Added a marker clustering demo.

demos/css/MarkerCluster.Default.css

+.marker-cluster-small {
+	background-color: rgba(181, 226, 140, 0.6);
+	}
+.marker-cluster-small div {
+	background-color: rgba(110, 204, 57, 0.6);
+	}
+
+.marker-cluster-medium {
+	background-color: rgba(241, 211, 87, 0.6);
+	}
+.marker-cluster-medium div {
+	background-color: rgba(240, 194, 12, 0.6);
+	}
+
+.marker-cluster-large {
+	background-color: rgba(253, 156, 115, 0.6);
+	}
+.marker-cluster-large div {
+	background-color: rgba(241, 128, 23, 0.6);
+	}
+
+	/* IE 6-8 fallback colors */
+.leaflet-oldie .marker-cluster-small {
+	background-color: rgb(181, 226, 140);
+	}
+.leaflet-oldie .marker-cluster-small div {
+	background-color: rgb(110, 204, 57);
+	}
+
+.leaflet-oldie .marker-cluster-medium {
+	background-color: rgb(241, 211, 87);
+	}
+.leaflet-oldie .marker-cluster-medium div {
+	background-color: rgb(240, 194, 12);
+	}
+
+.leaflet-oldie .marker-cluster-large {
+	background-color: rgb(253, 156, 115);
+	}
+.leaflet-oldie .marker-cluster-large div {
+	background-color: rgb(241, 128, 23);
+}
+
+.marker-cluster {
+	background-clip: padding-box;
+	border-radius: 20px;
+	}
+.marker-cluster div {
+	width: 30px;
+	height: 30px;
+	margin-left: 5px;
+	margin-top: 5px;
+
+	text-align: center;
+	border-radius: 15px;
+	font: 12px "Helvetica Neue", Arial, Helvetica, sans-serif;
+	}
+.marker-cluster span {
+	line-height: 30px;
+	}
\ No newline at end of file

demos/css/MarkerCluster.css

+.leaflet-cluster-anim .leaflet-marker-icon, .leaflet-cluster-anim .leaflet-marker-shadow {
+	-webkit-transition: -webkit-transform 0.3s ease-out, opacity 0.3s ease-in;
+	-moz-transition: -moz-transform 0.3s ease-out, opacity 0.3s ease-in;
+	-o-transition: -o-transform 0.3s ease-out, opacity 0.3s ease-in;
+	transition: transform 0.3s ease-out, opacity 0.3s ease-in;
+}
+
+.leaflet-cluster-spider-leg {
+	/* stroke-dashoffset (duration and function) should match with leaflet-marker-icon transform in order to track it exactly */
+	-webkit-transition: -webkit-stroke-dashoffset 0.3s ease-out, -webkit-stroke-opacity 0.3s ease-in;
+	-moz-transition: -moz-stroke-dashoffset 0.3s ease-out, -moz-stroke-opacity 0.3s ease-in;
+	-o-transition: -o-stroke-dashoffset 0.3s ease-out, -o-stroke-opacity 0.3s ease-in;
+	transition: stroke-dashoffset 0.3s ease-out, stroke-opacity 0.3s ease-in;
+}

demos/js/leaflet.markercluster.js

+!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?t(exports):"function"==typeof define&&define.amd?define(["exports"],t):t((e.Leaflet=e.Leaflet||{},e.Leaflet.markercluster=e.Leaflet.markercluster||{}))}(this,function(e){"use strict";var t=L.MarkerClusterGroup=L.FeatureGroup.extend({options:{maxClusterRadius:80,iconCreateFunction:null,clusterPane:L.Marker.prototype.options.pane,spiderfyOnMaxZoom:!0,showCoverageOnHover:!0,zoomToBoundsOnClick:!0,singleMarkerMode:!1,disableClusteringAtZoom:null,removeOutsideVisibleBounds:!0,animate:!0,animateAddingMarkers:!1,spiderfyDistanceMultiplier:1,spiderLegPolylineOptions:{weight:1.5,color:"#222",opacity:.5},chunkedLoading:!1,chunkInterval:200,chunkDelay:50,chunkProgress:null,polygonOptions:{}},initialize:function(e){L.Util.setOptions(this,e),this.options.iconCreateFunction||(this.options.iconCreateFunction=this._defaultIconCreateFunction),this._featureGroup=L.featureGroup(),this._featureGroup.addEventParent(this),this._nonPointGroup=L.featureGroup(),this._nonPointGroup.addEventParent(this),this._inZoomAnimation=0,this._needsClustering=[],this._needsRemoving=[],this._currentShownBounds=null,this._queue=[],this._childMarkerEventHandlers={dragstart:this._childMarkerDragStart,move:this._childMarkerMoved,dragend:this._childMarkerDragEnd};var t=L.DomUtil.TRANSITION&&this.options.animate;L.extend(this,t?this._withAnimation:this._noAnimation),this._markerCluster=t?L.MarkerCluster:L.MarkerClusterNonAnimated},addLayer:function(e){if(e instanceof L.LayerGroup)return this.addLayers([e]);if(!e.getLatLng)return this._nonPointGroup.addLayer(e),this.fire("layeradd",{layer:e}),this;if(!this._map)return this._needsClustering.push(e),this.fire("layeradd",{layer:e}),this;if(this.hasLayer(e))return this;this._unspiderfy&&this._unspiderfy(),this._addLayer(e,this._maxZoom),this.fire("layeradd",{layer:e}),this._topClusterLevel._recalculateBounds(),this._refreshClustersIcons();var t=e,i=this._zoom;if(e.__parent)for(;t.__parent._zoom>=i;)t=t.__parent;return this._currentShownBounds.contains(t.getLatLng())&&(this.options.animateAddingMarkers?this._animationAddLayer(e,t):this._animationAddLayerNonAnimated(e,t)),this},removeLayer:function(e){return e instanceof L.LayerGroup?this.removeLayers([e]):e.getLatLng?this._map?e.__parent?(this._unspiderfy&&(this._unspiderfy(),this._unspiderfyLayer(e)),this._removeLayer(e,!0),this.fire("layerremove",{layer:e}),this._topClusterLevel._recalculateBounds(),this._refreshClustersIcons(),e.off(this._childMarkerEventHandlers,this),this._featureGroup.hasLayer(e)&&(this._featureGroup.removeLayer(e),e.clusterShow&&e.clusterShow()),this):this:(!this._arraySplice(this._needsClustering,e)&&this.hasLayer(e)&&this._needsRemoving.push({layer:e,latlng:e._latlng}),this.fire("layerremove",{layer:e}),this):(this._nonPointGroup.removeLayer(e),this.fire("layerremove",{layer:e}),this)},addLayers:function(e,t){if(!L.Util.isArray(e))return this.addLayer(e);var i,n=this._featureGroup,r=this._nonPointGroup,s=this.options.chunkedLoading,o=this.options.chunkInterval,a=this.options.chunkProgress,h=e.length,l=0,u=!0;if(this._map){var _=(new Date).getTime(),d=L.bind(function(){for(var c=(new Date).getTime();h>l;l++){if(s&&0===l%200){var p=(new Date).getTime()-c;if(p>o)break}if(i=e[l],i instanceof L.LayerGroup)u&&(e=e.slice(),u=!1),this._extractNonGroupLayers(i,e),h=e.length;else if(i.getLatLng){if(!this.hasLayer(i)&&(this._addLayer(i,this._maxZoom),t||this.fire("layeradd",{layer:i}),i.