得到覆盖控制只对某些* .geojson对象

Question

我阅读并格式化我的要素集合：

function onEachFeature(feature, layer) {
  if (feature.properties.popupContent == null)
       {return null}
       else
       {return layer.bindPopup(feature.properties.popupContent)};
 };

function MarkerStyle (feature,latlng) {
  if (feature.properties.markerSymbol == null)
  {return L.marker(latlng);}
  else
  {return L.marker(latlng, {icon:  L.icon({iconUrl:
                               feature.properties.markerSymbol})});}
  };

var daten =  $.ajax(overlay).done(function(data) {
    data = JSON.parse(data);
    daten = L.geoJson(data, 
            {pointToLayer: MarkerStyle,
            onEachFeature: onEachFeature}).addTo(map);
    return daten});

L.control.layers(baseLayers, overlayMaps).addTo(map);

有我的特征收集点和多边形。我如何添加一个覆盖控制只为多边形？我试图与过滤器，但没有奏效。感谢您阅读的代码！

格鲁斯，书呆子

谢谢你，我现在明白了，该过滤功能仅用于，减少功能，这些功能显示在地图上。对？这不是我的本意。

我想为特征集合中的每个多边形控制。我现在尝试：

  var polygons =  L.geoJSON();
  var overlayLayers = null; 
  var controls = L.control.layers(baseLayers,overlayLayers).addTo(map);

  function onEachFeature(feature, layer) {
    if(feature.properties.control != null)
        {polygons.addData(feature)
                .bindPopup(feature.properties.popupContent);
         polygons.addTo(map);
         polygon = polygons;
        controls.addOverlay(polygon,feature.properties.control);
        polygon = null;
        };
  if (feature.properties.popupContent == null)
       {return null}
            };

到目前为止是这种情况，我得到每个多边形控制。但是多边形才会消失，如果我取消所有多边形控制。我想停用单一多边形！

格鲁斯，书呆子

Answer 1

现在我已经找到了该任务的解决方案：

var overlayLayers = null; 
var controls = L.control.layers(baseLayers, overlayLayers).addTo(map);

function onEachFeature(feature, layer) {
    var ObjektLayer = L.geoJSON();
        ObjektLayer.addData(feature);
    if (feature.geometry.type == "Polygon" )
        {if (feature.properties.control != null)
            {controls.addOverlay(ObjektLayer,feature.properties.control);
            };
        if (feature.properties.popupContent != null)
            {ObjektLayer.bindPopup(feature.properties.popupContent);
            };
        ObjektLayer.addTo(map);  
        };
 };

格鲁斯，书呆子