[Freegis-list] Clipping raster with OpenEV

[Frank Warmerdam]

On Fri, 18 Feb 2005 20:27:40 -0500, Rajkumar Singh <gisdude at hotpop.com> wrote:
> Hi,
> 
> I'm not sure if this question was answered on the list before so please
> forgive my ignorance. I did a search on Google but didn't find anything
> substantial either. I'm trying to clip a DEM (GTOPO30) using a box
> defined by two pairs of latitude/longitude coordinates. Is there anyway
> to do it without having to define the ROI by drawing a box? Or is there
> any other free software I can use besides GRASS? If there are any
> tutorials online please point me to them. Thanks for all responses.

Raj,

You can clip out a subrectangle using gdal_translate.

eg. 

gdal_translate -projwin  ulx uly lrx lry in.tif out.tif

Using the -projwin argument, the corners are in the coordinate
system of the file in question.  With GTOPO that would be 
lat/long. 

Best regards,
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