diff --git a/src/ol/format/featureformat.js b/src/ol/format/featureformat.js
index 0243780755..364ba16a86 100644
--- a/src/ol/format/featureformat.js
+++ b/src/ol/format/featureformat.js
@@ -1,6 +1,7 @@
 goog.provide('ol.format.Feature');
 
-goog.require('goog.functions');
+goog.require('goog.array');
+goog.require('ol.geom.Geometry');
 goog.require('ol.proj');
 
 
@@ -150,25 +151,33 @@ ol.format.Feature.prototype.writeGeometry = goog.abstractMethod;
 
 
 /**
- * @param {ol.geom.Geometry} geometry Geometry.
+ * @param {ol.geom.Geometry|ol.Extent} geometry Geometry.
  * @param {boolean} write Set to true for writing, false for reading.
- * @param {boolean} clone The geometry will be cloned before transforming.
  * @param {(olx.format.WriteOptions|olx.format.ReadOptions)=} opt_options
  *     Options.
- * @return {ol.geom.Geometry} Transformed geometry.
+ * @return {ol.geom.Geometry|ol.Extent} Transformed geometry.
  * @protected
  */
 ol.format.Feature.transformWithOptions = function(
-    geometry, write, clone, opt_options) {
+    geometry, write, opt_options) {
   var featureProjection = goog.isDef(opt_options) ?
       ol.proj.get(opt_options.featureProjection) : null;
   var dataProjection = goog.isDef(opt_options) ?
       ol.proj.get(opt_options.dataProjection) : null;
   if (!goog.isNull(featureProjection) && !goog.isNull(dataProjection) &&
       !ol.proj.equivalent(featureProjection, dataProjection)) {
-    return (clone ? geometry.clone() : geometry).transform(
-        write ? featureProjection : dataProjection,
-        write ? dataProjection : featureProjection);
+    if (geometry instanceof ol.geom.Geometry) {
+      return (write ? geometry.clone() : geometry).transform(
+          write ? featureProjection : dataProjection,
+          write ? dataProjection : featureProjection);
+    } else {
+      // FIXME this is necessary because ol.format.GML treats extents
+      // as geometries
+      return ol.proj.transformExtent(
+          write ? goog.array.clone(geometry) : geometry,
+          write ? featureProjection : dataProjection,
+          write ? dataProjection : featureProjection);
+    }
   } else {
     return geometry;
   }
diff --git a/src/ol/format/geojsonformat.js b/src/ol/format/geojsonformat.js
index 3c34782ee9..17c4f4a9c6 100644
--- a/src/ol/format/geojsonformat.js
+++ b/src/ol/format/geojsonformat.js
@@ -75,8 +75,9 @@ ol.format.GeoJSON.readGeometry_ = function(object, opt_options) {
   }
   var geometryReader = ol.format.GeoJSON.GEOMETRY_READERS_[object.type];
   goog.asserts.assert(goog.isDef(geometryReader));
-  return ol.format.Feature.transformWithOptions(
-      geometryReader(object), false, false, opt_options);
+  return /** @type {ol.geom.Geometry} */ (
+      ol.format.Feature.transformWithOptions(
+          geometryReader(object), false, opt_options));
 };
 
 
@@ -176,9 +177,8 @@ ol.format.GeoJSON.readPolygonGeometry_ = function(object) {
 ol.format.GeoJSON.writeGeometry_ = function(geometry, opt_options) {
   var geometryWriter = ol.format.GeoJSON.GEOMETRY_WRITERS_[geometry.getType()];
   goog.asserts.assert(goog.isDef(geometryWriter));
-  return geometryWriter(
-      ol.format.Feature.transformWithOptions(
-          geometry, true, true, opt_options));
+  return geometryWriter(/** @type {ol.geom.Geometry} */ (
+      ol.format.Feature.transformWithOptions(geometry, true, opt_options)));
 };
 
 
diff --git a/src/ol/format/gmlformat.js b/src/ol/format/gmlformat.js
index c771cb7d6c..3e2cdada0b 100644
--- a/src/ol/format/gmlformat.js
+++ b/src/ol/format/gmlformat.js
@@ -1,3 +1,6 @@
+// FIXME Envelopes should not be treated as geometries! readEnvelope_ is part
+// of GEOMETRY_PARSERS_ and methods using GEOMETRY_PARSERS_ do not expect
+// envelopes/extents, only geometries!
 goog.provide('ol.format.GML');
 