__parent&&2===i.__parent.getChildCount())){var f=i.__parent.getAllChildMarkers(),m=f[0]===i?f[1]:f[0];n.removeLayer(m)}}else r.addLayer(i),t||this.fire("layeradd",{layer:i})}a&&a(l,h,(new Date).getTime()-_),l===h?(this._topClusterLevel._recalculateBounds(),this._refreshClustersIcons(),this._topClusterLevel._recursivelyAddChildrenToMap(null,this._zoom,this._currentShownBounds)):setTimeout(d,this.options.chunkDelay)},this);d()}else for(var c=this._needsClustering;h>l;l++)i=e[l],i instanceof L.LayerGroup?(u&&(e=e.slice(),u=!1),this._extractNonGroupLayers(i,e),h=e.length):i.getLatLng?this.hasLayer(i)||c.push(i):r.addLayer(i);return this},removeLayers:function(e){var t,i,n=e.length,r=this._featureGroup,s=this._nonPointGroup,o=!0;if(!this._map){for(t=0;n>t;t++)i=e[t],i instanceof L.LayerGroup?(o&&(e=e.slice(),o=!1),this._extractNonGroupLayers(i,e),n=e.length):(this._arraySplice(this._needsClustering,i),s.removeLayer(i),this.hasLayer(i)&&this._needsRemoving.push({layer:i,latlng:i._latlng}),this.fire("layerremove",{layer:i}));return this}if(this._unspiderfy){this._unspiderfy();var a=e.slice(),h=n;for(t=0;h>t;t++)i=a[t],i instanceof L.LayerGroup?(this._extractNonGroupLayers(i,a),h=a.length):this._unspiderfyLayer(i)}for(t=0;n>t;t++)i=e[t],i instanceof L.LayerGroup?(o&&(e=e.slice(),o=!1),this._extractNonGroupLayers(i,e),n=e.length):i.__parent?(this._removeLayer(i,!0,!0),this.fire("layerremove",{layer:i}),r.hasLayer(i)&&(r.removeLayer(i),i.clusterShow&&i.clusterShow())):(s.removeLayer(i),this.fire("layerremove",{layer:i}));return this._topClusterLevel._recalculateBounds(),this._refreshClustersIcons(),this._topClusterLevel._recursivelyAddChildrenToMap(null,this._zoom,this._currentShownBounds),this},clearLayers:function(){return this._map||(this._needsClustering=[],this._needsRemoving=[],delete this._gridClusters,delete this._gridUnclustered),this._noanimationUnspiderfy&&this._noanimationUnspiderfy(),this._featureGroup.clearLayers(),this._nonPointGroup.clearLayers(),this.eachLayer(function(e){e.off(this._childMarkerEventHandlers,this),delete e.__parent},this),this._map&&this._generateInitialClusters(),this},getBounds:function(){var e=new L.LatLngBounds;this._topClusterLevel&&e.extend(this._topClusterLevel._bounds);for(var t=this._needsClustering.length-1;t>=0;t--)e.extend(this._needsClustering[t].getLatLng());return e.extend(this._nonPointGroup.getBounds()),e},eachLayer:function(e,t){var i,n,r,s=this._needsClustering.slice(),o=this._needsRemoving;for(this._topClusterLevel&&this._topClusterLevel.getAllChildMarkers(s),n=s.length-1;n>=0;n--){for(i=!0,r=o.length-1;r>=0;r--)if(o[r].layer===s[n]){i=!1;break}i&&e.call(t,s[n])}this._nonPointGroup.eachLayer(e,t)},getLayers:function(){var e=[];return this.eachLayer(function(t){e.push(t)}),e},getLayer:function(e){var t=null;return e=parseInt(e,10),this.eachLayer(function(i){L.stamp(i)===e&&(t=i)}),t},hasLayer:function(e){if(!e)return!1;var t,i=this._needsClustering;for(t=i.length-1;t>=0;t--)if(i[t]===e)return!0;for(i=this._needsRemoving,t=i.length-1;t>=0;t--)if(i[t].layer===e)return!1;return!(!e.__parent||e.__parent._group!==this)||this._nonPointGroup.hasLayer(e)},zoomToShowLayer:function(e,t){"function"!=typeof t&&(t=function(){});var i=function(){!e._icon&&!e.__parent._icon||this._inZoomAnimation||(this._map.off("moveend",i,this),this.off("animationend",i,this),e._icon?t():e.__parent._icon&&(this.once("spiderfied",t,this),e.__parent.spiderfy()))};e._icon&&this._map.getBounds().contains(e.getLatLng())?t():e.__parent._zoom<Math.round(this._map._zoom)?(this._map.on("moveend",i,this),this._map.panTo(e.getLatLng())):(this._map.on("moveend",i,this),this.on("animationend",i,this),e.__parent.zoomToBounds())},onAdd:function(e){this._map=e;var t,i,n;if(!isFinite(this._map.getMaxZoom()))throw"Map has no maxZoom specified";for(this._featureGroup.addTo(e),this._nonPointGroup.addTo(e),this._gridClusters||this._generateInitialClusters(),this._maxLat=e.options.crs.projection.MAX_LATITUDE,t=0,i=this._needsRemoving.length;i>t;t++)n=this._needsRemoving[t],n.newlatlng=n.layer._latlng,n.layer._latlng=n.latlng;for(t=0,i=this._needsRemoving.length;i>t;t++)n=this._needsRemoving[t],this._removeLayer(n.layer,!0),n.layer._latlng=n.newlatlng;this._needsRemoving=[],this._zoom=Math.round(this._map._zoom),this._currentShownBounds=this._getExpandedVisibleBounds(),this._map.on("zoomend",this._zoomEnd,this),this._map.on("moveend",this._moveEnd,this),this._spiderfierOnAdd&&this._spiderfierOnAdd(),this._bindEvents(),i=this._needsClustering,this._needsClustering=[],this.addLayers(i,!0)},onRemove:function(e){e.off("zoomend",this._zoomEnd,this),e.off("moveend",this._moveEnd,this),this._unbindEvents(),this._map._mapPane.className=this._map._mapPane.className.replace(" leaflet-cluster-anim",""),this._spiderfierOnRemove&&this._spiderfierOnRemove(),delete this._maxLat,this._hideCoverage(),this._featureGroup.remove(),this._nonPointGroup.remove(),this._featureGroup.clearLayers(),this._map=null},getVisibleParent:function(e){for(var t=e;t&&!t._icon;)t=t.