【摘要】 数据是GIS的核心与投资重点,GIS数据包括空间数据和属性数据。位置误差主要来源于直接测量的误差、地图数字化的误差遥感数据的误差、数据转换误差、数据输入与存储误差。属性误差主要来源于拓扑分析误差、数据分类误差、文本文件数据的误差和人工解译误差。GIS误差还包括时效误差、逻辑一致性误差和数据完整性方面的误差。更多还原

【Abstract】 Data are the core and key investment in GIS. The data of GIS include space data and property data. Position errors are mainly from errors of direct measurement, digitalization of map, data input and store. The property errors are mainly from errors of topology analysis, data classification, document data and artificial translation. GIS errors also include secular errors,logical errors and other errors in data completeness.更多还原