 goog.require('goog.asserts');
@@ -162,8 +165,8 @@ ol.format.GML.readGeometry = function(node, objectStack) {
   var geometry = ol.xml.pushParseAndPop(/** @type {ol.geom.Geometry} */(null),
       ol.format.GML.GEOMETRY_PARSERS_, node, objectStack);
   if (goog.isDefAndNotNull(geometry)) {
-    return ol.format.Feature.transformWithOptions(
-        geometry, false, false, context);
+    return /** @type {ol.geom.Geometry} */ (
+        ol.format.Feature.transformWithOptions(geometry, false, context));
   } else {
     return undefined;
   }
@@ -1469,7 +1472,7 @@ ol.format.GML.writeGeometry = function(node, geometry, objectStack) {
   } else {
     goog.asserts.assertInstanceof(geometry, ol.geom.Geometry);
     value =
-        ol.format.Feature.transformWithOptions(geometry, true, true, context);
+        ol.format.Feature.transformWithOptions(geometry, true, context);
   }
   ol.xml.pushSerializeAndPop(/** @type {ol.xml.NodeStackItem} */
       (item), ol.format.GML.GEOMETRY_SERIALIZERS_,
diff --git a/src/ol/format/gpxformat.js b/src/ol/format/gpxformat.js
index 707c11778f..3fcae43c0a 100644
--- a/src/ol/format/gpxformat.js
+++ b/src/ol/format/gpxformat.js
@@ -5,6 +5,7 @@ goog.require('goog.asserts');
 goog.require('goog.dom.NodeType');
 goog.require('goog.object');
 goog.require('ol.Feature');
+goog.require('ol.format.Feature');
 goog.require('ol.format.XMLFeature');
 goog.require('ol.format.XSD');
 goog.require('ol.geom.LineString');
@@ -180,6 +181,7 @@ ol.format.GPX.parseTrkSeg_ = function(node, objectStack) {
 ol.format.GPX.readRte_ = function(node, objectStack) {
   goog.asserts.assert(node.nodeType == goog.dom.NodeType.ELEMENT);
   goog.asserts.assert(node.localName == 'rte');
+  var options = /** @type {olx.format.ReadOptions} */ (objectStack[0]);
   var values = ol.xml.pushParseAndPop({
     'flatCoordinates': []
   }, ol.format.GPX.RTE_PARSERS_, node, objectStack);
@@ -191,6 +193,7 @@ ol.format.GPX.readRte_ = function(node, objectStack) {
   goog.object.remove(values, 'flatCoordinates');
   var geometry = new ol.geom.LineString(null);
   geometry.setFlatCoordinates(ol.geom.GeometryLayout.XYZM, flatCoordinates);
+  ol.format.Feature.transformWithOptions(geometry, false, options);
   var feature = new ol.Feature(geometry);
   feature.setProperties(values);
   return feature;
@@ -206,6 +209,7 @@ ol.format.GPX.readRte_ = function(node, objectStack) {
 ol.format.GPX.readTrk_ = function(node, objectStack) {
   goog.asserts.assert(node.nodeType == goog.dom.NodeType.ELEMENT);
   goog.asserts.assert(node.localName == 'trk');
+  var options = /** @type {olx.format.ReadOptions} */ (objectStack[0]);
   var values = ol.xml.pushParseAndPop({
     'flatCoordinates': [],
     'ends': []
@@ -221,6 +225,7 @@ ol.format.GPX.readTrk_ = function(node, objectStack) {
   var geometry = new ol.geom.MultiLineString(null);
   geometry.setFlatCoordinates(
       ol.geom.GeometryLayout.XYZM, flatCoordinates, ends);
+  ol.format.Feature.transformWithOptions(geometry, false, options);
   var feature = new ol.Feature(geometry);
   feature.setProperties(values);
   return feature;
@@ -236,6 +241,7 @@ ol.format.GPX.readTrk_ = function(node, objectStack) {
 ol.format.GPX.readWpt_ = function(node, objectStack) {
   goog.asserts.assert(node.nodeType == goog.dom.NodeType.ELEMENT);
   goog.asserts.assert(node.localName == 'wpt');
+  var options = /** @type {olx.format.ReadOptions} */ (objectStack[0]);
   var values = ol.xml.pushParseAndPop(
       {}, ol.format.GPX.WPT_PARSERS_, node, objectStack);
   if (!goog.isDef(values)) {
@@ -244,6 +250,7 @@ ol.format.GPX.readWpt_ = function(node, objectStack) {
   var coordinates = ol.format.GPX.appendCoordinate_([], node, values);
   var geometry = new ol.geom.Point(
       coordinates, ol.geom.GeometryLayout.XYZM);
+  ol.format.Feature.transformWithOptions(geometry, false, options);
   var feature = new ol.Feature(geometry);
   feature.setProperties(values);
   return feature;
@@ -439,13 +446,11 @@ ol.format.GPX.prototype.readFeatureFromNode = function(node, opt_options) {
   if (!goog.isDef(featureReader)) {
     return null;
   }
-  var feature = featureReader(node, []);
+  var feature = featureReader(node, [this.getReadOptions(node, opt_options)]);
   if (!goog.isDef(feature)) {
     return null;
   }
   this.handleReadExtensions_([feature]);
-  ol.format.XMLFeature.transformFeaturesWithOptions(
-      [feature], false, this.getReadOptions(node, opt_options));
   return feature;
 };
 
