傳單地圖，通過按鈕獲取geojson文件的特定數據

Question

我試圖用按鈕在我的地圖上顯示我的geojson文件的特定值（data.geojson）。 （例如，僅繪制值“ domaine”：“ violences”的地圖）

我是否想通過地圖上的按鈕來依賴我的數據（“ domaine”：“ violences”或其他）？

非常感謝您抽出寶貴的時間。 我的js：

 <script type="text/javascript"> var map = L.map('map'); var terrainTiles = L.tileLayer('http://stamen-tiles-{s}.a.ssl.fastly.net/toner-lite/{z}/{x}/{y}.{ext}', { attribution: 'Map tiles by <a href="http://stamen.com">Stamen Design</a>, <a href="http://creativecommons.org/licenses/by/3.0">CC BY 3.0</a> &mdash; Map data &copy; <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a>', subdomains: 'abcd', minZoom: 0, maxZoom: 20, ext: 'png' }); terrainTiles.addTo(map); map.setView([46.5160000, 6.6328200], 10); L.control.locate(location).addTo(map); function addDataToMap(data, map) { var dataLayer = L.geoJson(data, { onEachFeature: function(feature, layer) { var popupText = "<b>" + feature.properties.nom + "<br>" + "<small>" + feature.properties.localite + "<br>Rue: " + feature.properties.rue + + feature.properties.num + "<br>Téléphone: " + feature.properties.tel + "<br><a href= '" + feature.properties.url + "'>Internet</a>"; layer.bindPopup(popupText); } }); dataLayer.addTo(map); } $.getJSON("data.geojson", function(data) { addDataToMap(data, map); }); </script> </body> </html> 

data.geojson

{
"type": "FeatureCollection",
"features": [
{
"type": "Feature",
"geometry": {
   "type": "Point",
   "coordinates":  [ 6.1200622,46.2106091 ]
},
"properties": {
  "nom":"Centre d'entraînement aux méthodes d'éducation active - Genève",
  "rue":"Route des Franchises",
  "num":"11",
  "npa":1203,
  "localite":"Genève",
  "canton":"GE",
  "tel":"022 940 17 57",
  "url":"www.formation-cemea.ch",
  "domaine":"formation   "
}
  },

  {
"type": "Feature",
"geometry": {
   "type": "Point",
   "coordinates":  [ 6.1243056,46.2120426 ]
  },
"properties": {
  "nom":"VIRES",
  "rue":"Rue Ernest-Pictet ",
  "num":"10",
  "npa":1203,
  "localite":"Genève",
  "canton":"GE",
  "tel":"022 328 44 33",
  "url":"www.vires.ch",
  "domaine":"violences   "
  }
}

Answer 1

至於切換類別，您可以使用Leaflet Layers Control L.control.layers 。

至於按類別（在您的情況下為“域”） 對要素進行分組，請參閱我在評論中鏈接的文章： 傳單：如何從單個集合切換GeoJSON要素屬性？

您甚至可以通過直接使用Layer Groups L.layerGroup而不是使用中間數組來稍微簡化它。

var categories = {},
    category;

var layersControl = L.control.layers(null, null).addTo(map);

function addDataToMap(data, map) {
  L.geoJson(data, {
    onEachFeature: function(feature, layer) {
      category = feature.properties.domaine;
      // Initialize the category layer group if not already set.
      if (typeof categories[category] === "undefined") {
        categories[category] = L.layerGroup().addTo(map);
        layersControl.addOverlay(categories[category], category);
      }
      categories[category].addLayer(layer);
    }
  });
  //dataLayer.addTo(map); // no longer add the GeoJSON layer group to the map.
}

$.getJSON("data.geojson", function(data) {
  addDataToMap(data, map);
});

演示： https ： //plnkr.co/edit/H6E6q0vKwb3RPOZBWs27？p = preview