I need to run a Viewshed analysis (ESRI 10.2 spatial analyst tool) to answer this: what areas will be able to see a proposed 30m high structure.
I have the choice of a DSM or a DTM to use as the input elevation model. I am thinking that the DSM will be better as it will be the tops of trees/buildings etc.) which in the real world will (mostly) obstruct the views of the structure. Is that the best one to use?
If so what is my Offset B ( the height of the observer). Usually I would put this as 1.5m - does this still make sense to do this. Or will this be like putting a person standing tops of the trees?
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I have the choice of a DSM or a DTM to use as the input elevation model. I am thinking that the DSM will be better as it will be the tops of trees/buildings etc.) which in the real world will (mostly) obstruct the views of the structure. Is that the best one to use?
If so what is my Offset B ( the height of the observer). Usually I would put this as 1.5m - does this still make sense to do this. Or will this be like putting a person standing tops of the trees?
أكثر...