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Proceedings Paper

Computation of hillshade values considering diffuse radiation condition
Author(s): Qingzhou Luo; Yechao Yan; Shuping Yue
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Paper Abstract

There is no direct solar irradiance in shadow area. The terrain information of shadow area is often neglected in preceding researches for that hillshade values are calculated only by direct solar irradiance. In this paper, a model simulating hillshade values in natural environment based on the total irradiance which consists of direct solar irradiance and diffuse sky irradiance are developed. According to isotropic model of diffuse sky radiation, the author provides a formula to calculate the illumination of diffuse sky irradiance. The relative hillshade values can be calculated according to solar position and the ratio of diffuse irradiance to total irradiance on horizontal surface. This research shows the new method is more suitable to express topographic information in complex terrain areas.

Paper Details

Date Published: 15 October 2009
PDF: 7 pages
Proc. SPIE 7492, International Symposium on Spatial Analysis, Spatial-Temporal Data Modeling, and Data Mining, 749211 (15 October 2009); doi: 10.1117/12.838393
Show Author Affiliations
Qingzhou Luo, Nanjing Univ. of Information Science and Technology (China)
Yechao Yan, Nanjing Univ. of Information Science and Technology (China)
Shuping Yue, Nanjing Univ. of Information Science and Technology (China)


Published in SPIE Proceedings Vol. 7492:
International Symposium on Spatial Analysis, Spatial-Temporal Data Modeling, and Data Mining
Yaolin Liu; Xinming Tang, Editor(s)

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