support tiles in GeoJSON

Author: mevdschee

examples/clients/leaflet/geojson-tile-layer.js

@@ -58,46 +58,9 @@
         // Custom methods
         //
         _expandUrl: function(template, coords) {
-            // from: https://wiki.openstreetmap.org/wiki/Slippy_map_tilenames#Implementations
-            var tile2lon = function(x,z) {
-                return (x/Math.pow(2,z)*360-180);
-            };
-            var tile2lat = function(y,z) {
-                var n=Math.PI-2*Math.PI*y/Math.pow(2,z);
-                return (180/Math.PI*Math.atan(0.5*(Math.exp(n)-Math.exp(-n))));
-            };
-            // from: https://leafletjs.com/reference-1.5.0.html#map-methods-for-getting-map-state
-            var southWest = L.latLng(
-                tile2lat(coords.y+1, coords.z),
-                tile2lon(coords.x+1, coords.z)
-            );
-            var northEast = L.latLng(
-                tile2lat(coords.y, coords.z),
-                tile2lon(coords.x, coords.z)
-            );
-            // from: "toBBoxString()" on https://leafletjs.com/reference-1.5.0.html#latlngbounds
-            var bboxStr = [southWest.lng,southWest.lat,northEast.lng,northEast.lat].join(',');
-            coords = Object.assign(coords, {
-                lat1: southWest.lat,
-                lon1: southWest.lng,
-                lat2: northEast.lat,
-                lon2: northEast.lng,
-                bbox: bboxStr
-            });
             return L.Util.template(template, coords);
         },
 
-        _hashCode: function(str) {
-            var hash = 0, i, chr;
-            if (str.length === 0) return hash;
-            for (i = 0; i < str.length; i++) {
-                chr   = str.charCodeAt(i);
-                hash  = ((hash << 5) - hash) + chr;
-                hash |= 0; // Convert to 32bit integer
-            }
-            return hash;
-        },
-    
         _updateTiles: function() {
             this.layer.clearLayers();
             this.features = {};
@@ -114,9 +77,6 @@
                 geoData = geoData.features;
             }
             for (var i=0;i<geoData.length;i++) {
-                if (!geoData[i].id) {
-                    geoData[i].id = this._hashCode(JSON.stringify(geoData[i].geometry));
-                }
                 var id = geoData[i].id;
                 if (!this.features[id]) {
                     this.layer.addData(geoData[i]);