Volume 37 Issue 12
Dec.  2012
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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.
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Geographical Elements′ Spatial Location Identification Considering Geometric Features

  • 1 Key Laboratory of Virtual Geographic Environment of Ministry of Education,Nanjing Normal University, 1 Wenyuan Road,Nanjing 210046,China;2 Zhejiang Academy of Surveying and Mapping,83 North Baochu Road,Hangzhou 310012,China;3 Information Center,Jiangsu Provincial Bureau of Surveying,Mapping and Geoinformation, 75 West Beijing Road,Nanjing 210046,China

Funds: 国家自然科学基金资助项目(40771164);;高等学校博士学科点专项科研基金资助项目(20103207110011)
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  • Received Date: October 09, 2012
  • Published Date: December 04, 2012
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  • 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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