1980西安坐标系向2000国家坐标系转换省级兴趣点数据成果分析  

Analysis of the Transformation of Provincial Level POIData from 1980 Xi′an Coordinate System to ChinaGeodetic Coordinate System 2000

作　　者：王宁娜 WANG Ningna(Guangxi Armed Police Corps Comprehensive Information Security Center,Nanning 530029,China)

机构地区：[1]武警广西总队综合信息保障中心,广西南宁530029

出　　处：《测绘与空间地理信息》2021年第1期181-184,共4页Geomatics & Spatial Information Technology

摘　　要：首先介绍了1980西安高斯平面坐标系向2000国家高斯平面坐标系转换的两种常用方法:改正量插值法、二维七参数法。其次,在广西测区内,以1∶10000比例尺图幅为单元,选取16个(2组,每组8个)图幅为试验区域,选取3×3块兴趣点数据,使用两种方法进行坐标转换,以从自然资源部获取的2000坐标为真值,分析两种转换成果。结果表明,两种成果均能满足1∶10000平面精度要求,改正量插值法较二维七参数法精度更高,且各图幅精度较均匀。改正量插值法最大点位误差为0.057 m,二维七参数法最大点位误差为0.679 m,出现在北海市。This paper discussed two methods transforming 1980 Xi′an coordinate system to CGCS 2000,corrected interpolation method and 2D seven-parameter coordinate transformation method.In Guangxi Region,the author first selected 16 map sheets at the scale of 1∶10000 as test region(2 groups,8 map sheets per group),chose 3×3 pieces of POI data in each map sheet.Then two methods were used to carry out coordinate transformation and made a comparing analysis with data obtained from Ministry of Natural Resources as true value.The results show the two methods meet the accuracy requirement(1 m)and the corrected interpolation method is more accurate than the 2D seven-parameter coordinate transformation method.The largest point position error with the corrected interpolation method is 0.057 m,that with the 2D seven-parameter coordinate transformation method is 0.679 m,and it appears in Beihai city.

关 键 词：坐标转换 2000国家坐标系 兴趣点数据 改正量插值法 二维七参数法 

分 类 号：P226.3[天文地球—大地测量学与测量工程]