本文介绍了将距离添加到 GPS 坐标的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
I'm trying to generate some points at random distances away from a fixed point using GPS.
How can I add distance in meters to a GPS coordinate? I've looked at UTM to GPS conversion but is there a simpler method to achieve this?
I'm working on Android platform just in case.
Cheers, fgs
解决方案
- P0(lat0,lon0) : initial position (unit : degrees)
- dx,dy : random offsets from your initial position in meters
You can use an approximation to compute the position of the randomized position:
lat = lat0 + (180/pi)*(dy/6378137)
lon = lon0 + (180/pi)*(dx/6378137)/cos(lat0)
This is quite precise as long as the random distance offset is below 10-100 km
Edit: of course in Java Math.cos() expects radians so do use Math.cos(Math.PI/180.0*lat0) if lat0 is in degrees as assumed above.
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