一种面向在线地图叠加的GIS数据几何校正方法  

A Geometric Correction Method of GIS Data for Online Map Overlay

作　　者：车森[1] 杨辉[1] 葛磊[1] 陈晓慧[1] CHE Sen;YANG Hui;GE Lei;CHEN Xiaohui(Information Engineering University,Zhengzhou 450001,China)

机构地区：[1]信息工程大学,河南郑州450001

出　　处：《测绘科学技术学报》2020年第4期421-424,433,共5页Journal of Geomatics Science and Technology

基　　金：国家自然科学基金项目(41801313,41901397)。

摘　　要：目前在我国内地使用的各种在线地图的空间坐标都被加入了非线性的偏移量,导致各种GIS数据产品(栅格和矢量)与在线地图无法实现基于位置的准确数据叠加。针对此问题,提出一种面向在线地图叠加的GIS数据几何校正方法,通过创建指定区域的WGS84经纬网格,建立WGS84球面坐标到在线地图平面坐标之间的坐标映射网格;然后实现WGS84球面坐标到在线地图平面坐标之间的正、反变换;最后利用正变换对矢量GIS数据进行几何校正,综合利用正、反变换模型,对栅格GIS数据进行几何校正。该方法可以有效解决各种GIS数据与在线地图叠加的坐标偏移问题,实现二者在空间上的精确配准。The spatial coordinates of various online maps currently used in our country have been added with non-linear offsets.As a result,the accurate location-based data overlay cannot be achieved between various GIS data(raster and vector data)and online maps.To solve this problem,a GIS data geometric correction method for online map overlay is proposed in the paper.By creating a WGS84 latitude and longitude grid in a specified area,a coordinate mapping grid between WGS84 spherical coordinates and online map planar coordinates is established.Then the forward and reverse transformation are realized between the WGS84 spherical coordinates and the online map plane coordinates.Finally,the forward transformation is used to geometrically correct the vector GIS data,and the forward and reverse transformation models are comprehensively used to perform geometric correction on the raster GIS data.The method can effectively solve the problem of coordinate offset of various GIS data and online map overlay,and achieve accurate spatial registration.

关 键 词：在线地图 坐标偏移 映射网络 变换 几何校正 

分 类 号：P208[天文地球—地图制图学与地理信息工程]