地图对GIS空间数据误差的影响初探  

On the effect of map on the error in GIS spatial data

作　　者：宋军林[1] 

机构地区：[1]宝鸡文理学院地理科学与环境工程系,陕西宝鸡721007

出　　处：《宝鸡文理学院学报（自然科学版）》2004年第1期70-72,共3页Journal of Baoji University of Arts and Sciences(Natural Science Edition)

摘　　要：GIS(geographyinformationsystem)数据质量是GIS研究和应用首要问题,GIS数据误差测量已成为该领域研究的热点。现有点、线、面模型都是空间数据获得后的检验模型。而GIS实践中,要根据用户提出的精度确定数据源,即首先有一个误差的限定范围,这要求分析GIS中空间数据误差的来源。地图是GIS重要的误差源,其误差与比例尺、地图概括和地图图形有关,在选择GIS数据的源地图时应综合考虑它们的影响。The chief problem in the study and application of GIS is the quality of GIS data. The measurement error of GIS data has become the hotspot in the research field. The existing models of spot,line and surface in map are the testing model after the spatial data have been collected. However, in the practice of GIS, data resource is chosen according to the precision provided by GIS user, namely, a limited range of error is required first of all, it is required to analyze the source of the error of spatial data in GIS. Map is the major source of error in GIS. The error is related to the scale,generalization and graphics of map. It is necessary to take them into account comprehensively when we choose the data source of GIS.

关 键 词：地理信息系统 空间数据 误差 地图 

分 类 号：P208[天文地球—地图制图学与地理信息工程]