[gdal-dev] gdalwarp _ RPC_DEM ignored ?

[Dmitriy Baryshnikov]

Hi,

the parameter may ignored because the input tiff lack the RPC 
coefficients. Does any of RPC coefficient exist? What is gdalinfo output 
of you aerial photos?

Best regards,
     Dmitry

18.03.2014 23:54, alain Sauter ?????:
> Hi all,
>
> I am trying to orthorectify a couple of aerial photos using gdalwarp, 
> but i am stuck with the /-to /transformer option. I have seen in 
> archive two request concerning this issue, but without any answer for 
> now... so hope this 3rd will have a reply ;)
>
> materials :
> scan of an old aerial photo, without fly info and, of course, without 
> projection, tif format
> Dem of the region, tif format
>
> what i've done :
> using qgis georeferencer to grab some GPC's on the aerial photo
> using gdal_translate to insert GPC's in the aerial photo
>
> what i've try :
>
> using gdalwarp to transform, rectify and project the aerial photo with :
> /gdalwarp -to RPC_DEM=dem.tif -t_srs=EPSG:2154 input.tif output.tif/
>
> result:
> my file is transformed and projected but not rectified. Option /-to 
> RPC_DEM /is ignored by gdalwarp, even if I write wrong option like 
> /-to RP_D...
>
> /Am i doing something wrong ?
>
> thanks for reply
>
> Alain
>
>
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