--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/javascript/d3/src/geo/bounds.js	Thu Apr 10 14:20:23 2014 +0200
@@ -0,0 +1,76 @@
+/**
+ * Given a GeoJSON object, returns the corresponding bounding box. The bounding
+ * box is represented by a two-dimensional array: [[left, bottom], [right,
+ * top]], where left is the minimum longitude, bottom is the minimum latitude,
+ * right is maximum longitude, and top is the maximum latitude.
+ */
+d3.geo.bounds = function(feature) {
+  var left = Infinity,
+      bottom = Infinity,
+      right = -Infinity,
+      top = -Infinity;
+  d3_geo_bounds(feature, function(x, y) {
+    if (x < left) left = x;
+    if (x > right) right = x;
+    if (y < bottom) bottom = y;
+    if (y > top) top = y;
+  });
+  return [[left, bottom], [right, top]];
+};
+
+function d3_geo_bounds(o, f) {
+  if (o.type in d3_geo_boundsTypes) d3_geo_boundsTypes[o.type](o, f);
+}
+
+var d3_geo_boundsTypes = {
+  Feature: d3_geo_boundsFeature,
+  FeatureCollection: d3_geo_boundsFeatureCollection,
+  LineString: d3_geo_boundsLineString,
+  MultiLineString: d3_geo_boundsMultiLineString,
+  MultiPoint: d3_geo_boundsLineString,
+  MultiPolygon: d3_geo_boundsMultiPolygon,
+  Point: d3_geo_boundsPoint,
+  Polygon: d3_geo_boundsPolygon
+};
+
+function d3_geo_boundsFeature(o, f) {
+  d3_geo_bounds(o.geometry, f);
+}
+
+function d3_geo_boundsFeatureCollection(o, f) {
+  for (var a = o.features, i = 0, n = a.length; i < n; i++) {
+    d3_geo_bounds(a[i].geometry, f);
+  }
+}
+
+function d3_geo_boundsLineString(o, f) {
+  for (var a = o.coordinates, i = 0, n = a.length; i < n; i++) {
+    f.apply(null, a[i]);
+  }
+}
+
+function d3_geo_boundsMultiLineString(o, f) {
+  for (var a = o.coordinates, i = 0, n = a.length; i < n; i++) {
+    for (var b = a[i], j = 0, m = b.length; j < m; j++) {
+      f.apply(null, b[j]);
+    }
+  }
+}
+
+function d3_geo_boundsMultiPolygon(o, f) {
+  for (var a = o.coordinates, i = 0, n = a.length; i < n; i++) {
+    for (var b = a[i][0], j = 0, m = b.length; j < m; j++) {
+      f.apply(null, b[j]);
+    }
+  }
+}
+
+function d3_geo_boundsPoint(o, f) {
+  f.apply(null, o.coordinates);
+}
+
+function d3_geo_boundsPolygon(o, f) {
+  for (var a = o.coordinates[0], i = 0, n = a.length; i < n; i++) {
+    f.apply(null, a[i]);
+  }
+}