将笛卡尔(X，Y)转换为坐标GPS(纬度和经度) [英] Convert Cartesian (X,Y) to coordinates GPS (Latitude & Longitude)

问题描述

我需要将坐标X，Y转换为纬度和经度.我已经阅读了维基百科地图投影，类似的stackoverflow论坛，应用了我的自定义解决方案，但仍然无法正常工作.

I need to convert coordinates X, Y into Latitude and Longitude. I've read wikipedia map projections, similar stackoverflow forums, applied my custom solutions and still didn't work.

我从公式中获得的坐标是错误的，经度是可以接受的，但纬度是不可接受的.我看不出我的计算错误在哪里.

The coordinates I get from my formula are wrong, Longitude is acceptable but Latitude is not. I don't see where my calculous is wrong.

X，Y点是从JLayeredPane中获取的，其背景地图图像的大小，一旦在该地图图像上释放了较小的图像后，

The X,Y Point is taken from a JLayeredPane with the size of a background Map image, once a smaller image is released on this Map image, the point is taken.

public void mouseReleased(MouseEvent e) {               
    DM.setUpCoordinates(layeredPane.getComponent(index-1).getLocation());       
}

在此之后，我试图正确计算纬度和经度投影.我拥有的数据是:

After this, I'm trying to correctly calculate the Latitude and Longitude projection. The data I own is:

1. 地图上的X，Y坐标
2. 地图的总宽度和高度
3. 地图居中的经纬度

到目前为止我尝试过的内容:

What I have tryied so far:

尝试等角投影

public void setUpCoordinates(Point p) {     
    //Equirectangular projection: optimal for small streets 
    Long = ((p.getX())/(6371000*Math.cos(MG.getLati())))+MG.getLongi(); 
    Lat = (((p.getY())/6371000)+MG.getLati());
}

我也尝试从

I also tryied to implement the Mercator projection from this link with very little to no success at all.

我知道我没有在公式中使用地图上的总宽度和高度，这可能是错误，但是我不知道如何使用它！

I am aware I'm not using total width and height from the Map on my formulas and this might be the error, but I don't know how to use it!

对如何从(x，y)转换为(纬度，经度)有帮助吗?

any help how to convert from (x,y) to (latitude, longitude)?

谢谢

推荐答案

您需要按中心位置移动像素坐标，还需要使用地图比例尺-经度和纬度范围(我假设伸长率 Math.cos(MG.getLati())系数以经度比例表示)

You need to shift pixel coordinates by center position and also use map scale - longitude and latitude range (I assume that elongation Math.cos(MG.getLati()) coefficient is accounted in longitude scale)

Long = (p.getX() - MapWidth/2)*LongitudeRange/MapWidth  +MG.getLongi(); 
Lat = (p.getY() - MapHeight/2)*LatitudeRange/MapHeight + MG.getLati());

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