|Table of Contents|

Method of drawing spatial curves in 3D-GIS(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2005年第02期
Page:
63-65,69
Research Field:
Publishing date:

Info

Title:
Method of drawing spatial curves in 3D-GIS
Author(s):
HUI Wen-hua; guo Xin-cheng
School of Geological Engineering and Surveying Engineering,Chang’ an University,Xi’ an 710054,China
Keywords:
3D-GIS;  tension spline function;  spatial curve
PACS:
P283.7
DOI:
-
Abstract:
This paper studied the problem of how to draw spatial curve in 3D-GIS by tension spline function that is used ex- tensively in drawing plane curves. Based on the comparison and analysis of the theory, a test about draning a section of spa- tial curve with the observation data of highway around a mountain was carried out. The results indicate that with tension spline function, the problem of how to obtain the shortest curve between two points is solved in theory and spatial curve can be well analogized out of the restriction of distance between two adjoining points. At the same time, the smoothness of spa- tial curve is very well. If the number of points is very large several sections can be dividedfrom the carve. Only if the condi- tion of adjoining ponts is same, the whole curve is still smooth.

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