摘要
从研究地图数字化中规则地物的几何约束条件出发，进一步探讨了数字化数据的平差模型和条件平差迭代计算方法，给出了其相应的精度评定指标，并在研制的1套实用数字化软件中实现．计算表明，对数字化数据进行平差处理和选代计算，对提高数字化的精度十分必要，而且由平差计算得到的中误差可以作为评定数字化结果的精度的1个参考目标。
This paper starts from the study of geometric contraints of features in map digitization, builds the mathematie adjustment models of digitized data and iterative algorithm of error equation, gives the corresponding precision evaluation value, and develops a digitizing software. Conclusions can be reached that it is necessary to adjust the digitized data, and it can he used as a precision reference to evaluate the digitizing result and control quality of GIS data effectively.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1998年第6期682-685,共4页
Journal of Tongji University:Natural Science
基金
国家自然科学基金!49671065
关键词
地理信息系统
地图数字化
平差模型
软件
GIS
Map digitization
Adjustment models
Data quality
Digitizing software
