两种坐标校正方法的精度仿真分析

坐标校正方法的恰当选取是利用纸质地图进行空间数据录入过程中的重要步骤,它严重地影响着空间数据的质量。基于地理坐标的校正法与基于投影坐标的校正法是目前普遍使用的两种坐标校正方法。该文以MapGIS软件为主要工具,对基于高斯-克吕格(Gauss-Krüger)投影的多种比例尺地图分别进行了两种不同坐标校正过程的仿真,得到了不同坐标校正方法的误差值统计特征,定量地比较了两者之间的优劣性。对测量数据处理、计算机制图及空间数据生产具有指导意义。

Emulation Analysis of the Precisions in Two Coordinates Correction Approaches

Selecting a proper coordinates correction approach is a rather significant stage during the spatial data input from paper maps,which exerts a strong impact on data quality.There are two main coordinates correction approaches:correction approach based on geographic location and correction approach based on projection location.Using software MapGIS as a main tool,this paper emulates the two coordinates correction approaches of several different scale maps with Gauss-Krüger projection.The statistics of correction error values are obtained,which can indicate quantitatively the respective advantages of two coordinates correction approaches.The emulation conclusion can be applied to cartographic data processing,computer aided mapping and spatial data producing.