SRG剖分编码与地理坐标的转换算法研究  

Study of Translating Algorithm between SRG Subdivision Codes and Geographic Coordinates

作　　者：张玉梅[1] 聂洪山[1] 谢启友[1] 孙兆林[1] 徐欣[1] 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073

出　　处：《地理与地理信息科学》2012年第2期40-43,共4页Geography and Geo-Information Science

基　　金：国家973计划项目(613990103);国防科技大学科研计划项目(JC09-04-03)

摘　　要：提出一种基于SRG剖分方法的剖分编码与经纬度坐标之间的转换算法,不涉及任何投影变换,计算过程只需加、减、乘、除简单算术运算,计算速度快,且SRG剖分编码本身就具有固定的方向性,利于邻近搜索。算法中采用坐标系辅助区分一些难以区分的菱形块,降低了转化误码率,进而提高了转换的精度。This paper presents a translating algorithm between SRG subdivision codes and latitude/longitude coordinates.The algorithm does not involve any projection transformation.When calculating,only use addition,subtraction,multiplication and division simple arithmetic,so calculation is faster.SRG subdivision code has a fixed direction,so easy to search nearby.And the coordinate system is used to assist the distinction between rhombus-shaped pieces which are difficult to distinguish.And also the algorithm improves the accuracy of the translation.

关 键 词：SRG 剖分编码 坐标转换 经纬度 地理坐标 

分 类 号：P208[天文地球—地图制图学与地理信息工程]