地图扫描数字化系统误差分析及对策探讨

Analysis and Discussion of Map Scanning Digitization System Error and Its Countermeasure Consideration

较全面地分析了地图扫描数字化的系统误差来源及影响。在系统误差纠正模型的选取过程中所采用的数据存在粗差,纠正模型的误差和模型数据的粗差是值得讨论的问题。利用粗差拟准检定法探测粗差准确的优点和判断函数模型的准则理论,提出顾及粗差的系统误差回归函数分析,先确定回归函数,在此基础上进行粗差探测与剔出,然后再进行回归分析,以达到消弱系统误差最优的目的。

This paper has comprehensively analyzed the map scanning system error origin and the influence. In the selection of correction model of system error, the random error of selection model and the gross error of data used in the model are worth discussing. The paper uses the merit of quasi-accurate detection of gross error and the judgment function model criterion, and takes system error into consideration in system error regression function analysis. In the first, it determines the regression function, pick out the gross errors. Then it carries on the regression analysis again. In the end, it realizes the goal to weaken the gross errors.