孙毅中, 姚驰, 陈少勤, 徐文祥. 顾及几何特征的地理要素空间位置唯一性标识方法[J]. 武汉大学学报 ( 信息科学版), 2012, 37(12): 1486-1489.
引用本文: 孙毅中, 姚驰, 陈少勤, 徐文祥. 顾及几何特征的地理要素空间位置唯一性标识方法[J]. 武汉大学学报 ( 信息科学版), 2012, 37(12): 1486-1489.
SUN Yizhong, YAO Chi, CHEN Shaoqin, XU Wenxiang. Geographical Elements′ Spatial Location Identification Considering Geometric Features[J]. Geomatics and Information Science of Wuhan University, 2012, 37(12): 1486-1489.
Citation: SUN Yizhong, YAO Chi, CHEN Shaoqin, XU Wenxiang. Geographical Elements′ Spatial Location Identification Considering Geometric Features[J]. Geomatics and Information Science of Wuhan University, 2012, 37(12): 1486-1489.

顾及几何特征的地理要素空间位置唯一性标识方法

Geographical Elements′ Spatial Location Identification Considering Geometric Features

  • 摘要: 针对矢量地理要素的空间几何特征及其成图基准和使用习惯,提出了一种顾及空间要素形态的行列四叉树网格,给出了网格基准和划分的方法,设计了根据该网格捕捉地理要素几何特征的算法。该方法通过地理要素所在网格和其自身的几何特征,实现了地理要素的空间位置唯一性标识。

     

    Abstract: Based on the spatial position and the geometric characteristics of geographical objects,we present a method to uniquely identify geographical objects by combining their rank Quadtree grid index with spatial morphology.Based on the classic rank Quadtree grid method,we devise an algorithm to extract representative points,outline,and orientation of geographical objects in each grid.We integrate the geometry and grid information to achieve the unique identification of spatial objects.The method is applied to Nanjing city in China to identify the unique spatial location of spatial objects,and it shows improvement in the speed of spatial positioning,searching and querying of spatial objects.

     

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