問題描述
我目前正在使用 Leaflet 庫進行地圖可視化.我也在使用 markercluster 插件來聚類我的觀點.
I am currently working on a map visualization with the Leaflet library. I am also using the markercluster plugin to cluster my points.
所以我現在的問題如下:
So my question now is the following:
我在 3 個不同的層中有 3 個不同類別的標記.例如餐廳、咖啡館和酒吧層.我想將所有活動層組合到一個特定的集群.
I have 3 different categories of Markers in 3 different layers. For example Restaurants, Cafes and Bars Layers. And I want to combine all active Layers to a specific cluster.
目前這些條目是單獨聚集的，但我想將它們聚集在一起.
At the moment the entries are clustered separately but I want to cluster them together.
下一步是根據 childMarkers 為集群著色.例如.集群包括餐廳和酒吧標記 => 半紅/半綠，僅餐廳 => 僅紅色等.
The next step would be coloring the cluster according to the childMarkers. E.g. cluster includes restaurant and bar markers => half red/ half green, only restaurants => only red etc.
我希望有人可以幫助我找到解決方案.謝謝！
I hope somebody can help me to get to a solution. Thank you!
推薦答案
您在問題中提到了 2 個不同的請求:
You mention 2 different requests in your question:
- 有 3 種不同類型的標記，但都應該聚集在一起.棘手的部分是如果您想隱藏/顯示特定類型(可能通過圖層控制).
- 根據每種類型包含的標記數自定義集群外觀.
至于第 1 點，你顯然可以將所有 3 種類型的標記添加到同一個 MarkerClusterGroup 中，這樣它們就可以聚集在一起.如果您已經將它們放在不同的圖層組中，您可以簡單地執行 myMCG.addLayers([layerGroup1, layerGroup2, layerGroup3]); 并且 MCG 將添加所有單獨的標記.但是以后不要在地圖中添加/刪除這些圖層組！
As for point 1, you can obviously add all 3 types of markers to the same MarkerClusterGroup, so that they can cluster together. If you already have them within different LayerGroups, you can simply do myMCG.addLayers([layerGroup1, layerGroup2, layerGroup3]); and MCG will get all individual markers added. But refrain from adding/removing those LayerGroups to/from the map later!
困難的部分是當您希望能夠從地圖中動態添加/刪除特定類型的標記時.除了map.removeLayer(layerGroupX);，您還需要遍歷所有單獨的標記并將它們從您的MCG中移除，例如:
The difficult part is when you want to be able nevertheless to dynamically add / remove a specific type of markers from the map. Instead of doing just map.removeLayer(layerGroupX);, you would need to loop through all individual markers and remove them from your MCG, for example:
layerGroupX.eachLayer(function (marker) {
myMCG.removeLayer(marker);
});
另請參閱 MarkerClusterGroup 插件網站上的 此問題原因和一些額外的例子.反過來將標記添加回您的 MCG.
See also this issue on MarkerClusterGroup plugin site for the reasons and some extra examples. Do the reverse for adding markers back into your MCG.
我已經發布了一個Leaflet.FeatureGroup.SubGroup 插件，它解決了這個確切的用例.另請參閱使用多個標記集群組顯示重疊集群
I have published a Leaflet.FeatureGroup.SubGroup plugin since then, which addresses this exact use case. See also Using several Marker Cluster Groups displays overlapping Clusters
至于第2點，簡單參考自定義插件文檔的集群標記部分.基本上，您在初始化 MCG 時使用選項 iconCreateFunction.您傳入一個函數，該函數采用單個參數(例如 cluster)，您可以使用 cluster.getAllChildMarkers(); 來獲取集群中包含的標記數組風格.然后簡單地遍歷這個數組來計算每種標記的數量，并相應地創建一個圖標.
As for point 2, simply refer to the Customising the Clustered Markers section of the plugin documentation. Basically, you use option iconCreateFunction when initializing your MCG. You pass in a function, which takes a single argument (e.g. cluster) and you can use cluster.getAllChildMarkers(); to get the array of contained markers in the cluster being styled. Then simply iterate through this array to count the number of each type of markers, and create an icon accordingly.
你也可以試試這個其他插件:q-cluster.但是它沒有動畫，所以它遠不如 MCG 好看……
You could also try this other plugin: q-cluster. But it does not animate, so it is far less eye-candy than MCG…
這篇關于使用markercluster對多個圖層進行聚類的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！