大比例尺地形图数字化数据的精度分析与处理

对手工数字化地图的数据误差进行了理论研究，分析其误差来源，性质并对数据进行处理，对于系统误差，通过坐标转换来削弱，评定地图数字化的精度可有用模拟法，通过手工数字化地形图实验，得出误差的统计分布服从正态分布，根据随机误差的统计特性，建立距离模型，角度模型，面积模型，曲线模型等平差模型，并可根据实际情况将各基本模型组合成混合模型来提高数字化精度。

Precise analyzing and processing data of digitized big scale topographic map

This is a research about data error of manually digitized topographic map, with an analysis of its origin, quality of error and processing data. Systematic error may be decreased through coordinate transformation. Estimating precision of digitized map may adopt simulating method.An example illustrates that the method is feasible to study and analyze digitized precision. Through an experiment of manually digitized topographic map, it is concluded that statistical distribution of the error obeys normal one. According to the statistical characteristics of the random error, error processing model is found such as distance model, angle model, area model, curve model, mixed model which is formed by mixing basic models according to cases, thus precision can be increased.