I'm trying to work out whether there is a way to do something similar to a ZTV/Visibility analysis but only include the cells from which the point (with 50m OFFSETA/height) would be visible above the horizon.
For example a windfarm sited at the top of a ridge may be said to have a large Zone of Theoretical Visibility in one direction, but if there is a mountain behind it then the visual impact of that turbine/farm would be lessened.
I would be grateful if anyone knows a way to do this. I can use any open source software or ArcGIS with Spatial Analyst and 3D licences.
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For example a windfarm sited at the top of a ridge may be said to have a large Zone of Theoretical Visibility in one direction, but if there is a mountain behind it then the visual impact of that turbine/farm would be lessened.
I would be grateful if anyone knows a way to do this. I can use any open source software or ArcGIS with Spatial Analyst and 3D licences.
أكثر...