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Proceedings Paper

Direction difference in terrain features extraction
Author(s): Xincheng Guo; Rongjuan Li; Chen Huang
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Paper Abstract

Geographic information obtained from sensors inevitably contains errors for all kinds of signal interference. How to automatically and effectively process geographic information to build qualified DEM has always been an important topic in relevant theoretical field. Automatic identification of gross errors is usually based on topographic trend. However, it's difficult to directly extract topographic trend from original sampling points, and there is contradictory of causal interoperability. This paper advances a new idea to solve the problem. Firstly, accurate terrain feature planimetric position is extracted. On this basis, the corresponding elevation is corrected. Then topographic trend is constructed. The key to exact accurate terrain feature planimetric position is to reduce the impact of errors. Therefore, direction difference in terrain features extraction is brought forward in this paper. This method equalizes the impact of errors, and terrain features become marked. The experimental results show that this method can effectively improve robust capacity in terrain features extraction. Topographic trend constructed by this method is well consistent with the actual terrain, especially in the region of identical slope as well as the ridge and valley axes.

Paper Details

Date Published: 16 October 2009
PDF: 7 pages
Proc. SPIE 7492, International Symposium on Spatial Analysis, Spatial-Temporal Data Modeling, and Data Mining, 749243 (16 October 2009); doi: 10.1117/12.838625
Show Author Affiliations
Xincheng Guo, Chang'an Univ. (China)
Rongjuan Li, Chang'an Univ. (China)
Chen Huang, Chang'an Univ. (China)


Published in SPIE Proceedings Vol. 7492:
International Symposium on Spatial Analysis, Spatial-Temporal Data Modeling, and Data Mining

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