Pills of Geography, Maps, Open source GIS – Viewshed and LOS points (Nicola De Innocentis’ BLOG)

Pills of Geography, Maps, Open source GIS – Viewshed and LOS points

One of important features in a GIS  is the Viewshed Analysis. A viewshed is an area that is visible from a point or, in other words, what are the points on the map which are in line of sight with a given user-specified point.

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