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好的,我有这些来自 Google 地球的图像叠加数据,如下所示:

North: -7.340917
South: -7.34100
East: 112.751217
West: 112.751167
Rotation: 25.0000

并且我已经成功地将我的图像点 (x,y) 转换为 Lat, Lng 与这些功能:

static Double DEGREES_PER_RADIAN = 180 / Math.PI;
static Double RADIAN_PER_DEGREES = Math.PI / 180;

public static double Gudermannian(double y)
{
    return Math.atan(Math.sinh(y)) * DEGREES_PER_RADIAN;
}

public static double GudermannianInv(double latitude)
{
    double sign = Math.signum(latitude);
    double sin = Math.sin(latitude * RADIAN_PER_DEGREES * sign);
    return sign * (Math.log((1.0 + sin) / (1.0 - sin)) / 2.0);
}

Double mapLatNorth = -7.340917;
Double mapLatSouth = -7.34100;
Double mapLonWest = 112.751167;
Double mapLonEast = 112.751217;

Double ymax = GudermannianInv(mapLatNorth);
Double ymin = GudermannianInv(mapLatSouth);                 
Float latPoint = (float) Gudermannian(ymax - ( ((double) pointY / imgHeight) * (ymax - ymin) )) ;

Double mapLonDelta = mapLonEast - mapLonWest;
Float lngPoint = (float) (mapLonWest + pointX / imgWidth * mapLonDelta);

我从中得到的价值观

latPoint

lngPoint

是正确的,但是它还没有旋转。我的问题是:如何将这些纬度/经度值旋转 25 度?

我未能从 Ewan Todd 在从 kml-file 计算地面覆盖角的纬度/经度值中获得纬度/经度值

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1 回答 1

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这应该可以通过简单的 2D 旋转来实现,并且应该是这样的:

public Float rotateLatitudeAround(Float lat, double angle, Point center) {
    lat = center.lat + (Math.cos(Math.toRadians(angle)) * (lat - center.lat) - Math.sin(Math.toRadians(angle)) * (lon - center.lon));
    return lat;
}

public Float rotateLongitudeAround(Float lon, double angle, Point center) {
    lon = center.lon + (Math.sin(Math.toRadians(angle)) * (lat - center.lat) + Math.cos(Math.toRadians(angle)) * (lon - center.lon));
    return lon;
}

但改变

center.lat 

center.getLatitudeE6()/1E6 

或者其他的东西。

编辑:我确实忘记了这仅适用于点 x,y。但是您可以先获取与地图投影中心相关的纬度、经度点,然后从投影反向地图中获取经度、经度值?

于 2013-08-31T21:39:50.657 回答