如何利用初始点、距离和方位角计算endPoint？
如何利用初始点、距离和方位角计算endPoint？
提问于 2020-08-19 05:11:58
我需要使用起点、距离和方位角来找到终点。下面是每个参数的值：
latitude: 37.624942,
longitude": -7.896333,
azimute: 233.0
distance : 20.0下面是我的函数：
private List<double> findEndPoint(string latitudeStart, string longitudeStart, string azimute,double distancia)
{
List<double> endPoint = new List<double>();
double latitudeStartDouble = Convert.ToDouble(latitudeStart, System.Globalization.CultureInfo.InvariantCulture);
double longitudeStartDouble = Convert.ToDouble(longitudeStart, System.Globalization.CultureInfo.InvariantCulture);
double azimuteDouble = Convert.ToDouble(azimute, System.Globalization.CultureInfo.InvariantCulture);
double azimuteRadians = ConvertToRadians(azimuteDouble);
double R = 6371.0; // Raio da Terra em km
double latitudeEnd = Math.Asin(Math.Sin(latitudeStartDouble) * Math.Cos(distancia / R) +
Math.Cos(latitudeStartDouble) * Math.Sin(distancia / R) * Math.Cos(azimuteRadians));
endPoint.Add(latitudeEnd);
double longitudeEnd = longitudeStartDouble + Math.Atan2(
Math.Sin(azimuteRadians) * Math.Sin(distancia / R) * Math.Cos(latitudeStartDouble),
Math.Cos(distancia / R) - Math.Sin(latitudeStartDouble) * Math.Sin(latitudeEnd));
endPoint.Add(longitudeEnd);
return endPoint;
}它返回：
latitude: -0.0760588400705975
longitude:-7.8988473639987093纬度一定是错的，但我不知道为什么它会给我这个值。
回答 2
Stack Overflow用户
发布于 2020-08-19 05:42:40
您忘记添加latitudeStartDouble。你只需计算增量即可。所以latitudeEnd = latitudeStartDouble + ...etc...
Stack Overflow用户
发布于 2020-08-19 18:18:41
我需要处理弧度，然后将其转换回度数：
private List<double> findEndPoint(string latitudeStart, string longitudeStart, string azimute,double distancia)
{
List<double> endPoint = new List<double>();
double latitudeStartDouble = Convert.ToDouble(latitudeStart, System.Globalization.CultureInfo.InvariantCulture);
latitudeStartDouble = ConvertToRadians(latitudeStartDouble);
double longitudeStartDouble = Convert.ToDouble(longitudeStart, System.Globalization.CultureInfo.InvariantCulture);
longitudeStartDouble = ConvertToRadians(longitudeStartDouble);
double azimuteDouble = Convert.ToDouble(azimute, System.Globalization.CultureInfo.InvariantCulture);
double azimuteRadians = ConvertToRadians(azimuteDouble);
double R = 6371; // Raio da Terra em km
double latitudeEnd = Math.Asin(Math.Sin(latitudeStartDouble) * Math.Cos(distancia / R) +
Math.Cos(latitudeStartDouble) * Math.Sin(distancia / R) * Math.Cos(azimuteRadians));
latitudeEnd = ConvertToDegrees(latitudeEnd);
endPoint.Add(latitudeEnd);
double longitudeEnd = longitudeStartDouble + Math.Atan2(Math.Sin(azimuteRadians) * Math.Sin(distancia / R) * Math.Cos(latitudeStartDouble),
Math.Cos(distancia / R) - Math.Sin(latitudeStartDouble) * Math.Sin(latitudeEnd));
longitudeEnd = ConvertToDegrees(longitudeEnd);
endPoint.Add(longitudeEnd);
return endPoint;
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/63476695
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