Exemple #1
0
        //WGS-84 to GCJ-02
        private void Wgs84ToGcj02()
        {
            if (Wgs84 == null || this.outOfChina(Wgs84))
            {
                Gcj02 = Wgs84;
            }
            var t = this.delta(Wgs84);

            Gcj02.lng = t.lng + Wgs84.lng;
            Gcj02.lat = t.lat + Wgs84.lat;
        }
Exemple #2
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        //GCJ-02 to WGS-84
        private void Gcj02ToWgs84()
        {
            if (Gcj02 == null || this.outOfChina(Gcj02))
            {
                Wgs84 = Gcj02;
            }
            var t = this.delta(Gcj02);

            Wgs84.lng = Gcj02.lng - t.lng;
            Wgs84.lat = Gcj02.lat - t.lat;
        }
Exemple #3
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 private bool outOfChina(Gps _t)
 {
     if (_t.lng < 72.004 || _t.lng > 137.8347)
     {
         return(true);
     }
     if (_t.lat < 0.8293 || _t.lat > 55.8271)
     {
         return(true);
     }
     return(false);
 }
Exemple #4
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        private Gps delta(Gps t)
        {
            var a      = 6378245.0;              //  a: 卫星椭球坐标投影到平面地图坐标系的投影因子。
            var ee     = 0.00669342162296594323; //  ee: 椭球的偏心率。
            var dLat   = this.transformLat(t.lng - 105.0, t.lat - 35.0);
            var dLng   = this.transformLng(t.lng - 105.0, t.lat - 35.0);
            var radLat = t.lat / 180.0 * PI;
            var magic  = Math.Sin(radLat);

            magic = 1 - ee * magic * magic;
            var sqrtMagic = Math.Sqrt(magic);

            return(new Gps()
            {
                lat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * PI), lng = (dLng * 180.0) / (a / sqrtMagic * Math.Cos(radLat) * PI)
            });
        }
Exemple #5
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 public GpsHelper(Gps _v, GpsType type)
 {
     if (type == GpsType.Wgs84)
     {
         Wgs84 = _v;
         Wgs84ToDfm();
         Wgs84ToGcj02();
         Gcj02ToBd09();
     }
     else if (type == GpsType.Gcj02)
     {
         Gcj02 = _v;
         Gcj02ToWgs84();
         Wgs84ToDfm();
         Gcj02ToBd09();
     }
     else if (type == GpsType.Bd09)
     {
         Bd09 = _v;
         Bd09ToGcj02();
         Gcj02ToWgs84();
         Wgs84ToDfm();
     }
 }