[gdal-dev] Converting coordinate systems(gdalwarp)

[Omkaranathan]

Hi,
I am trying to convert a geotiff file from Lat/Long to UTM coordinates 
using gdalwarp.
The output data produced is gives proper coordinate system info but the 
data is only a black strip.

This is the command line option I have used .
gdalwarp -t_srs "+proj=utm +zone=19 +datum=WGS84" input.tif  out.tif
Am I doing something wrong?

It'll be great if you can suggest something.

Thanks

Om