gis.Open Paper

Seite weiterempfehlenSeite drucken

Assigning a Fixed Height to Land Cover Screen for Use in Visibility Analysis

There is little controversy over how to conduct a visibility analysis over bare terrain. However, in many areas this results in a totally unrealistic estimate of a project’s visibility, and the question arises how to account for the screening effect of land cover when information about its height is not available. This paper investigates the difference between a digital model of the terrain (DTM) and canopy surface (DSM) from a 3-mile wide corridor in the state of New Hampshire, USA to evaluate the appropriateness of assigning a fixed height to land cover for the purposes of visibility analysis. The results find a 40-ft (12 m) height reasonable for forest cover, but suggest that using fixed heights for other land covers may be inappropriate.

Autor / Author: Palmer, James F.
Institution / Institution: T. J. Boyle Associates, Vermont, USA
Seitenzahl / Pages: 8
Sprache / Language: Englisch
Veröffentlichung / Publication: JoDLA − Journal of Digital Landscape Architecture, 1-2016
Tagung / Conference: Digital Landscape Architecture 2016 – Representing, Evaluating and Designing Landscapes: Digital Approaches
Veranstaltungsort, -datum / Venue, Date: Istanbul, Turkey 01-06-16 - 03-06-16
Schlüsselwörter (de):
Keywords (en): Viewshed, visibility screen
Paper review type: Full Paper Review
DOI: doi:10.14627/537612015
3673 -