%0 Journal Article
%T 3-D SURFACE RECONSTRUCTION FROM VERY LARGE TOPOGRAPHIC MAP<br>大幅面地图的三维地形重建
%A HU Wei-Ming
%A WU Bing
%A LIU Wei
%A <br>胡卫明
%A 吴兵
%A 刘崴
%J 自动化学报
%D 2002
%I 
%X We introduce our practical system that is applicable to very large topographic map. We present a practical algorithm for contour line interpolation, which can get rid of some fatal defects often found in the grid and triangular net approaches, known as "the interpolated line's intersection with mother contour lines". We propose an algorithm for contour line elevation interpretation. A practical algorithm for three dimensional regular data field is presented to handle a very large map, and the quality of the calculated grid elevation is high due to the sufficient exploitation of prior knowledge. The run time complexity of the approach for establishing the 3 D regular data field is O(m n) , linear to the number of data points (m) and the number of grid points (n) , therefore, the processing speed is very high. Finally, a real time graph is created with the three dimensional regular data field.
%K Very large topographic map
%K contour line interpretation
%K 3
%K D surface reconstruction<br>大幅面地图
%K 三维地形重建
%K 地理信息系统
%K 地理学
%K 等值线
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=E76622685B64B2AA896A7F777B64EB3A&aid=1E5E405F79DAAB25&yid=C3ACC247184A22C1&vid=D3E34374A0D77D7F&iid=CA4FD0336C81A37A&sid=E84BBBDDD74F497C&eid=B9704B40A4225A24&journal_id=0254-4156&journal_name=自动化学报&referenced_num=6&reference_num=17