我在计算两个地理点之间的距离时遇到问题.
地理位置是:
position1 = mapView.getProjection().fromPixels( (int) e.getX(),(int) e.getY());
而另一个
double lat = 35.1064; double lng = 22.556412; GeoPoint position2 = new GeoPoint((int)(lat * 1E6),(int)(lng * 1E6));
然后我创建了两个位置:
Location loc = new Location(""); loc.setLatitude(position1.getLatitudeE6()); loc.setLongitude(position1.getLongitudeE6()); Location loc2 = new Location(""); loc.setLatitude(position2.getLatitudeE6()); loc.setLongitude(position2.getLongitudeE6());
然后我计算距离:
float distance = loc.distanceTo(loc2);
我围绕它:
Math.round(distance);
但我得到的结果如下:
1.4331783E7
我究竟做错了什么?
解决方法
尝试按照我的方法,
/** * * @param lat1 Latitude of the First Location * @param lng1 Logitude of the First Location * @param lat2 Latitude of the Second Location * @param lng2 Longitude of the Second Location * @return distance between two lat-lon in float format */ public static float distFrom (float lat1,float lng1,float lat2,float lng2 ) { double earthRadius = 3958.75; double dLat = Math.toRadians(lat2-lat1); double dLng = Math.toRadians(lng2-lng1); double a = Math.sin(dLat/2) * Math.sin(dLat/2) + Math.cos(Math.toRadians(lat1)) * Math.cos(Math.toRadians(lat2)) * Math.sin(dLng/2) * Math.sin(dLng/2); double c = 2 * Math.atan2(Math.sqrt(a),Math.sqrt(1-a)); double dist = earthRadius * c; int meterConversion = 1609; return new Float(dist * meterConversion).floatValue(); }