Hi,
I noticed something that for me looks weird and I would like to know maybe I am
doing something wrong.
If not, how should I overcome this behavior.
I set 4 GCPs as follows:
var gcps = new[]
{
new GCP(LeftUp.X, LeftUp.Y, LeftUp.Z, 0.5, 0.5, null, "1"),
new GCP(RightUp.X, RightUp.Y, RightUp.Z, Width - 0.5, 0.5, null, "2"),
new GCP(RightDown.X, RightDown.Y, RightDown.Z, Width - 0.5, Height - 0.5, null,
"3"),
new GCP(LeftDown.X, LeftDown.Y, LeftDown.Z, Height - 0.5, null, "4")
};
And when I am doing as follows:
var geotransform = new double[6];
Gdal.GCPsToGeoTransform(gcps, geotransform, 0)
Or (after using dataSet.SetGCPs(gcps, projection) :
var geotransform = new double[6];
dataSet.GetGeoTransform(geotransform);
So the values returned, are wrong.
For example, if the LeftUp.X was 35.01050 so the value of geotransform[0],
which supposed to be the same value, can be 35.0082.
The same with all the geotransform values.
If I am getting from the dataset and setting again, every time it is changing
more and more.
Is there any connection to the use of the "0.5"?
Thanks.
[cid:image001.png@01D121E3.FD25A2D0]
Ori Bar | Software Developer
Applications Development
Elbit Systems Land and C4I
T +972-9-8898900 | M +972-504-734296
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