数字填图系统中数字实测剖面的校正

Digital Geological Section Correction in Regional Geological Mapping System

数字化填图系统中生成的剖面线与实际的剖面测量路线不能完全重合,且随着剖面的增长偏差会越来越大。分析了野外实测地质剖面测量过程中误差产生的来源,主要有设备误差、人为误差和环境影响误差三大类。提出了以在剖面中添加控制点的方式对实测剖面进行校正的方法,控制点由剖面的起点、终点、特殊地貌点和重要地质界线点等组成;给出了剖面校正的计算公式;借助Excel输入公式,通过剖面中的控制点完成剖面各导线方位角、坡角和坡距的校正,将校正好的数据重新导入数字剖面系统,生成剖面,实践验证了该方法的有效性。

The sectional lines produced in the regional geological mapping system can not perfectly coincide with the real sectional lines. The declination between the two kinds of lines increases with the growth of the section. The sources of the declinations occurring in the real measuring process of the outdoor geological section are ana- lyzed. The declinations mainly happen in equipment, human operations and environment. In this article the correction ways are introduced in the real measuring sections by adding some controlling points including the starting points, terminal points, special landform points and the important geological points. The calculate for- mulas for the correction of the section are worked out. The correction of the azimuth, slope and the sloping dis- tance of the sectional leading lines can be done by controlling points in the section and the entering formulars in the Excel. After correction, the new datum are put into the regional geological mapping system, and new sec- tions are produced. This method is proved effective.