__parent;return t||null},_arraySplice:function(e,t){for(var i=e.length-1;i>=0;i--)if(e[i]===t)return e.splice(i,1),!0},_removeFromGridUnclustered:function(e,t){for(var i=this._map,n=this._gridUnclustered,r=Math.floor(this._map.getMinZoom());t>=r&&n[t].removeObject(e,i.project(e.getLatLng(),t));t--);},_childMarkerDragStart:function(e){e.target.__dragStart=e.target._latlng},_childMarkerMoved:function(e){if(!this._ignoreMove&&!e.target.__dragStart){var t=e.target._popup&&e.target._popup.isOpen();this._moveChild(e.target,e.oldLatLng,e.latlng),t&&e.target.openPopup()}},_moveChild:function(e,t,i){e._latlng=t,this.removeLayer(e),e._latlng=i,this.addLayer(e)},_childMarkerDragEnd:function(e){var t=e.target.__dragStart;delete e.target.__dragStart,t&&this._moveChild(e.target,t,e.target._latlng)},_removeLayer:function(e,t,i){var n=this._gridClusters,r=this._gridUnclustered,s=this._featureGroup,o=this._map,a=Math.floor(this._map.getMinZoom());t&&this._removeFromGridUnclustered(e,this._maxZoom);var h,l=e.__parent,u=l._markers;for(this._arraySplice(u,e);l&&(l._childCount--,l._boundsNeedUpdate=!0,!(l._zoom<a));)t&&l._childCount<=1?(h=l._markers[0]===e?l._markers[1]:l._markers[0],n[l._zoom].removeObject(l,o.project(l._cLatLng,l._zoom)),r[l._zoom].addObject(h,o.project(h.getLatLng(),l._zoom)),this._arraySplice(l.__parent._childClusters,l),l.__parent._markers.push(h),h.__parent=l.__parent,l._icon&&(s.removeLayer(l),i||s.addLayer(h))):l._iconNeedsUpdate=!0,l=l.__parent;delete e.__parent},_isOrIsParent:function(e,t){for(;t;){if(e===t)return!0;t=t.parentNode}return!1},fire:function(e,t,i){if(t&&t.layer instanceof L.MarkerCluster){if(t.originalEvent&&this._isOrIsParent(t.layer._icon,t.originalEvent.relatedTarget))return;e="cluster"+e}L.FeatureGroup.prototype.fire.call(this,e,t,i)},listens:function(e,t){return L.FeatureGroup.prototype.listens.call(this,e,t)||L.FeatureGroup.prototype.listens.call(this,"cluster"+e,t)},_defaultIconCreateFunction:function(e){var t=e.getChildCount(),i=" marker-cluster-";return i+=10>t?"small":100>t?"medium":"large",new L.DivIcon({html:"<div><span>"+t+"</span></div>",className:"marker-cluster"+i,iconSize:new L.Point(40,40)})},_bindEvents:function(){var e=this._map,t=this.options.spiderfyOnMaxZoom,i=this.options.showCoverageOnHover,n=this.options.zoomToBoundsOnClick;(t||n)&&this.on("clusterclick",this._zoomOrSpiderfy,this),i&&(this.on("clustermouseover",this._showCoverage,this),this.on("clustermouseout",this._hideCoverage,this),e.on("zoomend",this._hideCoverage,this))},_zoomOrSpiderfy:function(e){for(var t=e.layer,i=t;1===i._childClusters.length;)i=i._childClusters[0];i._zoom===this._maxZoom&&i._childCount===t._childCount&&this.options.spiderfyOnMaxZoom?t.spiderfy():this.options.zoomToBoundsOnClick&&t.zoomToBounds(),e.originalEvent&&13===e.originalEvent.keyCode&&this._map._container.focus()},_showCoverage:function(e){var t=this._map;this._inZoomAnimation||(this._shownPolygon&&t.removeLayer(this._shownPolygon),e.layer.getChildCount()>2&&e.layer!==this._spiderfied&&(this._shownPolygon=new L.Polygon(e.layer.getConvexHull(),this.options.polygonOptions),t.addLayer(this._shownPolygon)))},_hideCoverage:function(){this._shownPolygon&&(this._map.removeLayer(this._shownPolygon),this._shownPolygon=null)},_unbindEvents:function(){var e=this.options.spiderfyOnMaxZoom,t=this.options.showCoverageOnHover,i=this.options.zoomToBoundsOnClick,n=this._map;(e||i)&&this.off("clusterclick",this._zoomOrSpiderfy,this),t&&(this.off("clustermouseover",this._showCoverage,this),this.off("clustermouseout",this._hideCoverage,this),n.off("zoomend",this._hideCoverage,this))},_zoomEnd:function(){this._map&&(this._mergeSplitClusters(),this._zoom=Math.round(this._map._zoom),this._currentShownBounds=this._getExpandedVisibleBounds())},_moveEnd:function(){if(!this._inZoomAnimation){var e=this._getExpandedVisibleBounds();this._topClusterLevel._recursivelyRemoveChildrenFromMap(this._currentShownBounds,Math.floor(this._map.getMinZoom()),this._zoom,e),this._topClusterLevel._recursivelyAddChildrenToMap(null,Math.round(this._map._zoom),e),this._currentShownBounds=e}},_generateInitialClusters:function(){var e=Math.ceil(this._map.getMaxZoom()),t=Math.floor(this._map.getMinZoom()),i=this.options.maxClusterRadius,n=i;"function"!=typeof i&&(n=function(){return i}),null!==this.options.disableClusteringAtZoom&&(e=this.options.disableClusteringAtZoom-1),this._maxZoom=e,this._gridClusters={},this._gridUnclustered={};for(var r=e;r>=t;r--)this._gridClusters[r]=new L.DistanceGrid(n(r)),this._gridUnclustered[r]=new L.DistanceGrid(n(r));this._topClusterLevel=new this._markerCluster(this,t-1)},_addLayer:function(e,t){var i,n,r=this._gridClusters,s=this._gridUnclustered,o=Math.floor(this._map.getMinZoom());for(this.options.singleMarkerMode&&this._overrideMarkerIcon(e),e.on(this._childMarkerEventHandlers,this);t>=o;t--){i=this._map.project(e.getLatLng(),t);var a=r[t].getNearObject(i);if(a)return a._addChild(e),e.__parent=a,void 0;if(a=s[t].getNearObject(i)){var h=a.__parent;h&&this._removeLayer(a,!1);var l=new this._markerCluster(this,t,a,e);r[t].addObject(l,this._map.project(l._cLatLng,t)),a.__parent=l,e.__parent=l;var u=l;for(n=t-1;n>h._zoom;n--)u=new this._markerCluster(this,n,u),r[n].addObject(u,this._map.project(a.getLatLng(),n));return h._addChild(u),this._removeFromGridUnclustered(a,t),void 0}s[t].addObject(e,i)}this._topClusterLevel._addChild(e),e.