javascript - 你如何将来自服务器的普通地理 json 转换为 geoJson？

Question

我有一个带有普通 json 格式地理数据的服务器，我需要将其更改为 geojson 格式，以便 Mapbox 可以读取它。你怎么做到这一点？

例如，如何转换：

[
  {
    "id": 0,
    "name": "Hotel",
    "icon": "Sleep",
    "address": "SampleStreet 34",
    "latitude": 12,
    "longitude": 55
  }
]

进入这个：

{
"type": "FeatureCollection",
  "features": [
    {
    "id": 0,
    "type": "Feature",
    "properties": {
      "placeID": 0,
      "name": "Hotel",
      "icon": "sleep",
      "addressFormatted": "SampleStreet 34"
    },
    "geometry": {
      "type": "Point",
      "coordinates": [
        12,
        55
      ]
    }
}

标签： javascriptreact-nativemapboxgeojsonreact-native-mapbox-gl

Answer 1

如果您使用 ES6，那么这样的东西可能对您JSON.stringify有用，如果您可以直接使用生成的对象，则可能不需要。

const data = [
  {
    id: "0",
    name: "Hotel",
    icon: "Sleep",
    address: "SampleStreet 34",
    latitude: "12",
    longitude: "55"
  },
  {
    id: "1",
    name: "Landmark",
    icon: "Star",
    address: "SampleStreet 1234",
    latitude: "99",
    longitude: "100"
  }
];

const geojson = {
  type: "FeatureCollection",
  features: data.map(item => {
    return {
      id: item.id,
      type: "Feature",
      properties: {
        placeID: item.id,
        name: item.name,
        icon: item.icon,
        addressFormatted: item.address
      },
      geometry: {
        type: "Point",
        coordinates: [item.latitude, item.longitude]
      }
    };
  })
};

console.log(geojson);
console.log(JSON.stringify(geojson));