|
|
#include "geocomputation.h"
|
|
|
#include "Stream/ugdefs.h"
|
|
|
|
|
|
#include "erkir/sphericalpoint.h"
|
|
|
|
|
|
GeoComputation::GeoComputation()
|
|
|
{
|
|
|
|
|
|
}
|
|
|
|
|
|
/*@brief 计算两点间球面距离
|
|
|
* @param lon1(-180至180),lat1(-90到90) 经纬度点1(度)
|
|
|
* @param lon2,lat3 经纬度点2(度)
|
|
|
* @return 距离（m）
|
|
|
*/
|
|
|
double GeoComputation::getSphericalDistance(double lon1, double lat1, double lon2, double lat2)
|
|
|
{
|
|
|
erkir::spherical::Point p1{ lat1, lon1 };
|
|
|
erkir::spherical::Point p2{ lat2, lon2 };
|
|
|
double distance = p1.distanceTo(p2);
|
|
|
return distance;
|
|
|
}
|
|
|
|
|
|
/*@brief 根据起点坐标、方位角、距离，计算另一点坐标。
|
|
|
* startPoint:起始点地理坐标点（lat(-90到90)，lon(-180,180)）
|
|
|
* bearing:方位角(0-360)（度）
|
|
|
* dist:两点之间距离(m)
|
|
|
*/
|
|
|
QPointF GeoComputation::getDestinationPoint(double lon1, double lat1, double bearing, double dist)
|
|
|
{
|
|
|
erkir::spherical::Point p{ lat1, lon1 };
|
|
|
auto dest = p.destinationPoint(dist, bearing); // 51.5135°N, 000.0983°W
|
|
|
QPointF point(dest.longitude().degrees(),dest.latitude().degrees());
|
|
|
return point;
|
|
|
}
|
|
|
|
|
|
/*@brief 根据起点坐标、方位角、距离，计算另一点坐标。
|
|
|
* 使用Vincenty's公式求解,使用WGS-84椭球
|
|
|
* startPoint:起始点地理坐标点（lat(-90到90)，lon(-180,180)）
|
|
|
* bearing:方位角（度）
|
|
|
* dist:两点之间距离(km)
|
|
|
*/
|
|
|
QPointF GeoComputation::computeOffsetGeoPosition(double lon1, double lat1, double bearing, double dist)
|
|
|
{
|
|
|
QPointF endPoint;
|
|
|
//角度转化为弧度
|
|
|
// qreal lon1 = (fmod(startPoint.x()+540,360)-180.0)*PI/180;
|
|
|
lon1 = lon1*PI/180.0;
|
|
|
lat1 = lat1*PI/180.0;
|
|
|
bearing = bearing*PI/180.0;
|
|
|
dist = dist*1000;
|
|
|
|
|
|
//WGS-84椭球参数
|
|
|
double flat = 298.257223563;
|
|
|
double a = 6378137.0;
|
|
|
double b = 6356752.314245;
|
|
|
//开始求解坐标
|
|
|
double f = 1/flat;
|
|
|
double sb = sin(bearing);
|
|
|
double cb = cos(bearing);
|
|
|
double tu1 = (1-f)*tan(lat1);
|
|
|
double cu1 = 1/sqrt((1+tu1*tu1));
|
|
|
double su1 = tu1*cu1;
|
|
|
double s2 = atan2(tu1, cb);
|
|
|
double sa = cu1*sb;
|
|
|
double csa = 1-sa*sa;
|
|
|
double us = csa*(a*a - b*b)/(b*b);
|
|
|
double A = 1+us/16384*(4096+us*(-768+us*(320-175*us)));
|
|
|
double B = us/1024*(256+us*(-128+us*(74-47*us)));
|
|
|
double s1 = dist/(b*A);
|
|
|
double s1p = 2*PI;
|
|
|
|
|
|
|
|
|
double cs1m = 0.0;
|
|
|
double ss1 = 0.0;
|
|
|
double cs1 = 0.0;
|
|
|
double ds1 = 0.0;
|
|
|
|
|
|
while (abs(s1-s1p) > 1e-12)
|
|
|
{
|
|
|
cs1m = cos(2*s2+s1);
|
|
|
ss1 = sin(s1);
|
|
|
cs1 = cos(s1);
|
|
|
ds1 = B*ss1*(cs1m+B/4*(cs1*(-1+2*cs1m*cs1m)- B/6*cs1m*(-3+4*ss1*ss1)*(-3+4*cs1m*cs1m)));
|
|
|
s1p = s1;
|
|
|
s1 = dist/(b*A)+ds1;
|
|
|
}
|
|
|
|
|
|
double t = su1*ss1-cu1*cs1*cb;
|
|
|
double lat2 = atan2(su1*cs1+cu1*ss1*cb, (1-f)*sqrt(sa*sa + t*t));
|
|
|
double l2 = atan2(ss1*sb, cu1*cs1-su1*ss1*cb);
|
|
|
double c = f/16*csa*(4+f*(4-3*csa));
|
|
|
double l = l2-(1-c)*f*sa* (s1+c*ss1*(cs1m+c*cs1*(-1+2*cs1m*cs1m)));
|
|
|
double lon2 = lon1+l;
|
|
|
|
|
|
endPoint.setX(lon2*180/PI);
|
|
|
endPoint.setY(lat2*180/PI);
|
|
|
return endPoint;
|
|
|
}
|
|
|
|
|
|
//显示坐标转地图坐标
|
|
|
UGPoint2D GeoComputation::DPtoMP(UGMap *pMap, const QPoint &point)
|
|
|
{
|
|
|
UGDrawCache &drawing = pMap->GetDrawing()->m_DrawCache;
|
|
|
UGPoint DP(point.x(), point.y());
|
|
|
UGPoint2D LP(0,0);
|
|
|
drawing.DPtoLP(&DP, &LP, 1);
|
|
|
|
|
|
UGPoint2D MP(0, 0);
|
|
|
|
|
|
pMap->GetDrawing()->m_DrawParam.LPtoMP(LP, MP);
|
|
|
|
|
|
return MP;
|
|
|
}
|