diff --git a/src/ol/format/kmlformat.js b/src/ol/format/kmlformat.js
index e97b39e713..8681ba651e 100644
--- a/src/ol/format/kmlformat.js
+++ b/src/ol/format/kmlformat.js
@@ -777,10 +777,6 @@ ol.format.KML.readMultiGeometry_ = function(node, objectStack) {
     var layout;
     /** @type {Array.<number>} */
     var flatCoordinates;
-    /** @type {Array.<number>} */
-    var ends;
-    /** @type {Array.<Array.<number>>} */
-    var endss;
     if (type == ol.geom.GeometryType.POINT) {
       var point = geometries[0];
       goog.asserts.assertInstanceof(point, ol.geom.Point);
@@ -796,42 +792,12 @@ ol.format.KML.readMultiGeometry_ = function(node, objectStack) {
       multiPoint.setFlatCoordinates(layout, flatCoordinates);
       return multiPoint;
     } else if (type == ol.geom.GeometryType.LINE_STRING) {
-      var lineString = geometries[0];
-      goog.asserts.assertInstanceof(lineString, ol.geom.LineString);
-      layout = lineString.getLayout();
-      flatCoordinates = lineString.getFlatCoordinates();
-      ends = [flatCoordinates.length];
-      for (i = 1, ii = geometries.length; i < ii; ++i) {
-        geometry = geometries[i];
-        goog.asserts.assertInstanceof(geometry, ol.geom.LineString);
-        goog.asserts.assert(geometry.getLayout() == layout);
-        goog.array.extend(flatCoordinates, geometry.getFlatCoordinates());
-        ends.push(flatCoordinates.length);
-      }
       var multiLineString = new ol.geom.MultiLineString(null);
-      multiLineString.setFlatCoordinates(layout, flatCoordinates, ends);
+      multiLineString.setLineStrings(geometries);
       return multiLineString;
     } else if (type == ol.geom.GeometryType.POLYGON) {
-      var polygon = geometries[0];
-      goog.asserts.assertInstanceof(polygon, ol.geom.Polygon);
-      layout = polygon.getLayout();
-      flatCoordinates = polygon.getFlatCoordinates();
-      endss = [polygon.getEnds()];
-      for (i = 1, ii = geometries.length; i < ii; ++i) {
-        geometry = geometries[i];
-        goog.asserts.assertInstanceof(geometry, ol.geom.Polygon);
-        goog.asserts.assert(geometry.getLayout() == layout);
-        var offset = flatCoordinates.length;
-        ends = geometry.getEnds();
-        var j, jj;
-        for (j = 0, jj = ends.length; j < jj; ++j) {
-          ends[j] += offset;
-        }
-        goog.array.extend(flatCoordinates, geometry.getFlatCoordinates());
-        endss.push(ends);
-      }
       var multiPolygon = new ol.geom.MultiPolygon(null);
-      multiPolygon.setFlatCoordinates(layout, flatCoordinates, endss);
+      multiPolygon.setPolygons(geometries);
       return multiPolygon;
     } else if (type == ol.geom.GeometryType.GEOMETRY_COLLECTION) {
       return new ol.geom.GeometryCollection(geometries);
diff --git a/src/ol/geom/multipolygon.js b/src/ol/geom/multipolygon.js
index 21d2ce6049..b2be17ca30 100644
--- a/src/ol/geom/multipolygon.js
+++ b/src/ol/geom/multipolygon.js
@@ -1,5 +1,7 @@
 goog.provide('ol.geom.MultiPolygon');
 
+goog.require('goog.array');
+goog.require('goog.asserts');
 goog.require('ol.extent');
 goog.require('ol.geom.GeometryType');
 goog.require('ol.geom.Polygon');
@@ -258,3 +260,33 @@ ol.geom.MultiPolygon.prototype.setFlatCoordinates =
   this.endss_ = endss;
   this.dispatchChangeEvent();
 };
+
+
+/**
+ * @param {Array.<ol.geom.Polygon>} polygons Polygons.
+ * @todo stability experimental
+ */
+ol.geom.MultiPolygon.prototype.setPolygons = function(polygons) {
+  var layout = ol.geom.GeometryLayout.XY;
+  var flatCoordinates = [];
+  var endss = [];
+  var i, ii, ends;
+  for (i = 0, ii = polygons.length; i < ii; ++i) {
+    var polygon = polygons[i];
+    if (i === 0) {
+      layout = polygon.getLayout();
+    } else {
+      // FIXME better handle the case of non-matching layouts
+      goog.asserts.assert(polygon.getLayout() == layout);
+    }
+    var offset = flatCoordinates.length;
+    ends = polygon.getEnds();
+    var j, jj;
+    for (j = 0, jj = ends.length; j < jj; ++j) {
+      ends[j] += offset;
+    }
+    goog.array.extend(flatCoordinates, polygon.getFlatCoordinates());
+    endss.push(ends);
+  }
+  this.setFlatCoordinates(layout, flatCoordinates, endss);
+};