[GRASS-user] gdal_translate

GRASS GRASS user
1

Hi

I’ve got these coordinates
upper-right-corner: 33 degrees, 40 minutes, 31.28 seconds S
18 degrees, 17 minutes, 32.52 seconds E

lower-left-corner: 33 degrees, 40 minutes, 31.28 seconds S
18 degrees, 38 minutes, 55.37 seconds E

I want to clip a portion of Cape Flats using these coordinates from a GeoTiff that covers the whole South Africa. I tried to convert these coordinates into decimal degrees but when I’m trying to run gdal_translate -projwin -33.67536 18.29237 -33.94925 18.64871 srtmgdem.tif cape_flats.tif its giving me an error message:

Input file size is 36001 , 24001
Computed -srcwin -52409 -39950 -328 -427 from projected window.
Computed -srcwin falls outside raster size of 36001X24001

2

Hi

I’ve got these coordinates
upper-right-corner: 33 degrees, 40 minutes, 31.28 seconds S
18 degrees, 17 minutes, 32.52 seconds E

lower-left-corner: 33 degrees, 40 minutes, 31.28 seconds S
18 degrees, 38 minutes, 55.37 seconds E

I want to clip a portion of Cape Flats using these coordinates from a GeoTiff that covers the whole South Africa. I tried to convert these coordinates into decimal degrees but when I’m trying to run gdal_translate -projwin -33.67536 18.29237 -33.94925 18.64871 srtmgdem.tif cape_flats.tif its giving me an error message:

Input file size is 36001 , 24001
Computed -srcwin -52409 -39950 -328 -427 from projected window.
Computed -srcwin falls outside raster size of 36001X24001

Perhaps you have the coordinates above in the wrong order? It should be:
-projwin
so for Cape town you probably want
-projwin 18.29237 -33.67536 18.64871 -33.94925

Running ‘gdalinfo srtmgdem.tif’ will give you the bounding box (Upper Left, Lower Right, etc) of the original. This way you can see if you’ve chosen an area within the original.

··· 
-- 
Micha Silver
[http://www.surfaces.co.il/](http://www.surfaces.co.il/)
Arava Development Co.  +972-52-3665918