Google Maps v3 - 为什么LatLngBounds.contains返回false [英] Google Maps v3 - Why is LatLngBounds.contains returning false

问题描述

我有以下代码，我期望contains方法返回true，但它返回false：

  var界限=新google.maps.LatLngBounds（
新google.maps.LatLng（55.38942944437183，-2.7379201682812226）
新google.maps.LatLng（54.69726685890506，-1.2456105979687226）
）的
 
 var center = bounds.getCenter（）; //（55.04334815163844，-1.9917653831249726）
 
 var x = bounds.contains（center）; //返回false 
  

在同一页上，map是对Map对象的引用，以下代码将按预期返回true：

  map.getBounds（）。contains（map.getBounds（）。getCenter（））
  

为什么我要调用 bounds.contains 假？

解决方案

google.maps.LatLngBounds 构造函数需要SouthWest和NorthEast LatLng 参数。我不知何故地弄乱了我的坐标，并在NorthWest和SouthEast传递！

  var bounds = new google.maps.LatLngBounds（
 new google.maps.LatLng（54.69726685890506，-2.7379201682812226），
 new google.maps.LatLng（55.38942944437183，-1.2456105979687226）
）; 
 
 var center = bounds.getCenter（）; //仍然返回（55.04334815163844，-1.9917653831249726）
 
 var x = bounds.contains（center）; //现在返回true 
  

获得的经验： getCenter 不关心你是否用NorthWest和SouthEast创建了 LatLngBounds ，但是如果你想要包含来返回一个有用的答案，你最好通过建议的西南和东北！

I have the following code in which I would expect the contains method to return true, but it returns false:

var bounds = new google.maps.LatLngBounds(
    new google.maps.LatLng(55.38942944437183, -2.7379201682812226),
    new google.maps.LatLng(54.69726685890506, -1.2456105979687226)
);

var center = bounds.getCenter();  // (55.04334815163844, -1.9917653831249726)

var x = bounds.contains(center);  // returns false

On the same page, where map is a reference to the Map object, the following code returns true as expected:

map.getBounds().contains(map.getBounds().getCenter())

Why might my call to bounds.contains be returning false?

解决方案

Ah, brilliant. The google.maps.LatLngBounds constructor expects SouthWest and NorthEast LatLng parameters. I have somehow bungled up my coordinates and passed in NorthWest and SouthEast instead!

var bounds = new google.maps.LatLngBounds(
    new google.maps.LatLng(54.69726685890506,-2.7379201682812226),
    new google.maps.LatLng(55.38942944437183, -1.2456105979687226)
);

var center = bounds.getCenter();  // still returns (55.04334815163844, -1.9917653831249726)

var x = bounds.contains(center);  // now returns true

Lesson learned: getCenter doesn't care if you created the LatLngBounds with NorthWest and SouthEast instead, but if you want contains to return a useful answer you better pass in the suggested SouthWest and NorthEast!

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