在矿区水文地质调查中应用手持GPS接收机

Use GPS receiver in hydrogeologic investigation of gold mining area

为提高手持GPS接收机在矿区水文地质调查中的点位定位精度,在不同地段选择6个测量已知控制点进行参数测定,在每个点上要求搜索到4颗以上卫星信号,定位时间5min以上。对投影方式及比例参数设定后,再利用矿区不同的测量已知点与手持GPS接收机测量点坐标进行对比。测量成果的可靠性和精确性取决于接收机、处理软件、所测卫星的图形强度和观测环境。经参数校准后,手持式GPS接收机单点定位精度优于±5m,可满足矿区1∶1万及更小比例尺水文地质调查对工程点位的精度要求。

To improve the point orientation precision of GPS receiver in hydrogeologic investigation of gold mining area, 6 known survey control points are selected to parameter test, over 4 satallite signals should be hunted out at every control point and the orientation time is not less 5 min. Contract the coordinate between different known survey points in mining area and the survey points by GPS receiver after establish the projection mode and scale parameter. The reliability and precision of the survey result depend on the receiver, software and the graphic intensity and observe circumstance of the satellite. After parameter correction, the point orientation precision of GPS receiver is within ±5 m and could satisfied the engineering drop precision require of 1∶10 000 or smaller scale hydrogeologic investigation.