| 大型GIS中方位距离的量算方法 |
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| 引用本文： | 吕晓华,杨国平.大型GIS中方位距离的量算方法[J].测绘学院学报,2004,21(2):138-140. |
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| 作者姓名： | 吕晓华 杨国平 |
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| 作者单位： | [1]大连高新技术园区，辽宁大连116023 [2]信息工程大学测绘学院，河南郑州450052 |
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| 摘 要： | 摘要：方位、距离的量算是GIS开发、数字地图应用等空间分析中最基本的计算。沿用传统的局部投影平面上的各种分析、量算方法难以在大型GIS或大区域数字地图的空间分析中准确实施，距离、方位的量算应基于(B，L)2维场所决定的地球椭球面几何参考系依据大地线进行。文中给出了方位、距离的简化算法，计算精度高，展开级数收敛快，没有显著病态、停滞，对大型GIS及大区域数字地图的数据处理，对多分辨率、大区域或全球范围的数据无缝连续的定位分析有重要的实际应用价值。
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| 关 键 词： | GIS 大地线 方位 距离 |
Algorithms of the Measurements of Azimuth and Distance in Large Area GIS |
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| LU Xiao-hua,YANG Guo-ping.Algorithms of the Measurements of Azimuth and Distance in Large Area GIS[J].Journal of Institute of Surveying and Mapping,2004,21(2):138-140. |
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| Authors: | LU Xiao-hua YANG Guo-ping |
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| Institution: | LU Xiao-hua~1,YANG Guo-ping~2 |
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| Abstract: | The measurement of azimuth and distance is the most basic calculation in spatial analysis such as the development of GIS and the application of digital map. It is difficult to put in practice accurately if we follow to use the traditional methods of analysis and measurement for the local projecting plane. The measurement of azimuth and distance should be done according to the geodesic line and geometric reference system of the ellipsoidal plane of earth determined by (B,L). In this article, the simplified algorithm of the measurement of azimuth and distance is given. Its calculation precision is high and convergence of expansion series is quick while it has no notable morbidity and stagnation, so it has an important application value for the disposing of the data of the large area digital map and GIS and the consecutive location analyzing of data of multi-resolution, large regional or global. |
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| Keywords: | GIS geodesic curve azimuth distance |
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