__parent=this._topClusterLevel},_refreshClustersIcons:function(){this._featureGroup.eachLayer(function(e){e instanceof L.MarkerCluster&&e._iconNeedsUpdate&&e._updateIcon()})},_enqueue:function(e){this._queue.push(e),this._queueTimeout||(this._queueTimeout=setTimeout(L.bind(this._processQueue,this),300))},_processQueue:function(){for(var e=0;e<this._queue.length;e++)this._queue[e].call(this);this._queue.length=0,clearTimeout(this._queueTimeout),this._queueTimeout=null},_mergeSplitClusters:function(){var e=Math.round(this._map._zoom);this._processQueue(),this._zoom<e&&this._currentShownBounds.intersects(this._getExpandedVisibleBounds())?(this._animationStart(),this._topClusterLevel._recursivelyRemoveChildrenFromMap(this._currentShownBounds,Math.floor(this._map.getMinZoom()),this._zoom,this._getExpandedVisibleBounds()),this._animationZoomIn(this._zoom,e)):this._zoom>e?(this._animationStart(),this._animationZoomOut(this._zoom,e)):this._moveEnd()},_getExpandedVisibleBounds:function(){return this.options.removeOutsideVisibleBounds?L.Browser.mobile?this._checkBoundsMaxLat(this._map.getBounds()):this._checkBoundsMaxLat(this._map.getBounds().pad(1)):this._mapBoundsInfinite},_checkBoundsMaxLat:function(e){var t=this._maxLat;return void 0!==t&&(e.getNorth()>=t&&(e._northEast.lat=1/0),e.getSouth()<=-t&&(e._southWest.lat=-1/0)),e},_animationAddLayerNonAnimated:function(e,t){if(t===e)this._featureGroup.addLayer(e);else if(2===t._childCount){t._addToMap();var i=t.getAllChildMarkers();this._featureGroup.removeLayer(i[0]),this._featureGroup.removeLayer(i[1])}else t._updateIcon()},_extractNonGroupLayers:function(e,t){var i,n=e.getLayers(),r=0;for(t=t||[];r<n.length;r++)i=n[r],i instanceof L.LayerGroup?this._extractNonGroupLayers(i,t):t.push(i);return t},_overrideMarkerIcon:function(e){var t=e.options.icon=this.options.iconCreateFunction({getChildCount:function(){return 1},getAllChildMarkers:function(){return[e]}});return t}});L.MarkerClusterGroup.include({_mapBoundsInfinite:new L.LatLngBounds(new L.LatLng(-1/0,-1/0),new L.LatLng(1/0,1/0))}),L.MarkerClusterGroup.include({_noAnimation:{_animationStart:function(){},_animationZoomIn:function(e,t){this._topClusterLevel._recursivelyRemoveChildrenFromMap(this._currentShownBounds,Math.floor(this._map.getMinZoom()),e),this._topClusterLevel._recursivelyAddChildrenToMap(null,t,this._getExpandedVisibleBounds()),this.fire("animationend")},_animationZoomOut:function(e,t){this._topClusterLevel._recursivelyRemoveChildrenFromMap(this._currentShownBounds,Math.floor(this._map.getMinZoom()),e),this._topClusterLevel._recursivelyAddChildrenToMap(null,t,this._getExpandedVisibleBounds()),this.fire("animationend")},_animationAddLayer:function(e,t){this._animationAddLayerNonAnimated(e,t)}},_withAnimation:{_animationStart:function(){this._map._mapPane.className+=" leaflet-cluster-anim",this._inZoomAnimation++},_animationZoomIn:function(e,t){var i,n=this._getExpandedVisibleBounds(),r=this._featureGroup,s=Math.floor(this._map.getMinZoom());this._ignoreMove=!0,this._topClusterLevel._recursively(n,e,s,function(s){var o,a=s._latlng,h=s._markers;for(n.contains(a)||(a=null),s._isSingleParent()&&e+1===t?(r.removeLayer(s),s._recursivelyAddChildrenToMap(null,t,n)):(s.clusterHide(),s._recursivelyAddChildrenToMap(a,t,n)),i=h.length-1;i>=0;i--)o=h[i],n.contains(o._latlng)||r.removeLayer(o)}),this._forceLayout(),this._topClusterLevel._recursivelyBecomeVisible(n,t),r.eachLayer(function(e){e instanceof L.MarkerCluster||!e._icon||e.clusterShow()}),this._topClusterLevel._recursively(n,e,t,function(e){e._recursivelyRestoreChildPositions(t)}),this._ignoreMove=!1,this._enqueue(function(){this._topClusterLevel._recursively(n,e,s,function(e){r.removeLayer(e),e.clusterShow()}),this._animationEnd()})},_animationZoomOut:function(e,t){this._animationZoomOutSingle(this._topClusterLevel,e-1,t),this._topClusterLevel._recursivelyAddChildrenToMap(null,t,this._getExpandedVisibleBounds()),this._topClusterLevel._recursivelyRemoveChildrenFromMap(this._currentShownBounds,Math.floor(this._map.getMinZoom()),e,this._getExpandedVisibleBounds())},_animationAddLayer:function(e,t){var i=this,n=this._featureGroup;n.addLayer(e),t!==e&&(t._childCount>2?(t._updateIcon(),this._forceLayout(),this._animationStart(),e._setPos(this._map.latLngToLayerPoint(t.getLatLng())),e.clusterHide(),this._enqueue(function(){n.removeLayer(e),e.clusterShow(),i._animationEnd()})):(this._forceLayout(),i._animationStart(),i._animationZoomOutSingle(t,this._map.getMaxZoom(),this._zoom)))}},_animationZoomOutSingle:function(e,t,i){var n=this._getExpandedVisibleBounds(),r=Math.floor(this._map.getMinZoom());e._recursivelyAnimateChildrenInAndAddSelfToMap(n,r,t+1,i);var s=this;this._forceLayout(),e._recursivelyBecomeVisible(n,i),this._enqueue(function(){if(1===e._childCount){var o=e._markers[0];this._ignoreMove=!0,o.setLatLng(o.getLatLng()),this._ignoreMove=!1,o.clusterShow&&o.clusterShow()}else e._recursively(n,i,r,function(e){e._recursivelyRemoveChildrenFromMap(n,r,t+1)});s._animationEnd()})},_animationEnd:function(){this._map&&(this._map._mapPane.className=this._map._mapPane.className.replace(" leaflet-cluster-anim","")),this._inZoomAnimation--,this.fire("animationend")},_forceLayout:function(){L.Util.falseFn(document.body.offsetWidth)}}),L.markerClusterGroup=function(e){return new L.MarkerClusterGroup(e)};var i=L.MarkerCluster=L.Marker.extend({options:L.Icon.prototype.options,initialize:function(e,t,i,n){L.Marker.prototype.initialize.call(this,i?i._cLatLng||i.getLatLng():new L.LatLng(0,0),{icon:this,pane:e.options.clusterPane}),this._group=e,this._zoom=t,this._markers=[],this._childClusters=[],this._childCount=0,this._iconNeedsUpdate=!0,this._boundsNeedUpdate=!0,this._bounds=new L.LatLngBounds,i&&this._addChild(i),n&&this._addChild(n)},getAllChildMarkers:function(e,t){e=e||[];for(var i=this._childClusters.length-1;i>=0;i--)this._childClusters[i].getAllChildMarkers(e);for(var n=this._markers.length-1;n>=0;n--)t&&this._markers[n].