1) Topography technique
Found on
https://www.crosswordclues.com/clue/viewshed
A viewshed is an area of land, water, or other environmental element that is visible to the human eye from a fixed vantage point. The term is used widely in such areas as urban planning, archaeology, and military science. In urban planning, for example, viewsheds tend to be areas of particular scenic or historic value that are deemed worthy of pre...
Found on
http://en.wikipedia.org/wiki/Viewshed
The landscape that can be directly seen under favorable atmospheric conditions from a viewpoint or along a trail corridor.
Found on
http://www.americantrails.org/
The total landscape seen or potentially seen from all or a logical part of a travel route, use area, or water body.
Found on
https://www.encyclo.co.uk/local/22831
No exact match found.
