GeoJSON MultiPoint没有显示在地图上

Question

var feature = {
    "type": "feature",
    "properties": {
        "style": {
            "color": "#004070",
            "weight": 4,
            "opacity": 1
         }
     },
    "geometry": {
        "type": "MultiPoint",
        "coordinates": [[
            [0.25, 51.47],
            [0.26, 51.47],
            [0.27, 51.47]
        ]]
    }
};

var geojsonLayer = new L.GeoJSON(feature);
map.addLayer(geojsonLayer);

我正在尝试在地图上显示以上三点。为什么标记不出现？

Answer 1

确保您的GeoJSON数据符合规范。您有可用的在线整理工具，例如http://geojsonlint.com/和http://geojson.io/

在您的情况下：

• "Feature" 类型必须大写。
• "coordinates"对于"MultiPoint"几何类型必须是位置/坐标的阵列。但是你有一个坐标数组的数组。（额外一级）

一旦纠正了这两个错误，一切都会起作用：

var map = L.map('map');

var feature = {
  "type": "Feature",
  "properties": {
    "style": {
      "color": "#004070",
      "weight": 4,
      "opacity": 1
    }
  },
  "geometry": {
    "type": "MultiPoint",
    "coordinates": [
      [0.25, 51.47],
      [0.26, 51.47],
      [0.27, 51.47]
    ]
  }
};
var geojsonLayer = new L.GeoJSON(feature);
map.addLayer(geojsonLayer).fitBounds(geojsonLayer.getBounds());

L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
  attribution: '&copy; <a href="http://osm.org/copyright">OpenStreetMap</a> contributors'
}).addTo(map);

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<div id="map" style="height: 180px"></div>