Volume 38 Issue 3
Mar.  2013
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DONG Youfu, TANG Guoan. Research on Terrain Simplification Using Terrain Significance Information Index from Digital Elevation Models[J]. Geomatics and Information Science of Wuhan University, 2013, 38(3): 353-357.
Citation: DONG Youfu, TANG Guoan. Research on Terrain Simplification Using Terrain Significance Information Index from Digital Elevation Models[J]. Geomatics and Information Science of Wuhan University, 2013, 38(3): 353-357.
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Research on Terrain Simplification Using Terrain Significance Information Index from Digital Elevation Models

  • 1 College of Geomatics Engineering, Nanjing University of Technology, 200 North Zhongshan Road, Nanjing 210009, China; 2 Key Laboratory of Virtual Geographic Environment, Ministry of Education, Nanjing Normal University, 1 Wenyuan Road, Nanjing 210046, China

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  • Author Bio:

    DONG Youfu, associate professor, Ph.D, majors in digital terrain analysis based on DEMs and spatial data mining.Email: dongyoufu@163.com

  • Received Date: December 14, 2012
  • Published Date: March 04, 2013
    Graphical Abstract
    • Abstract
  • We present a new method for simplifying terrain using terrain significance information (TSI) index from DEMs. Firstly, TSI index of each grid cell based on DEMs is extracted. Secondly, critical elevation points are extracted from original DEMs for constructing target DEMs with proper TSI index threshold values. Finally, 1∶50 000 DEMs taking as reference target, and very important points (VIP) and three\|Douglas\|Peucker (3DD\|P) being as verify methods, the terrain simplification effect of the DEMs reconstructed with the method is analyzed and evaluated. The results show that the terrain simplification method based on TSI index is not only with better numerical precision, but also effective in reducing the terrain distortion by keeping terrain skeletons to meet the demands in different levels of multi\|scale terrain digital modeling.
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    • References (12)
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