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。
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.
通过误差来源的分析和误差模型的建立，提出了一种车辆导航中gps定位测量与数字地图实时配准的地图匹配算法。
According to the given source and mathematic model of matching error, a algorithm for real time matching of GPS positioning results and digital maps is put forward.
地籍信息系统的宗地合并操作时常会失效，其原因是实际测量的宗地图形与系统要求的理想化宗地图形有一定的差异。
Sometimes the operation of merging parcel in cadastral information systems may become invalidation, since there are some gaps between surveyed parcel graph and idealization graph.
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