纬度/经度坐标在amMap美国地图中不正确 [英] Latitude/Longitude coordinates are not correct in amMap USA map

问题描述

我正在使用usaLow.js地图构建地图.在地图初始化上，我调用返回此数据的json方法:

I am building a map using the usaLow.js map. On map init, I call a json method that returns this data:

[{latitude: "40.4258686",longitude: "-86.9080655"}]

使用此数据，我将使用以下数据添加到地图的数据提供程序(mapData):

With this data I add to the map's data provider (mapData) with this:

mapData.images = [];
for(var i = 0; i < resp.length; ++i){
  mapData.images.push({
    type: "circle",
    color:"#FF0000",
    latitude: parseFloat(resp[i].latitude),
    longitude: parseFloat(resp[i].longitude)
  });
}
map.validateData();

此位置应位于印第安纳州，但这是我看到标记的位置:

This location should be in Indiana, but this is where I see the marker:

不使用世界地图时，是否需要转换纬度/经度坐标?如果是这样，那该怎么办?

Do lat/long coordinates need to be converted when not using world maps? If so, how can that be done?

修复了JSON字符串错字

推荐答案

似乎您使用的是未经校准的美国地图. (usaLow.js)该地图出于视觉目的而变形，因此与真实的纬度/经度坐标不兼容.

It seems like you are using a non-calibrated US map. (usaLow.js) This map is distorted for visual purposes and thus not compatible with real latitude/longitude coordinates.

要解决此问题，您将需要使用已校准的其中一张地图.这些选项是:

To work around that, you will need to use one of the maps that are calibrated. The options are these:

它已针对美国本土进行了Mercator校准.标记应标出OK(除了阿拉斯加和夏威夷)，该区域已被置换.

It is Mercator-calibrated for mainland US. The markers should plot OK, except for Alaska and Hawaii, that area displaced.

此地图与阿拉斯加和夏威夷等坐标完全兼容.但是，它可能看起来不那么吸引人:

This map is fully compatible with coordinates, including Alaska and Hawaii. However, it might not look as appealing:

这两个地图都与JavaScript地图捆绑在一起.

Both of those maps are bundled with JavaScript Maps.

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