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甲状腺 tri/ulation
原标题:Wifi trilateration/triangulation in android
  • 时间:2012-04-17 12:28:49
  •  标签:
  • android
  • wifi

I m 采用wifi三角地进行室内导航应用,

我有3个接驳点,每个点都有1个排入点。

            //1 
    double Lat0 = 26.0475994;
    double Lng0 = 50.5101893;

            //2 

    double Lat1 = 26.0474428;
    double Lng1 = 50.5096745;

        //3
    double Lat2 = 26.0477956;
    double Lng2 = 50.5097067;

我需要将每个排灯和安放器转换为X,y,z坐标,谁能帮助我使用这一公式? 我看到了前一个职位:here。 但是,我不会获得正确结果。

加上如果我获得X,那么,那是无法将其转换到lat子里的吗?

thanks

问题回答

从<条码>纬度/代码>和<条形码>改为<条码>x>/条码>和<条码>y坐标如下:

x = (radius of earth) * cos(latitude) * cos(longitude) //radians 
y = (radius of earth) * cos(latitude) * sin(longitude)

To convert back:

lat  = asin(y / (radius of earth)) // degrees
nong = atan(2 * x / y)             // degrees




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