source: binary-improvements/webserver_legacy/js/leaflet.layer.landclaims.js@ 501

function GetLandClaimsLayer (map, mapinfo) {
        var landClaimsGroup = L.layerGroup();
        var landClaimsClusterGroup = L.markerClusterGroup({
                disableClusteringAtZoom: mapinfo.maxzoom,
                singleMarkerMode: true,
                maxClusterRadius: 50
        });
        var landClaimsRectGroup = L.layerGroup();
        landClaimsGroup.addLayer(landClaimsClusterGroup);
        landClaimsGroup.addLayer(landClaimsRectGroup);
        var maxZoomForCluster = -1;


        var setLandClaims = function(data) {
                landClaimsClusterGroup.clearLayers();
                landClaimsRectGroup.clearLayers();
        
                var claimPower = Math.floor(Math.log(data.claimsize) / Math.LN2);
                var maxClusterZoomUnlimited = mapinfo.maxzoom - (claimPower - 3);
                var maxClusterZoomLimitedMax = Math.min(maxClusterZoomUnlimited, mapinfo.maxzoom+1);
                maxZoomForCluster = Math.max(maxClusterZoomLimitedMax, 0);
        
                checkClaimClustering({target: map});

                var sizeHalf = Math.floor(data.claimsize / 2);

                $.each( data.claimowners, function( key, val ) {
                        var steamid = val.steamid;
                        var active = val.claimactive;
                        var color = active ? "#55ff55" : "#ff0000";
                        if (val.playername) {
                                var name = val.playername;
                        } else {
                                var name = "<unknown>"
                        }
                
                        $.each( val.claims, function( key, val ) {
                                var pos = L.latLng(val.x, val.z);
                                var bounds = L.latLngBounds(L.latLng(val.x - sizeHalf, val.z - sizeHalf), L.latLng(val.x + sizeHalf, val.z + sizeHalf));
                                var r = L.rectangle(bounds, {color: color, weight: 1, opacity: 0.8, fillOpacity: 0.15});
                                var m = L.marker(pos, { clickable: false, keyboard: false, zIndexOffset:-1000, iconSize: [0,0], icon: L.divIcon({className: 'invisIcon', iconSize:[0,0]}) });
                                r.bindPopup("Owner: " + name + " ("+steamid+")<br/>Position: " + val.x + " " + val.y + " " + val.z);
                                landClaimsRectGroup.addLayer(r);
                                landClaimsClusterGroup.addLayer(m);
                        });
                });
        }

        var updateClaimsEvent = function() {
                $.getJSON( "../api/getlandclaims")
                .done(setLandClaims)
                .fail(function(jqxhr, textStatus, error) {
                        console.log("Error fetching land claim list");
                })
        }


        var checkClaimClustering = function(e) {
                if (e.target._zoom >= maxZoomForCluster) {
                        landClaimsGroup.removeLayer(landClaimsClusterGroup);    
                } else {
                        landClaimsGroup.addLayer(landClaimsClusterGroup);       
                }
        };

        map.on('zoomend', checkClaimClustering);
        
        map.on('overlayadd', function(e) {
                if (e.layer == landClaimsGroup) {
                        updateClaimsEvent();
                }
        });

        return landClaimsGroup;
}