@@ -473,11 +478,9 @@ ol.format.GPX.prototype.readFeaturesFromNode = function(node, opt_options) {
   if (node.localName == 'gpx') {
     var features = ol.xml.pushParseAndPop(
         /** @type {Array.<ol.Feature>} */ ([]), ol.format.GPX.GPX_PARSERS_,
-        node, []);
+        node, [this.getReadOptions(node, opt_options)]);
     if (goog.isDef(features)) {
       this.handleReadExtensions_(features);
-      ol.format.XMLFeature.transformFeaturesWithOptions(
-          features, false, this.getReadOptions(node, opt_options));
       return features;
     } else {
       return [];
@@ -585,11 +588,14 @@ ol.format.GPX.writeWptType_ = function(node, coordinate, objectStack) {
  * @private
  */
 ol.format.GPX.writeRte_ = function(node, feature, objectStack) {
+  var options = /** @type {olx.format.WriteOptions} */ (objectStack[0]);
   var properties = feature.getProperties();
   var context = {node: node, 'properties': properties};
   var geometry = feature.getGeometry();
   if (goog.isDef(geometry)) {
     goog.asserts.assertInstanceof(geometry, ol.geom.LineString);
+    geometry = /** @type {ol.geom.LineString} */
+        (ol.format.Feature.transformWithOptions(geometry, true, options));
     goog.object.set(context, 'geometryLayout', geometry.getLayout());
     goog.object.set(properties, 'rtept', geometry.getCoordinates());
   }
@@ -609,11 +615,14 @@ ol.format.GPX.writeRte_ = function(node, feature, objectStack) {
  * @private
  */
 ol.format.GPX.writeTrk_ = function(node, feature, objectStack) {
+  var options = /** @type {olx.format.WriteOptions} */ (objectStack[0]);
   var properties = feature.getProperties();
   var context = {node: node, 'properties': properties};
   var geometry = feature.getGeometry();
   if (goog.isDef(geometry)) {
     goog.asserts.assertInstanceof(geometry, ol.geom.MultiLineString);
+    geometry = /** @type {ol.geom.MultiLineString} */
+        (ol.format.Feature.transformWithOptions(geometry, true, options));
     goog.object.set(properties, 'trkseg', geometry.getLineStrings());
   }
   var parentNode = objectStack[objectStack.length - 1].node;
@@ -647,12 +656,15 @@ ol.format.GPX.writeTrkSeg_ = function(node, lineString, objectStack) {
  * @private
  */
 ol.format.GPX.writeWpt_ = function(node, feature, objectStack) {
+  var options = /** @type {olx.format.WriteOptions} */ (objectStack[0]);
   var context = objectStack[objectStack.length - 1];
   goog.asserts.assert(goog.isObject(context));
   goog.object.set(context, 'properties', feature.getProperties());
   var geometry = feature.getGeometry();
   if (goog.isDef(geometry)) {
     goog.asserts.assertInstanceof(geometry, ol.geom.Point);
+    geometry = /** @type {ol.geom.Point} */
+        (ol.format.Feature.transformWithOptions(geometry, true, options));
     goog.object.set(context, 'geometryLayout', geometry.getLayout());
     ol.format.GPX.writeWptType_(node, geometry.getCoordinates(), objectStack);
   }
@@ -870,11 +882,8 @@ ol.format.GPX.prototype.writeFeaturesNode = function(features, opt_options) {
   //FIXME Serialize metadata
   var gpx = ol.xml.createElementNS('http://www.topografix.com/GPX/1/1', 'gpx');
 
