[gdal-dev] Calculate lat lon of image corners knowing center's lat lon

[ogr user]

The answer is - it depends. If you know the image projection (Mercator?)
and the precise scale of the image - it may be enough to have just one
point (think - a tile from Google maps).
To georeference an image in a general case (assuming the image has
simple linear proportions) requires at least 2 (really at least 3)
points (otherwise the system of equations won't be solvable) and more
would be better. Once you solve it - you can get coordinates of any
other points in the image.


Aashish Chaudhary wrote:
> Hi,
>
> I have an image with center known in lat / lon. I need to calculate
> the image corners in lat / lon. I have some idea but I am wondering if
> someone can share his / her knowledge.
>
> Also is there a utility in gdal that would do this for me?
>
> Any help is appreciated.
>
> Thanks,
>
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