Hi,
In fact the DEM is not always used. It can be used if your input
image and training vectors are not in the same projection. For
instance, if you use a sensor image and training vectors projected
in WGS84, the application will have to convert the polygon
coordinates from WGS84 to your sensor frame, hence the need of a
DEM.
Regards,
Guillaume
On 01/23/2018 03:52 PM, Hristo Nikolov
wrote:
Dear all,
Since while I'm wondering why DEM is needed in training for
classification procedures. I hope I
read the OTB documentation, but no reason was stated. Even
the link set for the geoid file
is broken. Any idea why this is happening?
Regards.
Hristo
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