摘要
针对基础地理信息数据更新的现状,综合分析了利用数字正射影像图进行矢量化数据采集以更新DLG的误差源、未变要素在DLG与DOM中的偏差,并进行了更新成果精度分析,实例表明,分析结果合理、可行。
Aimed the updating of GIS data, this paper has analyzed the precision source from updating DLG with digital orthographic vectorization maps, which based on the national standard of DOM precision, and partial of nochange elements between DLG and DOM. Moreover, it has estimated the precision of the renewed production. The practice proves that the result is reasonable and feasible.
出处
《地理空间信息》
2008年第2期38-39,共2页
Geospatial Information
关键词
数字正射影像图
要素更新
平面精度
DLG
digital orthophoto maps
updated core elements
plan precision
DLG