-  features = ol.format.XMLFeature.transformFeaturesWithOptions(
-      features, true, opt_options);
-
   ol.xml.pushSerializeAndPop(/** @type {ol.xml.NodeStackItem} */
       ({node: gpx}), ol.format.GPX.GPX_SERIALIZERS_,
-      ol.format.GPX.GPX_NODE_FACTORY_, features, []);
+      ol.format.GPX.GPX_NODE_FACTORY_, features, [opt_options]);
   return gpx;
 };
diff --git a/src/ol/format/igcformat.js b/src/ol/format/igcformat.js
index d1347e9e39..841e608fa0 100644
--- a/src/ol/format/igcformat.js
+++ b/src/ol/format/igcformat.js
@@ -175,7 +175,7 @@ ol.format.IGC.prototype.readFeatureFromText = function(text, opt_options) {
       ol.geom.GeometryLayout.XYM : ol.geom.GeometryLayout.XYZM;
   lineString.setFlatCoordinates(layout, flatCoordinates);
   var feature = new ol.Feature(ol.format.Feature.transformWithOptions(
-      lineString, false, false, opt_options));
+      lineString, false, opt_options));
   feature.setProperties(properties);
   return feature;
 };
diff --git a/src/ol/format/kmlformat.js b/src/ol/format/kmlformat.js
index fa4d28948a..85e369f011 100644
--- a/src/ol/format/kmlformat.js
+++ b/src/ol/format/kmlformat.js
@@ -16,6 +16,7 @@ goog.require('ol.Feature');
 goog.require('ol.array');
 goog.require('ol.color');
 goog.require('ol.feature');
+goog.require('ol.format.Feature');
 goog.require('ol.format.XMLFeature');
 goog.require('ol.format.XSD');
 goog.require('ol.geom.Geometry');
@@ -1431,6 +1432,10 @@ ol.format.KML.prototype.readPlacemark_ = function(node, objectStack) {
   if (!goog.isNull(id)) {
     feature.setId(id);
   }
+  var options = /** @type {olx.format.ReadOptions} */ (objectStack[0]);
+  if (goog.isDefAndNotNull(object.geometry)) {
+    ol.format.Feature.transformWithOptions(object.geometry, false, options);
+  }
   feature.setProperties(object);
   feature.setStyle(this.featureStyleFunction_);
   return feature;
@@ -1508,10 +1513,9 @@ ol.format.KML.prototype.readFeatureFromNode = function(node, opt_options) {
     return null;
   }
   goog.asserts.assert(node.localName == 'Placemark');
-  var feature = this.readPlacemark_(node, []);
+  var feature = this.readPlacemark_(
+      node, [this.getReadOptions(node, opt_options)]);
   if (goog.isDef(feature)) {
-    ol.format.XMLFeature.transformFeaturesWithOptions(
-        [feature], false, this.getReadOptions(node, opt_options));
     return feature;
   } else {
     return null;
@@ -1542,19 +1546,17 @@ ol.format.KML.prototype.readFeaturesFromNode = function(node, opt_options) {
   var features;
   var localName = ol.xml.getLocalName(node);
   if (localName == 'Document' || localName == 'Folder') {
-    features = this.readDocumentOrFolder_(node, []);
+    features = this.readDocumentOrFolder_(
+        node, [this.getReadOptions(node, opt_options)]);
     if (goog.isDef(features)) {
-      ol.format.XMLFeature.transformFeaturesWithOptions(
-          features, false, this.getReadOptions(node, opt_options));
       return features;
     } else {
       return [];
     }
   } else if (localName == 'Placemark') {
-    var feature = this.readPlacemark_(node, []);
+    var feature = this.readPlacemark_(
+        node, [this.getReadOptions(node, opt_options)]);
     if (goog.isDef(feature)) {
-      ol.format.XMLFeature.transformFeaturesWithOptions(
-          [feature], false, this.getReadOptions(node, opt_options));
       return [feature];
     } else {
       return [];
@@ -1966,9 +1968,14 @@ ol.format.KML.writePlacemark_ = function(node, feature, objectStack) {
       ol.xml.OBJECT_PROPERTY_NODE_FACTORY, values, objectStack, orderedKeys);
 
