An accuracy assessment of various GIS-based viewshed delineation techniques

Citation
Ma. Maloy et Dj. Dean, An accuracy assessment of various GIS-based viewshed delineation techniques, PHOTOGR E R, 67(11), 2001, pp. 1293-1298
Citations number
14
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Optics & Acoustics
Journal title
PHOTOGRAMMETRIC ENGINEERING AND REMOTE SENSING
ISSN journal
0099-1112 → ACNP
Volume
67
Issue
11
Year of publication
2001
Pages
1293 - 1298
Database
ISI
SICI code
Abstract
Actual viewsheds from 11 viewpoints were field surveyed and compared to pre dicted viewsheds generated using various commonly used elevation data sets, various data models, and various visibility criteria. It was found that so me data sets produced predicted viewsheds that mimicked surveyed viewshed m uch more accurately than other data sets, and that some combinations of dat a models and visibility criteria produced much greater matching accuracies than other combinations. However, none of the combinations of data source, data model, and visibility criteria produced predicted viewsheds that match ed surveyed viewsheds with much more than 50 percent accuracy. Some possibl e reasons for this lack of accuracy are proposed.