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lines changed Original file line number Diff line number Diff line change @@ -1606,15 +1606,19 @@ def viewshed(raster: xarray.DataArray,
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observer_elev : float
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Observer elevation above the terrain.
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target_elev : float
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- Target elevation offset above the terrain.
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+ Target elevation offset above the terrain, which is the height
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+ in surface units to be added to the z-value of each pixel
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+ when it is being analyzed for visibility.
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Returns
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-------
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viewshed: xarray.DataArray
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A cell x in the visibility grid is recorded as follows:
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If it is invisible, then x is set to INVISIBLE.
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If it is visible, then x is set to the vertical angle w.r.t
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- the viewpoint.
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+ the viewpoint. The value returned is in [0, 180]. A value of 0 is
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+ directly below the specified viewing position,
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+ 90 is due horizontal, and 180 is directly above the observer.
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Examples
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