   // serialize geometry
+  var options = /** @type {olx.format.WriteOptions} */ (objectStack[0]);
+  var geometry = feature.getGeometry();
+  if (goog.isDefAndNotNull(geometry)) {
+    geometry =
+        ol.format.Feature.transformWithOptions(geometry, true, options);
+  }
   ol.xml.pushSerializeAndPop(context, ol.format.KML.PLACEMARK_SERIALIZERS_,
-      ol.format.KML.GEOMETRY_NODE_FACTORY_,
-      [feature.getGeometry()], objectStack);
+      ol.format.KML.GEOMETRY_NODE_FACTORY_, [geometry], objectStack);
 };
 
 
@@ -2527,9 +2534,6 @@ ol.format.KML.prototype.writeFeaturesNode = function(features, opt_options) {
   ol.xml.setAttributeNS(kml, xmlSchemaInstanceUri, 'xsi:schemaLocation',
       ol.format.KML.SCHEMA_LOCATION_);
 
-  features = ol.format.XMLFeature.transformFeaturesWithOptions(
-      features, true, opt_options);
-
   var /** @type {ol.xml.NodeStackItem} */ context = {node: kml};
   var properties = {};
   if (features.length > 1) {
@@ -2540,6 +2544,6 @@ ol.format.KML.prototype.writeFeaturesNode = function(features, opt_options) {
   var orderedKeys = ol.format.KML.KML_SEQUENCE_[kml.namespaceURI];
   var values = ol.xml.makeSequence(properties, orderedKeys);
   ol.xml.pushSerializeAndPop(context, ol.format.KML.KML_SERIALIZERS_,
-      ol.xml.OBJECT_PROPERTY_NODE_FACTORY, values, [], orderedKeys);
+      ol.xml.OBJECT_PROPERTY_NODE_FACTORY, values, [opt_options], orderedKeys);
   return kml;
 };
diff --git a/src/ol/format/osmxmlformat.js b/src/ol/format/osmxmlformat.js
index 7831e7f32f..fb23b224a2 100644
--- a/src/ol/format/osmxmlformat.js
+++ b/src/ol/format/osmxmlformat.js
@@ -6,6 +6,7 @@ goog.require('goog.asserts');
 goog.require('goog.dom.NodeType');
 goog.require('goog.object');
 goog.require('ol.Feature');
+goog.require('ol.format.Feature');
 goog.require('ol.format.XMLFeature');
 goog.require('ol.geom.LineString');
 goog.require('ol.geom.Point');
@@ -59,6 +60,7 @@ ol.format.OSMXML.prototype.getExtensions = function() {
 ol.format.OSMXML.readNode_ = function(node, objectStack) {
   goog.asserts.assert(node.nodeType == goog.dom.NodeType.ELEMENT);
   goog.asserts.assert(node.localName == 'node');
+  var options = /** @type {olx.format.ReadOptions} */ (objectStack[0]);
   var state = /** @type {Object} */ (objectStack[objectStack.length - 1]);
   var id = node.getAttribute('id');
   var coordinates = /** @type {Array.<number>} */ ([
@@ -72,6 +74,7 @@ ol.format.OSMXML.readNode_ = function(node, objectStack) {
   }, ol.format.OSMXML.NODE_PARSERS_, node, objectStack);
   if (!goog.object.isEmpty(values.tags)) {
     var geometry = new ol.geom.Point(coordinates);
+    ol.format.Feature.transformWithOptions(geometry, false, options);
     var feature = new ol.Feature(geometry);
     feature.setId(id);
     feature.setProperties(values.tags);
@@ -88,6 +91,7 @@ ol.format.OSMXML.readNode_ = function(node, objectStack) {
 ol.format.OSMXML.readWay_ = function(node, objectStack) {
   goog.asserts.assert(node.nodeType == goog.dom.NodeType.ELEMENT);
   goog.asserts.assert(node.localName == 'way');
+  var options = /** @type {olx.format.ReadOptions} */ (objectStack[0]);
   var id = node.getAttribute('id');
   var values = ol.xml.pushParseAndPop({
     ndrefs: [],
@@ -109,6 +113,7 @@ ol.format.OSMXML.readWay_ = function(node, objectStack) {
     geometry = new ol.geom.LineString(null);
     geometry.setFlatCoordinates(ol.geom.GeometryLayout.XY, flatCoordinates);
   }
+  ol.format.Feature.transformWithOptions(geometry, false, options);
   var feature = new ol.Feature(geometry);
   feature.setId(id);
   feature.setProperties(values.tags);
@@ -206,14 +211,13 @@ ol.format.OSMXML.prototype.readFeatures;
  */
 ol.format.OSMXML.prototype.readFeaturesFromNode = function(node, opt_options) {
   goog.asserts.assert(node.nodeType == goog.dom.NodeType.ELEMENT);
+  var options = this.getReadOptions(node, opt_options);
   if (node.localName == 'osm') {
     var state = ol.xml.pushParseAndPop({
       nodes: {},
       features: []
-    }, ol.format.OSMXML.PARSERS_, node, []);
+    }, ol.format.OSMXML.PARSERS_, node, [options]);
     if (goog.isDef(state.features)) {
-      ol.format.XMLFeature.transformFeaturesWithOptions(
-          state.features, false, this.getReadOptions(node, opt_options));
       return state.features;
     }
   }
diff --git a/src/ol/format/polylineformat.js b/src/ol/format/polylineformat.js
index 0cb41b57bb..c80e423565 100644
--- a/src/ol/format/polylineformat.js
+++ b/src/ol/format/polylineformat.js
@@ -314,9 +314,10 @@ ol.format.Polyline.prototype.readGeometryFromText =
   var coordinates = ol.geom.flat.inflate.coordinates(
       flatCoordinates, 0, flatCoordinates.length, 2);
 
