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> I'm not so sure because It will also rise the 1st plan hill.
> Anyway, I wander what is wrong there, why I have a so different result
> in POV compared to the reality ...

First, it can be supposed that the camera position, angle and look_at are
different in the photo and in your POV-Ray scene.

Second, keep in mind that the maximum height of a POV-Ray height_field is
always, at its maximum, equal to 1. Also, its length and width are always 1.
This may not be the same as in the DEM specification. If the DEM files use
real-life dimensions, for instance, then the converted scene should be
scaled accordingly :
scale <DEM_size_x, DEM_size_y, DEM_size_z>
Of course, the camera should then be placed also accordingly.

G.

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