, ColorInterp=Green Band 3 Block=256x10 Type=Byte, ColorInterp=Blue

Regards, Stefan Grewe

[Even Rouault]

Fixed in trunk (r20294)