On Fri, 14 Oct 2022, Johannes Paul wrote:
Hello,
Yes i would need a polygon with the raster footprint.
apps/gdaltindex.cpp implements the gdaltindex application
and is written in C++, so should do what you wish.
Note that this assumes the raster geolocation is given by the affine
transformation GDALDataset::GetGeoTransform(), which is usually true.
Howver, if the raster geolocation is given by one of the other methods in
https://gdal.org/user/raster_data_model.html (GCPs and/or RPCs)
you may have to do the work yourself.
Le ven. 14 oct. 2022 à 10:01, Laurențiu Nicola via gdal-dev <
gdal-dev@lists.osgeo.org> a écrit :
Hi Mats,
Vector and raster datasets are pretty much different things in GDAL. And
generally it would be a good idea to check whether e.g. GetLayer actually
returns a pointer or nullptr.
What exactly do you mean by "associated OGRPolygon"? Do you want a polygon
with the same footprint as the raster?
Laurentiu
On Fri, Oct 14, 2022, at 10:51, Johannes Paul wrote:
Hello,
Is there a way to get the OGRGeometry object out of a GDALDataset object
in c++?
My GDALDataset is a raster and i would like to get the associated
OGRPolygon out of it.
I've used:
srcDataset->GetLayer(0)->GetNextFeature()->GetGeometryRef()->toPolygon()
However i keep getting segmentation faults error.
Any help would be appreciated.
Thanks
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Andrew C. Aitchison Kendal, UK
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