Snippet revisions — Bitbucket

+;

+(function(window, undefined) {

+    function _getCommonBounds(bounds) {

+        return bounds.reduce(function(prev, cur) {

+            return [Math.min(prev[0], cur[0]), Math.min(prev[1], cur[1]), Math.max(prev[2], cur[2]), Math.max(prev[3], cur[3])]

+        }, [Infinity, Infinity, -Infinity, -Infinity]);

+    }

+    function _getGeometryBounds(coords, type) {

+        switch (type) {

+            case "Point":

+                return [coords[0], coords[1], coords[0], coords[1]];

+            case "LineString":

+            case "MultiPoint":

+                return coords.reduce(function(prev, cur) {

+                    return [Math.min(prev[0], cur[0]), Math.min(prev[1], cur[1]), Math.max(prev[2], cur[0]), Math.max(prev[3], cur[1])]

+                }, [Infinity, Infinity, -Infinity, -Infinity]);

+            case "Polygon":

+            case "MultiLineString":

+                return _getCommonBounds(coords.map(function(lineString) {

+                    return _getGeometryBounds(lineString, "LineString");

+                }));

+            case "MultiPolygon":

+                return _getCommonBounds(coords.map(function(polygon) {

+                    return _getGeometryBounds(polygon, "Polygon");

+                }));

+        }

+    }

+    function getGeometryBounds(geometry) {

+        if (geometry.bbox) return geometry.bbox;

+        if (geometry.type === "GeometryCollection")

+            return _getCommonBounds(geometry.geometries.map(getGeometryBounds));

+        return _getGeometryBounds(geometry.coordinates, geometry.type)

+    }

+    function getFeatureBounds(feature) {

+        return getGeometryBounds(feature.geometry);

+    }

+    function getBounds(obj) {

+        if (obj.bbox) return obj.bbox;

+        if (obj.coordinates || obj.geometries) return getGeometryBounds(obj);

+        if (obj.type === "Feature") return getFeatureBounds(obj);

+        if (obj.type === "FeatureCollection") return _getCommonBounds(obj.features.map(getFeatureBounds));

+    }

+    var GeoJSONUtils = function() {}

+    GeoJSONUtils.prototype = {

+        getBounds: getBounds,

+        getCommonBounds: _getCommonBounds

+    };

+    window.gjutils = new GeoJSONUtils();

+})(window);

Snippets