__dragStart||e.push(this._markers[n]);return e},getChildCount:function(){return this._childCount},zoomToBounds:function(e){for(var t,i=this._childClusters.slice(),n=this._group._map,r=n.getBoundsZoom(this._bounds),s=this._zoom+1,o=n.getZoom();i.length>0&&r>s;){s++;var a=[];for(t=0;t<i.length;t++)a=a.concat(i[t]._childClusters);i=a}r>s?this._group._map.setView(this._latlng,s):o>=r?this._group._map.setView(this._latlng,o+1):this._group._map.fitBounds(this._bounds,e)},getBounds:function(){var e=new L.LatLngBounds;return e.extend(this._bounds),e},_updateIcon:function(){this._iconNeedsUpdate=!0,this._icon&&this.setIcon(this)},createIcon:function(){return this._iconNeedsUpdate&&(this._iconObj=this._group.options.iconCreateFunction(this),this._iconNeedsUpdate=!1),this._iconObj.createIcon()},createShadow:function(){return this._iconObj.createShadow()},_addChild:function(e,t){this._iconNeedsUpdate=!0,this._boundsNeedUpdate=!0,this._setClusterCenter(e),e instanceof L.MarkerCluster?(t||(this._childClusters.push(e),e.__parent=this),this._childCount+=e._childCount):(t||this._markers.push(e),this._childCount++),this.__parent&&this.__parent._addChild(e,!0)},_setClusterCenter:function(e){this._cLatLng||(this._cLatLng=e._cLatLng||e._latlng)},_resetBounds:function(){var e=this._bounds;e._southWest&&(e._southWest.lat=1/0,e._southWest.lng=1/0),e._northEast&&(e._northEast.lat=-1/0,e._northEast.lng=-1/0)},_recalculateBounds:function(){var e,t,i,n,r=this._markers,s=this._childClusters,o=0,a=0,h=this._childCount;if(0!==h){for(this._resetBounds(),e=0;e<r.length;e++)i=r[e]._latlng,this._bounds.extend(i),o+=i.lat,a+=i.lng;for(e=0;e<s.length;e++)t=s[e],t._boundsNeedUpdate&&t._recalculateBounds(),this._bounds.extend(t._bounds),i=t._wLatLng,n=t._childCount,o+=i.lat*n,a+=i.lng*n;this._latlng=this._wLatLng=new L.LatLng(o/h,a/h),this._boundsNeedUpdate=!1}},_addToMap:function(e){e&&(this._backupLatlng=this._latlng,this.setLatLng(e)),this._group._featureGroup.addLayer(this)},_recursivelyAnimateChildrenIn:function(e,t,i){this._recursively(e,this._group._map.getMinZoom(),i-1,function(e){var i,n,r=e._markers;for(i=r.length-1;i>=0;i--)n=r[i],n._icon&&(n._setPos(t),n.clusterHide())},function(e){var i,n,r=e._childClusters;for(i=r.length-1;i>=0;i--)n=r[i],n._icon&&(n._setPos(t),n.clusterHide())})},_recursivelyAnimateChildrenInAndAddSelfToMap:function(e,t,i,n){this._recursively(e,n,t,function(r){r._recursivelyAnimateChildrenIn(e,r._group._map.latLngToLayerPoint(r.getLatLng()).round(),i),r._isSingleParent()&&i-1===n?(r.clusterShow(),r._recursivelyRemoveChildrenFromMap(e,t,i)):r.clusterHide(),r._addToMap()})},_recursivelyBecomeVisible:function(e,t){this._recursively(e,this._group._map.getMinZoom(),t,null,function(e){e.clusterShow()})},_recursivelyAddChildrenToMap:function(e,t,i){this._recursively(i,this._group._map.getMinZoom()-1,t,function(n){if(t!==n._zoom)for(var r=n._markers.length-1;r>=0;r--){var s=n._markers[r];i.contains(s._latlng)&&(e&&(s._backupLatlng=s.getLatLng(),s.setLatLng(e),s.clusterHide&&s.clusterHide()),n._group._featureGroup.addLayer(s))}},function(t){t._addToMap(e)})},_recursivelyRestoreChildPositions:function(e){for(var t=this._markers.length-1;t>=0;t--){var i=this._markers[t];i._backupLatlng&&(i.setLatLng(i._backupLatlng),delete i._backupLatlng)}if(e-1===this._zoom)for(var n=this._childClusters.length-1;n>=0;n--)this._childClusters[n]._restorePosition();else for(var r=this._childClusters.length-1;r>=0;r--)this._childClusters[r]._recursivelyRestoreChildPositions(e)},_restorePosition:function(){this._backupLatlng&&(this.setLatLng(this._backupLatlng),delete this._backupLatlng)},_recursivelyRemoveChildrenFromMap:function(e,t,i,n){var r,s;this._recursively(e,t-1,i-1,function(e){for(s=e._markers.length-1;s>=0;s--)r=e._markers[s],n&&n.contains(r._latlng)||(e._group._featureGroup.removeLayer(r),r.clusterShow&&r.clusterShow())},function(e){for(s=e._childClusters.length-1;s>=0;s--)r=e._childClusters[s],n&&n.contains(r._latlng)||(e._group._featureGroup.removeLayer(r),r.clusterShow&&r.clusterShow())})},_recursively:function(e,t,i,n,r){var s,o,a=this._childClusters,h=this._zoom;if(h>=t&&(n&&n(this),r&&h===i&&r(this)),t>h||i>h)for(s=a.length-1;s>=0;s--)o=a[s],o._boundsNeedUpdate&&o._recalculateBounds(),e.intersects(o._bounds)&&o._recursively(e,t,i,n,r)},_isSingleParent:function(){return this._childClusters.length>0&&this._childClusters[0]._childCount===this._childCount}});L.Marker.include({clusterHide:function(){var e=this.options.opacity;return this.setOpacity(0),this.options.opacity=e,this},clusterShow:function(){return this.setOpacity(this.options.opacity)}}),L.DistanceGrid=function(e){this._cellSize=e,this._sqCellSize=e*e,this._grid={},this._objectPoint={}},L.DistanceGrid.prototype={addObject:function(e,t){var i=this._getCoord(t.x),n=this._getCoord(t.y),r=this._grid,s=r[n]=r[n]||{},o=s[i]=s[i]||[],a=L.Util.stamp(e);this._objectPoint[a]=t,o.push(e)},updateObject:function(e,t){this.removeObject(e),this.addObject(e,t)},removeObject:function(e,t){var