空间基准数据转换系统设计与实现  

Design and Implementation of Spatial Datum Data Transformation System

作　　者：曾晨曦 李志才[2,3] ZENG Chenxi;LI Zhicai(Proficiency Skill Appraisal and Guidance Center of Natural Resources Ministry,Beijing 100830,China;National Geomatics Center of China,Beijing 100830,China;Key laboratory of Navigation&LocationBased Service,Ministry of National Resources,Beijing 100830,China)

机构地区：[1]自然资源部职业技能鉴定指导中心,北京100830 [2]国家基础地理信息中心,北京100830 [3]自然资源部导航与位置服务重点实验室,北京100830

出　　处：《地理信息世界》2021年第2期100-104,共5页Geomatics World

基　　金：国家重点研发计划项目(2016YFB0501405)资助。

摘　　要：面对我国对境外地理信息建设需求以及国内外测绘基准不一致问题,提出通过建设空间基准数据转换系统解决全球地理信息资源基准一致性的难题。通过收集不同国家的基准数据,首先建立空间基准数据库,该库收集了全球200多个国家和地区556个坐标系统和1194条坐标转换参数;再通过分析和研究各国空间基准框架差异性,建立空间基准数据转换系统,初步实现大地基准和高程基准的统一,为境外地理信息资源统一到我国法定基准框架提供技术支持;最终建立以我国2000国家大地坐标系(CGCS2000)及1985国家高程基准为标准的,包含多国多地区多空间(高程)参考的,转换存储体系和安全高效的空间基准数据转换系统,初步满足经济发展对基准统一的需求。In the face of Chinese demand for constructin goverseas geographic information and the inconsistency of geodetic datum between China and abroad,this paper proposes an approach to build a spatial datum transformation system to solve the problem of datum inconsistency of global geographic information resources.We constructed the spatial datum database consisting of 556 coordinate systems and 1194 coordinate transformation parameters from more than 200 countries and regions around the world.We also investigated the differences of spatial datum frames of various countries and established the spatial datum transformation system.This system not only unifies the geodetic datum and height datum,but also provides technical supports for the unification of overseas geographic resourcewith Chinese legal datum framework.Finally,the transformation system and the efficient spatial datum transformation system were builtwithChinese geodetic coordinate system 2000(CGCS 2000)and 1985 National elevation datum as spatial references.The system serves for reference frame unification.

关 键 词：空间基准数据库 大地基准 高程基准 转换系统 

分 类 号：P208[天文地球—地图制图学与地理信息工程]