Re: [gdal-dev] Aster tif files to hgt

[Jaromír Mikeš]

> Od: Jaromír Mikeš <mira.mikes at seznam.cz>

> gdal_translate -of SRTMHGT ${tile}.tif ${tile}.hgt
> 
> Warning 1: The corner coordinates of the source are not properly aligned on
> plain latitude/longitude boundaries.
> ERROR 1: Image dimensions should be 1201x1201 or 3601x3601.

$ gdalwarp -of GTiff -srcnodata 32767 -t_srs "+proj=utm +zone=18F +datum=WGS84" -rcs -order 3 -tr 90 90 -multi ASTGTM2_S50W068_dem.tif S50W068.tif
Creating output file that is 927P x 1314L.
[snip]

$ gdal_translate -of SRTMHGT S50W068.tif S50W068.hgt
Input file size is 927, 1314
0Warning 1: The corner coordinates of the source are not properly aligned on plain latitude/longitude boundaries.
ERROR 1: Image dimensions should be 1201x1201 or 3601x3601.

So I think instead of -tr 90 90 should be used -ts 1201 1201 for re-sampling in this case, because image dimensions  1201x1201 is expected from gdal_translate -of SRTMHGT

$ gdalwarp -of GTiff  -srcnodata 32767 -t_srs "+proj=utm +zone=18F +datum=WGS84" -rcs -order 3 -ts 1201 1201 -multi ASTGTM2_S50W068_dem.tif S50W068.tif
Creating output file that is 1201P x 1201L.
[snip]

$ gdal_translate -of SRTMHGT  S50W068.tif  S50W068.hgt
Input file size is 1201, 1201
0Warning 1: The corner coordinates of the source are not properly aligned on plain latitude/longitude boundaries.
Warning 1: Expected output filename is S5569384E10.

I still need get rid of this 0Warning.

thank you

mira