i,n,r=this._getCoord(t.x),s=this._getCoord(t.y),o=this._grid,a=o[s]=o[s]||{},h=a[r]=a[r]||[];for(delete this._objectPoint[L.Util.stamp(e)],i=0,n=h.length;n>i;i++)if(h[i]===e)return h.splice(i,1),1===n&&delete a[r],!0},eachObject:function(e,t){var i,n,r,s,o,a,h,l=this._grid;for(i in l){o=l[i];for(n in o)for(a=o[n],r=0,s=a.length;s>r;r++)h=e.call(t,a[r]),h&&(r--,s--)}},getNearObject:function(e){var t,i,n,r,s,o,a,h,l=this._getCoord(e.x),u=this._getCoord(e.y),_=this._objectPoint,d=this._sqCellSize,c=null;for(t=u-1;u+1>=t;t++)if(r=this._grid[t])for(i=l-1;l+1>=i;i++)if(s=r[i])for(n=0,o=s.length;o>n;n++)a=s[n],h=this._sqDist(_[L.Util.stamp(a)],e),(d>h||d>=h&&null===c)&&(d=h,c=a);return c},_getCoord:function(e){var t=Math.floor(e/this._cellSize);return isFinite(t)?t:e},_sqDist:function(e,t){var i=t.x-e.x,n=t.y-e.y;return i*i+n*n}},function(){L.QuickHull={getDistant:function(e,t){var i=t[1].lat-t[0].lat,n=t[0].lng-t[1].lng;return n*(e.lat-t[0].lat)+i*(e.lng-t[0].lng)},findMostDistantPointFromBaseLine:function(e,t){var i,n,r,s=0,o=null,a=[];for(i=t.length-1;i>=0;i--)n=t[i],r=this.getDistant(n,e),r>0&&(a.push(n),r>s&&(s=r,o=n));return{maxPoint:o,newPoints:a}},buildConvexHull:function(e,t){var i=[],n=this.findMostDistantPointFromBaseLine(e,t);return n.maxPoint?(i=i.concat(this.buildConvexHull([e[0],n.maxPoint],n.newPoints)),i=i.concat(this.buildConvexHull([n.maxPoint,e[1]],n.newPoints))):[e[0]]},getConvexHull:function(e){var t,i=!1,n=!1,r=!1,s=!1,o=null,a=null,h=null,l=null,u=null,_=null;for(t=e.length-1;t>=0;t--){var d=e[t];(i===!1||d.lat>i)&&(o=d,i=d.lat),(n===!1||d.lat<n)&&(a=d,n=d.lat),(r===!1||d.lng>r)&&(h=d,r=d.lng),(s===!1||d.lng<s)&&(l=d,s=d.lng)}n!==i?(_=a,u=o):(_=l,u=h);var c=[].concat(this.buildConvexHull([_,u],e),this.buildConvexHull([u,_],e));return c}}}(),L.MarkerCluster.include({getConvexHull:function(){var e,t,i=this.getAllChildMarkers(),n=[];for(t=i.length-1;t>=0;t--)e=i[t].getLatLng(),n.push(e);return L.QuickHull.getConvexHull(n)}}),L.MarkerCluster.include({_2PI:2*Math.PI,_circleFootSeparation:25,_circleStartAngle:0,_spiralFootSeparation:28,_spiralLengthStart:11,_spiralLengthFactor:5,_circleSpiralSwitchover:9,spiderfy:function(){if(this._group._spiderfied!==this&&!this._group._inZoomAnimation){var e,t=this.getAllChildMarkers(null,!0),i=this._group,n=i._map,r=n.latLngToLayerPoint(this._latlng);this._group._unspiderfy(),this._group._spiderfied=this,t.length>=this._circleSpiralSwitchover?e=this._generatePointsSpiral(t.length,r):(r.y+=10,e=this._generatePointsCircle(t.length,r)),this._animationSpiderfy(t,e)}},unspiderfy:function(e){this._group._inZoomAnimation||(this._animationUnspiderfy(e),this._group._spiderfied=null)},_generatePointsCircle:function(e,t){var i,n,r=this._group.options.spiderfyDistanceMultiplier*this._circleFootSeparation*(2+e),s=r/this._2PI,o=this._2PI/e,a=[];for(s=Math.max(s,35),a.length=e,i=0;e>i;i++)n=this._circleStartAngle+i*o,a[i]=new L.Point(t.x+s*Math.cos(n),t.y+s*Math.sin(n))._round();return a},_generatePointsSpiral:function(e,t){var i,n=this._group.options.spiderfyDistanceMultiplier,r=n*this._spiralLengthStart,s=n*this._spiralFootSeparation,o=n*this._spiralLengthFactor*this._2PI,a=0,h=[];for(h.length=e,i=e;i>=0;i--)e>i&&(h[i]=new L.Point(t.x+r*Math.cos(a),t.y+r*Math.sin(a))._round()),a+=s/r+5e-4*i,r+=o/a;return h},_noanimationUnspiderfy:function(){var e,t,i=this._group,n=i._map,r=i._featureGroup,s=this.getAllChildMarkers(null,!0);for(i._ignoreMove=!0,this.setOpacity(1),t=s.length-1;t>=0;t--)e=s[t],r.removeLayer(e),e._preSpiderfyLatlng&&(e.setLatLng(e._preSpiderfyLatlng),delete e._preSpiderfyLatlng),e.setZIndexOffset&&e.setZIndexOffset(0),e._spiderLeg&&(n.removeLayer(e._spiderLeg),delete e._spiderLeg);i.fire("unspiderfied",{cluster:this,markers:s}),i._ignoreMove=!1,i._spiderfied=null}}),L.MarkerClusterNonAnimated=L.MarkerCluster.extend({_animationSpiderfy:function(e,t){var i,n,r,s,o=this._group,a=o._map,h=o._featureGroup,l=this._group.options.spiderLegPolylineOptions;for(o._ignoreMove=!0,i=0;i<e.length;i++)s=a.layerPointToLatLng(t[i]),n=e[i],r=new L.Polyline([this._latlng,s],l),a.addLayer(r),n._spiderLeg=r,n._preSpiderfyLatlng=n._latlng,n.setLatLng(s),n.setZIndexOffset&&n.setZIndexOffset(1e6),h.addLayer(n);this.setOpacity(.3),o._ignoreMove=!1,o.fire("spiderfied",{cluster:this,markers:e})},_animationUnspiderfy:function(){this._noanimationUnspiderfy()}}),L.MarkerCluster.include({_animationSpiderfy:function(e,t){var i,n,r,s,o,a,h=this,l=this._group,u=l._map,_=l._featureGroup,d=this._latlng,c=u.latLngToLayerPoint(d),p=L.Path.SVG,f=L.extend({},this._group.options.spiderLegPolylineOptions),m=f.opacity;for(void 0===m&&(m=L.MarkerClusterGroup.prototype.options.spiderLegPolylineOptions.opacity),p?