在Google地图上显示OpenStreetMap边界(使用v3 API)

问题描述：

我想使用我通过以下工具获得的GeoJSON数据在Google Map上显示城市边界.

I want to display the city boundary on the Google Map using GeoJSON data which I get using the following tools.

我去了nominatim.openstreetmap.org并搜索了一个城市(例如丹佛)
使用检索到的OSM ID(在本例中为253750)，我已经使用在线工具(polygons.openstreetmap.fr)生成了GeoJSON文件-看起来像这样
之后，我下载了文件，并尝试使用以下简单方法将此GeoJSON数据加载到我的地图中:
After that, I've downloaded the file and tried to load this GeoJSON data into my map using simple:
```
map.data.loadGeoJson(
            'http://domain.com/example.json');
```
但是，在我的控制台中，我收到了一个错误:

But, in my console I got an error:
```
Uncaught InvalidValueError: not a Feature or FeatureCollection
```
问题在于，即使以上工具生成了GeoJSON格式，也无法将其识别为标准格式.那么，这之间是否还有其他步骤?或者我在这里丢失了一些东西?

The problem is that even though the above tool generates GeoJSON format, it's not recognized as the standard one. So is there an extra step between or I'm missing something here?

You need to take the data you retrieve from Open Street Maps and put it into the place in the Feature/FeatureCollection JSON that the GeoJson parser is expecting:

var geoJson = {
  "type": "FeatureCollection",
  "features": [{
    "type": "Feature",
    "geometry": {},
    "properties": {}
  }];
// where "geoJsonData" is the data you retrieved
geoJson.features[0].geometry = geoJsonData;

示例小提琴(带有来自发布链接的数据)

在Google地图上显示OpenStreetMap边界(使用v3 API)

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