[gdal-dev] Re: gdalinfo: corner coords in other projection

[Hermann Peifer]

On 26/05/2011 09:21, Jukka Rahkonen wrote:
> Lefman, Jonathan ERDC-TEC-VA<Jonathan.Lefman<at>  usace.army.mil>  writes:
>
>>
>> Hi all,
>>
>> Is there an executable utility that takes the corner coordinates from a gtiff
>> and translates them into another projection system?  For example, I have a
>> gtiff in UTM and I want to translate the coordinates of the bounding box (or
>> corners) into WGS84.  Or is there a way to do this non-programmatically using
>> a combination of executable utilities?
>
> The programmers should stop reading now, this is a farmer's son recipe for doing
> what you want with something that already exists.
>
> - Use gdaltindex for sending the bounding box of your image into a shapefile
> - Use ogr2ogr with s_srs and t_srs and reproject the shapefile into the system
> you are interested in.
> - Use ogrinfo for listing the extents of the reprojected shapefile.
>

Just to add that "the extents of the reprojected shapefile" might well 
be what the OP wanted to know, but it is not what he asked for: "the 
corner coordinates from a gtiff translated into another projection system"

Here a picture from osgeo.org/mapguide which shows the difference 
(although the picture was made to illustrate something different)

http://trac.osgeo.org/mapguide/attachment/wiki/MapGuideRfc51/MapToLayerCS.png

Hermann