-  return ol.format.Feature.transformWithOptions(
-      new ol.geom.LineString(coordinates), false, false,
-      this.adaptOptionsWithDefaultDataProjection(opt_options));
+  return /** @type {ol.geom.Geometry} */ (
+      ol.format.Feature.transformWithOptions(
+          new ol.geom.LineString(coordinates), false,
+          this.adaptOptionsWithDefaultDataProjection(opt_options)));
 };
 
 
@@ -383,7 +384,7 @@ ol.format.Polyline.prototype.writeGeometryText =
   goog.asserts.assertInstanceof(geometry, ol.geom.LineString);
   geometry = /** @type {ol.geom.LineString} */
       (ol.format.Feature.transformWithOptions(
-          geometry, true, true,
+          geometry, true,
           this.adaptOptionsWithDefaultDataProjection(opt_options)));
   var flatCoordinates = geometry.getFlatCoordinates();
   var stride = geometry.getStride();
diff --git a/src/ol/format/topojsonformat.js b/src/ol/format/topojsonformat.js
index ab7bd47794..7c9e74d2a7 100644
--- a/src/ol/format/topojsonformat.js
+++ b/src/ol/format/topojsonformat.js
@@ -259,8 +259,8 @@ ol.format.TopoJSON.readFeatureFromGeometry_ = function(object, arcs,
     geometry = geometryReader(object, arcs);
   }
   var feature = new ol.Feature();
-  feature.setGeometry(ol.format.Feature.transformWithOptions(
-      geometry, false, false, opt_options));
+  feature.setGeometry(/** @type {ol.geom.Geometry} */ (
+      ol.format.Feature.transformWithOptions(geometry, false, opt_options)));
   if (goog.isDef(object.id)) {
     feature.setId(object.id);
   }
diff --git a/src/ol/format/wfsformat.js b/src/ol/format/wfsformat.js
index ca7eea37d1..d4098c2ee5 100644
--- a/src/ol/format/wfsformat.js
+++ b/src/ol/format/wfsformat.js
@@ -105,17 +105,18 @@ ol.format.WFS.prototype.readFeatures;
  * @inheritDoc
  */
 ol.format.WFS.prototype.readFeaturesFromNode = function(node, opt_options) {
-  var objectStack = [{
+  var context = {
     'featureType': this.featureType_,
     'featureNS': this.featureNS_
-  }];
+  };
+  goog.object.extend(context, this.getReadOptions(node,
+      goog.isDef(opt_options) ? opt_options : {}));
+  var objectStack = [context];
   var features = ol.xml.pushParseAndPop([],
       ol.format.GML.FEATURE_COLLECTION_PARSERS, node, objectStack);
   if (!goog.isDef(features)) {
     features = [];
   }
-  ol.format.XMLFeature.transformFeaturesWithOptions(
-      features, false, this.getReadOptions(node, opt_options));
   return features;
 };
 
