利用GPS水准控制山区高程——以陕西丁家林金矿区为例

应用GPS水准控制山区高程的基本原理是当GPS点布设成一定区域时，可以用数学曲面拟合法求待定点的正常高，根据测区中已知点的平面坐标或大地坐标和高程异常值，用数字拟合法求出该区似大地水准面，得出等求点的正常高。在陕西丁家林金矿区实验结果表明，该方法与传统的三角高程控制法相比，无论在平原或在山区都能获得较好精度。因此，用GPS水准可替代几何水准。

Controlling the mountain area height by GPS level:Taking example of Dingjialin gold mine

The basic principle of controlling the Mountain area height by GPS level is that when the GPS spots are arranged in the certain area, the normal height of the uncertain spot will be acquired by the mathematical cure fitting method. Based on plane coordinate or geodetic coordinate and height anomalous value of the known spots in the center of surveyed area, in mathematical fitting method, the geodetic water level of the area was obtained, and the normal height of the uncertain spots were right worked out. The experiment of Dingjialin gold mine shows that the method could make greater precision in plain ormountain area than traditional trigonometric vertical control method. Therefore, the geometric level is considered to be replaced by GPS level.