空间编码QuaPA方法的改进与实验  

Modification to and Experiments on QuaPA Spatial Coding Method

作　　者：吴立新[1] 殷倩[2] 蔡振锋[2] 车德福[1] 

机构地区：[1]东北大学3S与数字矿山研究所,辽宁沈阳110004 [2]中国矿业大学3S与沉陷工程研究所,北京100083

出　　处：《地理与地理信息科学》2007年第2期8-11,共4页Geography and Geo-Information Science

基　　金：国家杰出青年基金项目(50525414);国家自然科学基金项目(40571137);国家863计划项目(2006AA12Z216);北京市自然科学基金重点项目(4041005)

摘　　要：空间编码是GIS与全球空间数据组织与共享的重要基础。针对QuaPA编码方法进行三维与全球空间编码时存在数据冗余和象限二义性问题,采用双Morton编码和象限标识后置方式进行改进,提出QuaPA+方法。介绍QuaPA+编码步骤及其反演原理,并以中国及邻区地表及地下10 km2、0 km以浅的三维球壳空间网格划分为例,分别进行了球壳网格的QuaPA和QuaPA+编码实验。实验表明,QuaPA+编码解决了象限二义性问题,缩短了编码长度,节省了存储空间。Spatial coding is an important foundation of GIS and global spatial data organization and sharing applications. For the problem of data redundancy and quadrant ambiguity as QuaPA coding method being applied for the 3D and global spatial coding, double-Morton mode and rear quadrant - label are used for modification to QuaPA, and a modified coding method named as QuaPA^＋ is proposedd. This paper introduced the coding procedures of the principal code of QuaPA^＋ and the principles of spatial position reversion based on QuaPA^＋ code. With the 3D spherical shell - grid of China and it adjacent regions respectively above depth of 10 km and 20 km be the cases, the 3D spherical shell - grid coding is conducted with both QuaPA and QuaPA^＋ methods. It was proved that the quadrant ambiguity has been solved, the code length gets shorter and the storage space is saved.

关 键 词：空间编码 空间实体 球壳网格 数据组织 QuaPA QuaPA^+ 

分 类 号：P208[天文地球—地图制图学与地理信息工程]