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Proceedings Paper

BVIFM: a vector model for calculating sunlight shadow effect of terrain on neighboring buildings
Author(s): Fu Zhang; Lijuan Zhang; Guonian Lv; Zhu Gu
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Paper Abstract

In order to solve the current problem of the sunlight analyzing models, which are not suitable for most of the mountainous and hilly areas because of ignoring the factors that the topography influences the sunlight, this article will integrate the principles and ideas of "Shadow Equivalence", "Reverse Sunlight" and "Sky Graph", and will propose "Backlighting Vector Intersecting Shadow Projection SurFace Model" (BVIFM), from the angle of the Geometrical Optics. Besides, this article will use a certain residential district in Chongqing Province and the actual terrain data (DEM) as examples to verify the validity and correctness of the BVIFM .The results from the experiments show that the BVIFM can be quite satisfactory, while calculating the sunlight effects caused by the uncertain mountains and hills on their neighboring constructions. The proposal of the BVIFM can not only remedy the shortcomings of the current models, but also provides a new solution for the sunlight calculation as well as laying a foundation of a unified model of the sunlight analysis.

Paper Details

Date Published: 10 November 2008
PDF: 14 pages
Proc. SPIE 7146, Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Advanced Spatial Data Models and Analyses, 71461U (10 November 2008); doi: 10.1117/12.813158
Show Author Affiliations
Fu Zhang, Nanjing Normal Univ. (China)
Lijuan Zhang, Nanjing Normal Univ. (China)
Luoyang Institute of Science and Technology (China)
Guonian Lv, Nanjing Normal Univ. (China)
Zhu Gu, Nanjing Normal Univ. (China)

Published in SPIE Proceedings Vol. 7146:
Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Advanced Spatial Data Models and Analyses
Lin Liu; Xia Li; Kai Liu; Xinchang Zhang, Editor(s)

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