(f.opacity=0,f.className=(f.className||"")+" leaflet-cluster-spider-leg"):f.opacity=m,l._ignoreMove=!0,i=0;i<e.length;i++)n=e[i],a=u.layerPointToLatLng(t[i]),r=new L.Polyline([d,a],f),u.addLayer(r),n._spiderLeg=r,p&&(s=r._path,o=s.getTotalLength()+.1,s.style.strokeDasharray=o,s.style.strokeDashoffset=o),n.setZIndexOffset&&n.setZIndexOffset(1e6),n.clusterHide&&n.clusterHide(),_.addLayer(n),n._setPos&&n._setPos(c);for(l._forceLayout(),l._animationStart(),i=e.length-1;i>=0;i--)a=u.layerPointToLatLng(t[i]),n=e[i],n._preSpiderfyLatlng=n._latlng,n.setLatLng(a),n.clusterShow&&n.clusterShow(),p&&(r=n._spiderLeg,s=r._path,s.style.strokeDashoffset=0,r.setStyle({opacity:m}));this.setOpacity(.3),l._ignoreMove=!1,setTimeout(function(){l._animationEnd(),l.fire("spiderfied",{cluster:h,markers:e})},200)},_animationUnspiderfy:function(e){var t,i,n,r,s,o,a=this,h=this._group,l=h._map,u=h._featureGroup,_=e?l._latLngToNewLayerPoint(this._latlng,e.zoom,e.center):l.latLngToLayerPoint(this._latlng),d=this.getAllChildMarkers(null,!0),c=L.Path.SVG;for(h._ignoreMove=!0,h._animationStart(),this.setOpacity(1),i=d.length-1;i>=0;i--)t=d[i],t._preSpiderfyLatlng&&(t.closePopup(),t.setLatLng(t._preSpiderfyLatlng),delete t._preSpiderfyLatlng,o=!0,t._setPos&&(t._setPos(_),o=!1),t.clusterHide&&(t.clusterHide(),o=!1),o&&u.removeLayer(t),c&&(n=t._spiderLeg,r=n._path,s=r.getTotalLength()+.1,r.style.strokeDashoffset=s,n.setStyle({opacity:0})));h._ignoreMove=!1,setTimeout(function(){var e=0;for(i=d.length-1;i>=0;i--)t=d[i],t._spiderLeg&&e++;for(i=d.length-1;i>=0;i--)t=d[i],t._spiderLeg&&(t.clusterShow&&t.clusterShow(),t.setZIndexOffset&&t.setZIndexOffset(0),e>1&&u.removeLayer(t),l.removeLayer(t._spiderLeg),delete t._spiderLeg);h._animationEnd(),h.fire("unspiderfied",{cluster:a,markers:d})},200)}}),L.MarkerClusterGroup.include({_spiderfied:null,unspiderfy:function(){this._unspiderfy.apply(this,arguments)},_spiderfierOnAdd:function(){this._map.on("click",this._unspiderfyWrapper,this),this._map.options.zoomAnimation&&this._map.on("zoomstart",this._unspiderfyZoomStart,this),this._map.on("zoomend",this._noanimationUnspiderfy,this),L.Browser.touch||this._map.getRenderer(this)},_spiderfierOnRemove:function(){this._map.off("click",this._unspiderfyWrapper,this),this._map.off("zoomstart",this._unspiderfyZoomStart,this),this._map.off("zoomanim",this._unspiderfyZoomAnim,this),this._map.off("zoomend",this._noanimationUnspiderfy,this),this._noanimationUnspiderfy()
+},_unspiderfyZoomStart:function(){this._map&&this._map.on("zoomanim",this._unspiderfyZoomAnim,this)},_unspiderfyZoomAnim:function(e){L.DomUtil.hasClass(this._map._mapPane,"leaflet-touching")||(this._map.off("zoomanim",this._unspiderfyZoomAnim,this),this._unspiderfy(e))},_unspiderfyWrapper:function(){this._unspiderfy()},_unspiderfy:function(e){this._spiderfied&&this._spiderfied.unspiderfy(e)},_noanimationUnspiderfy:function(){this._spiderfied&&this._spiderfied._noanimationUnspiderfy()},_unspiderfyLayer:function(e){e._spiderLeg&&(this._featureGroup.removeLayer(e),e.clusterShow&&e.clusterShow(),e.setZIndexOffset&&e.setZIndexOffset(0),this._map.removeLayer(e._spiderLeg),delete e._spiderLeg)}}),L.MarkerClusterGroup.include({refreshClusters:function(e){return e?e instanceof L.MarkerClusterGroup?e=e._topClusterLevel.getAllChildMarkers():e instanceof L.LayerGroup?e=e._layers:e instanceof L.MarkerCluster?e=e.getAllChildMarkers():e instanceof L.Marker&&(e=[e]):e=this._topClusterLevel.getAllChildMarkers(),this._flagParentsIconsNeedUpdate(e),this._refreshClustersIcons(),this.options.singleMarkerMode&&this._refreshSingleMarkerModeMarkers(e),this},_flagParentsIconsNeedUpdate:function(e){var t,i;for(t in e)for(i=e[t].__parent;i;)i._iconNeedsUpdate=!0,i=i.__parent},_refreshSingleMarkerModeMarkers:function(e){var t,i;for(t in e)i=e[t],this.hasLayer(i)&&i.setIcon(this._overrideMarkerIcon(i))}}),L.Marker.include({refreshIconOptions:function(e,t){var i=this.options.icon;return L.setOptions(i,e),this.setIcon(i),t&&this.__parent&&this.__parent._group.refreshClusters(this),this}}),e.MarkerClusterGroup=t,e.MarkerCluster=i});
+//# sourceMappingURL=leaflet.markercluster.js.map
\ No newline at end of file

demos/marker-clustering.html

+<!DOCTYPE html>
+<html>
+
+<head>
+    <meta charset=utf-8 />
+    <title>CedarMaps - Basic Map Load with a Marker</title>
+    <script src='../dist/v1.8.0/cedarmaps.uncompressed.js'></script>
+    <script src='./js/leaflet.markercluster.js'></script>
+    <script src='../access-token.js'></script>
+    <link href='../dist/v1.8.0/cedarmaps.css' rel='stylesheet' />
+    <link href='./css/MarkerCluster.css' rel='stylesheet' />
+    <link href='./css/MarkerCluster.Default.css' rel='stylesheet' />
+    <style>
+    body {
+        margin: 0;
+        padding: 0;
+    }
+
+    .map {
+        position: absolute;
+        top: 0;
+        bottom: 0;
+        width: 100%;
+    }
+    </style>
+</head>
+
+<body>
+    <div id='map' class='map'> </div>
+    <script>
+    try {
+        L.cedarmaps.accessToken = accessToken;
+    } catch (err) {
+        throw new Error('You need to get an access token to be able to use cedarmaps SDK. ' +
+            'Send us an email to <info@cedar.ir>');
+    }
+
+    /**
+     * Initilizing Map View
+     */
+
+    // Getting maps info from a tileJSON source
+    var tileJSONUrl = 'https://api.cedarmaps.com/v1/tiles/cedarmaps.streets.json?access_token=' + L.cedarmaps.accessToken;
+
+    // initilizing map into div#map
+    var map = L.cedarmaps.map('map', tileJSONUrl, {
+        scrollWheelZoom: true,
+        zoomControl: false,
+        minZoom: 7,
+        maxZoom: 17,
+        maxBounds: [
+            [25.064, 44.039],
+            [39.771, 63.322]
+        ], // Iran's bounding box
+    }).setView([35.757448286487595, 51.40876293182373], 7);
+
+    var zoomControl = new L.Control.Zoom({ position: 'topleft' });
+    zoomControl.addTo(map);
+
+    
+    // These are some random points in Iran, which we are going to make a cluster out of them. Each point has coordinates and
+    // a random popup content which is simply an incremental number. If you later click on any marker, a popup shows with that
+    // number.
