[gdal-dev] Can I get transformed coordinate value in gdalwarp?

[Even Rouault]

Le jeudi 07 février 2013 01:12:06, OHTSUKA Ko-hei a écrit :
> Hello,
> 
> I'll try to change many raster images into geotiffs using gdal (gdalwarp).
> And, want to know where each image's non -gcp pixel points  will move to.
> 
> For example,
> 
> If image's point (300,400) will move to GeoTiff's (135e,35n),
> by using gcps (200,300 => 130e,40n), (200,500 => 130e, 30n), and (400,
> 300 => 140e, 40n),
> I want to know this change (300,400 => 135e,35n).
> And also, (250, 400) moves where? (350, 200) is? and so on.
> 
> Is there any function to get this value?
> Or, I also understand program a little, it is OK if it needs some coding.

I believe that http://gdal.org/gdaltransform.html should fit your need.

> 
> Thanks,
> Ko-hei
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