摘要
本文介绍的方法与传统方法相比较主要是投影距的概念、几何意义、长度值及其个数不同。这里所谓的投影距,是指工程点i所在坐标格网的下限坐标纵、横线和勘探线相交的两个交点及其与工程点的连线,该线段在勘探线上的投影(△Xi,△Yi);实质上就是以上述两个交点为依据,计算工程点沿勘探线方向的坐标增量。其数值小,长度短,作图方便,无坐标格网的累积误差,而且有检核。这恰好弥补了传统方法的不足。又采用电算器程序计算,工作效率高。
This paper defines the projection distance as the projection of the lines between the engineering point and the intersection points of the prospecting line with the longitudinal and latitudinal lines of the coordinate net in which the engineering point is located on the prospecting line. Actually, it is the coordinate increments (△X_i, △Y_i) of the engineering point along the prospecting line from the above two intersection points. By this definition, the proiection distance is characterized by small numeric value and short length, which is easy to draw in the map and no cumulation error from the coordinate net and can be checked, by which remedy the deficit of the traditional methods.
出处
《湖南地质》
1990年第1期72-77,共6页
Hunan Geology
关键词
坐标增量
投影距
偏差
勘探线
Coordinate increment calculation method
Projection distance
Deviation of engineering point
Prospecting line
