Bidirectional visibility |
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Authors: | William O Rasmussen |
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Institution: | (1) Department of Agricultural and Biosystems Engineering, University of Arizona, 507 Shantz, 85721 Tucson, Arizona, USA |
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Abstract: | The percentage of the cross-sectional area of two objects (e.g., vehicles, hikers, or animals) that can be seen from each
of their locations in a forested area is generally not the same. There is a directionality to the visibility between them.
This is due to the relative positions and sizes of the vegetation and other view-blocking features between the objects. An
analytical technique has been developed to help understand bidirectional visibility. Its use entails the construction of a
visibility diagram containing the basic visibility information between observers in a given setting.
An example is presented showing the use of the visibility diagram to determine visibility between two moving observers in
a forested environment. The diagram is also used to determine the differences in the percentage each observer has of the other's
visible cross-sectional area (bidirectional visibility). A discussion of the application of the technique in the planning
or development of new facilities, as well as in forest and wildlife management, is provided. |
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Keywords: | Visibility Line of sight Vegetative effects Recreational area Habitat analysis Road corridor Planning Management |
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