[Gdal-dev] How to correct use GDALGCPTransform

[Frank Warmerdam]

Ivan Mjartan wrote:
> Hi, Frank and all .
> 
> Thanks for previous reply. It helps me very much.
> 
> So I was little bit testing and I found solution for me, I am using 
> GDALGenImgProjTransform and virtual dataset like you said.
> 
> It works fine but I have question Is it true when I use virtual datatset 
> that whole raster is loading in to memory? 

Ivan,

VRT rasters are not loaded all into memory.  Instead the VRT rasters
keeps a reference to the source raster and loads raster data from it
as it is requested from the VRT raster.

Best regards,

 > Maybe I have to save input
> raster into intermediate tiff file (to set GCP into input raster, it can 
> be jpg or other), because my input can by very large, just when raster 
> is loading whole.



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