+    var addressPoints = [{"lat":35.55904339525896,"lng":51.36108398437501,"popupContent":"1"},{"lat":35.62158189955968,"lng":51.55883789062501,"popupContent":"2"},{"lat":35.45172093634465,"lng":51.67968750000001,"popupContent":"3"},{"lat":35.47856499535729,"lng":51.32812500000001,"popupContent":"4"},{"lat":35.68407153314097,"lng":51.19628906250001,"popupContent":"5"},{"lat":35.69299463209881,"lng":51.427001953125,"popupContent":"6"},{"lat":35.576916524038616,"lng":51.36108398437501,"popupContent":"7"},{"lat":35.576916524038616,"lng":51.19628906250001,"popupContent":"8"},{"lat":35.63051198300061,"lng":51.22924804687501,"popupContent":"9"},{"lat":35.66622234103479,"lng":51.35009765625001,"popupContent":"10"},{"lat":35.7019167328534,"lng":51.448974609375,"popupContent":"11"},{"lat":35.71975793933433,"lng":51.54785156250001,"popupContent":"12"},{"lat":35.65729624809628,"lng":51.51489257812501,"popupContent":"13"},{"lat":35.60371874069731,"lng":51.427001953125,"popupContent":"14"},{"lat":35.65729624809628,"lng":51.30615234375001,"popupContent":"15"},{"lat":35.594785665487244,"lng":51.097412109375,"popupContent":"16"},{"lat":36.27970720524017,"lng":59.57885742187501,"popupContent":"17"},{"lat":36.20882309283712,"lng":59.76562500000001,"popupContent":"18"},{"lat":36.27085020723905,"lng":59.76562500000001,"popupContent":"19"},{"lat":36.24427318493909,"lng":59.710693359375,"popupContent":"20"},{"lat":36.1822249804225,"lng":59.69970703125,"popupContent":"21"},{"lat":36.1822249804225,"lng":59.710693359375,"popupContent":"22"},{"lat":36.30627216957992,"lng":59.73266601562501,"popupContent":"23"},{"lat":36.20882309283712,"lng":59.68872070312501,"popupContent":"24"},{"lat":36.217687122250574,"lng":59.62280273437501,"popupContent":"25"},{"lat":36.15561783381855,"lng":59.68872070312501,"popupContent":"26"},{"lat":32.602361666817515,"lng":51.64672851562501,"popupContent":"27"},{"lat":32.62087018318113,"lng":51.66870117187501,"popupContent":"28"},{"lat":32.65325087996883,"lng":51.70715332031251,"popupContent":"29"},{"lat":32.648625783736726,"lng":51.66870117187501,"popupContent":"30"},{"lat":32.704111144407406,"lng":51.61376953125001,"popupContent":"31"},{"lat":32.690243035492266,"lng":51.50390625000001,"popupContent":"32"},{"lat":32.63474905974431,"lng":51.5972900390625,"popupContent":"33"},{"lat":32.59310597426537,"lng":51.55883789062501,"popupContent":"34"},{"lat":32.588477769459146,"lng":51.712646484375,"popupContent":"35"},{"lat":32.532920675187846,"lng":51.67968750000001,"popupContent":"36"},{"lat":29.599730094380433,"lng":52.54211425781251,"popupContent":"37"},{"lat":29.585400203408376,"lng":52.54211425781251,"popupContent":"38"},{"lat":29.544787796199465,"lng":52.60253906250001,"popupContent":"39"},{"lat":29.585400203408376,"lng":52.54211425781251,"popupContent":"40"},{"lat":29.594953690210986,"lng":52.49267578125001,"popupContent":"41"},{"lat":29.573457073017593,"lng":52.5091552734375,"popupContent":"42"},{"lat":29.530450107491063,"lng":52.53936767578126,"popupContent":"43"},{"lat":29.5830116903775,"lng":52.57507324218751,"popupContent":"44"},{"lat":29.614057949691468,"lng":52.52563476562501,"popupContent":"45"},{"lat":29.573457073017593,"lng":52.50640869140626,"popupContent":"46"},{"lat":29.566290516578164,"lng":52.58056640625001,"popupContent":"47"},{"lat":29.59017705987947,"lng":52.55584716796876,"popupContent":"48"},{"lat":29.591371238663804,"lng":52.540740966796875,"popupContent":"49"},{"lat":29.56270704764342,"lng":52.53936767578126,"popupContent":"50"},{"lat":29.581817412664478,"lng":52.518768310546875,"popupContent":"51"},{"lat":29.6200272884574,"lng":52.5091552734375,"popupContent":"52"},{"lat":29.62360872200976,"lng":52.4871826171875,"popupContent":"53"},{"lat":29.602118211647333,"lng":52.49404907226563,"popupContent":"54"},{"lat":29.594953690210986,"lng":52.54348754882813,"popupContent":"55"},{"lat":29.621221113784504,"lng":52.56134033203125,"popupContent":"56"},{"lat":29.560317997724837,"lng":52.60253906250001,"popupContent":"57"}];
+
+
+    // This example makes use of a leaflet plugin. 
+    // For more information on how to use other features of this plugin, please read its docs:
+    // https://github.com/Leaflet/Leaflet.markercluster#using-the-plugin
+    
+    var markers = L.markerClusterGroup();
+
+    for (var i = 0; i < addressPoints.length; i++) {
+        var point = addressPoints[i];
+        var popupContent = point["popupContent"];
+        var marker = L.marker(new L.LatLng(point["lat"], point["lng"]), { title: popupContent });
+        marker.bindPopup(popupContent);
+        markers.addLayer(marker);
+    }
+
+    map.addLayer(markers);
+    </script>
+</body>
+
+</html>
\ No newline at end of file