[gdal-dev] GetGCPs returns null

[Bar Ori]

Hi all,
I wanted some explanations please about how to work with the GCPs.
I have an image and I want to save its corners coordinates (not a rectangle) as GCPs and not using the SetGeoTransform method which takes the upper-left coordinate and creates a rectangle based on it.
I accomplished it using the SetGCPs method. I even see that the IGEOLO field (I am working with NITF) is set correctly with those coordinates.
The problem is that I want to retrieve those coordinates for painting a footprint on a map I have.
I Tried the GetGCPs method but I got null. Also the GetGCPCount returns 0.
(I can get the data from the IGEOLO, but I prefer another solution, and in general to understand why GetGCPs returns nothing...)

Thanks.


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Ori Bar | Software Developer
Applications Development
Elbit Systems Land and C4I
T  +972-9-8898900  |   M  +972-504-734296




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