Volume 30 Issue 3
Mar.  2005
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QI Hua, LI Deren. Radiation Spatial Division Based on Q_i(x_i,y_i) and Restrained Edge Mosaic of TIN[J]. Geomatics and Information Science of Wuhan University, 2005, 30(3): 204-208.
Citation: QI Hua, LI Deren. Radiation Spatial Division Based on Q_i(x_i,y_i) and Restrained Edge Mosaic of TIN[J]. Geomatics and Information Science of Wuhan University, 2005, 30(3): 204-208.
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Radiation Spatial Division Based on Q_i(x_i,y_i) and Restrained Edge Mosaic of TIN

  • 1 State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, 129 Luoyu Road, Wuhan 430079, China

Funds: 国家863计划资助项目(2001AA135130)
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  • Received Date: December 16, 2004
  • Revised Date: December 16, 2004
  • Published Date: March 04, 2005
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  • This paper proposes the method of radial spatial division based on Q i(x i,y i) for realizing the restrained edges mosaic in constructed TIN. First of all, it introduces the basic principle of radial spatial division based on Q i(x i,y i). After that, on the basis of the principle the algorithm to realize restrained edges mosaic is given in detail. A spatial division tree is proposed as an efficient implementation method in the aspect of reconstruction of triangles and their spatial relationship after the division. The analysis of time complexity shows that the time complexity to execute Q i(x i,y i) is lower than that to compute the distance from a point to a line. It is shown that the radial spatial division algorithm proposed in this paper has more advantages in time efficiency than the spatial division algorithm based on distance.
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