diff --git a/src/ol/format/wktformat.js b/src/ol/format/wktformat.js
index d0c1f0a930..328e95537a 100644
--- a/src/ol/format/wktformat.js
+++ b/src/ol/format/wktformat.js
@@ -283,8 +283,8 @@ ol.format.WKT.prototype.readGeometry;
 ol.format.WKT.prototype.readGeometryFromText = function(text, opt_options) {
   var geometry = this.parse_(text);
   if (goog.isDef(geometry)) {
-    return ol.format.Feature.transformWithOptions(
-        geometry, false, false, opt_options);
+    return /** @type {ol.geom.Geometry} */ (
+        ol.format.Feature.transformWithOptions(geometry, false, opt_options));
   } else {
     return null;
   }
@@ -366,8 +366,8 @@ ol.format.WKT.prototype.writeGeometry;
  * @inheritDoc
  */
 ol.format.WKT.prototype.writeGeometryText = function(geometry, opt_options) {
-  return ol.format.WKT.encode_(ol.format.Feature.transformWithOptions(
-      geometry, true, true, opt_options));
+  return ol.format.WKT.encode_(/** @type {ol.geom.Geometry} */ (
+      ol.format.Feature.transformWithOptions(geometry, true, opt_options)));
 };
 
 
diff --git a/src/ol/format/xmlfeatureformat.js b/src/ol/format/xmlfeatureformat.js
index 90ecddc10f..319de0c18d 100644
--- a/src/ol/format/xmlfeatureformat.js
+++ b/src/ol/format/xmlfeatureformat.js
@@ -250,39 +250,3 @@ ol.format.XMLFeature.prototype.writeGeometry = function(geometry, opt_options) {
  * @return {Node} Node.
  */
 ol.format.XMLFeature.prototype.writeGeometryNode = goog.abstractMethod;
-
-
-/**
- * @param {Array.<ol.Feature>} features Features.
- * @param {boolean} write Set to true for writing, false for reading. For
- *     writing, the features will be cloned before transforming.
- * @param {(olx.format.WriteOptions|olx.format.ReadOptions)=} opt_options
- *     Options.
- * @protected
- * @return {Array.<ol.Feature>} Features.
- */
-ol.format.XMLFeature.transformFeaturesWithOptions = function(
-    features, write, opt_options) {
-  var featureProjection = goog.isDef(opt_options) ?
-      ol.proj.get(opt_options.featureProjection) : null;
-  var dataProjection = goog.isDef(opt_options) ?
-      ol.proj.get(opt_options.dataProjection) : null;
-
-  if (!goog.isNull(featureProjection) && !goog.isNull(dataProjection) &&
-      !ol.proj.equivalent(featureProjection, dataProjection)) {
-    if (write) {
-      features = goog.array.map(features, function(feature) {
-        return feature.clone();
-      });
-    }
-
-    goog.array.forEach(features, function(feature) {
-      var geom = feature.getGeometry();
-      if (goog.isDef(geom)) {
-        feature.setGeometry(ol.format.Feature.transformWithOptions(
-            geom, write, false, opt_options));
-      }
-    });
-  }
-  return features;
-};