diff --git a/src/ol/source/formatvectorsource.js b/src/ol/source/formatvectorsource.js
index 1ceba4d297..7c94bf5fa2 100644
--- a/src/ol/source/formatvectorsource.js
+++ b/src/ol/source/formatvectorsource.js
@@ -48,12 +48,14 @@ goog.inherits(ol.source.FormatVector, ol.source.Vector);
 
 /**
  * @param {goog.Uri|string} url URL.
- * @param {function(this: T, Array.<ol.Feature>)} callback Callback.
- * @param {T} thisArg Value to use as `this` when executing `callback`.
+ * @param {function(this: T, Array.<ol.Feature>)} success Success Callback.
+ * @param {function(this: T)} error Error callback.
+ * @param {T} thisArg Value to use as `this` when executing `success` or
+ *     `error`.
  * @template T
  */
 ol.source.FormatVector.prototype.loadFeaturesFromURL =
-    function(url, callback, thisArg) {
+    function(url, success, error, thisArg) {
   var xhrIo = new goog.net.XhrIo();
   var type = this.format.getType();
   var responseType;
@@ -97,13 +99,13 @@ ol.source.FormatVector.prototype.loadFeaturesFromURL =
             goog.asserts.fail();
           }
           if (goog.isDefAndNotNull(source)) {
-            callback.call(thisArg, this.readFeatures(source));
+            success.call(thisArg, this.readFeatures(source));
           } else {
             this.setState(ol.source.State.ERROR);
             goog.asserts.fail();
           }
         } else {
-          this.setState(ol.source.State.ERROR);
+          error.call(thisArg);
         }
         goog.dispose(xhrIo);
       }, false, this);
diff --git a/src/ol/source/staticvectorsource.js b/src/ol/source/staticvectorsource.js
index ca5c5362c6..30b5e330e7 100644
--- a/src/ol/source/staticvectorsource.js
+++ b/src/ol/source/staticvectorsource.js
@@ -48,13 +48,15 @@ ol.source.StaticVector = function(options) {
   if (goog.isDef(options.url) || goog.isDef(options.urls)) {
     this.setState(ol.source.State.LOADING);
     if (goog.isDef(options.url)) {
-      this.loadFeaturesFromURL(options.url, this.onFeaturesLoaded_, this);
+      this.loadFeaturesFromURL(options.url,
+          this.onFeaturesLoadedSuccess_, this.onFeaturesLoadedError_, this);
     }
     if (goog.isDef(options.urls)) {
       var urls = options.urls;
       var i, ii;
       for (i = 0, ii = urls.length; i < ii; ++i) {
-        this.loadFeaturesFromURL(urls[i], this.onFeaturesLoaded_, this);
+        this.loadFeaturesFromURL(urls[i],
+            this.onFeaturesLoadedSuccess_, this.onFeaturesLoadedError_, this);
       }
     }
   }
@@ -63,11 +65,19 @@ ol.source.StaticVector = function(options) {
 goog.inherits(ol.source.StaticVector, ol.source.FormatVector);
 
 
+/**
+ * @private
+ */
+ol.source.StaticVector.prototype.onFeaturesLoadedError_ = function() {
+  this.setState(ol.source.State.ERROR);
+};
+
+
 /**
  * @param {Array.<ol.Feature>} features Features.
  * @private
  */
-ol.source.StaticVector.prototype.onFeaturesLoaded_ = function(features) {
+ol.source.StaticVector.prototype.onFeaturesLoadedSuccess_ = function(features) {
   this.addFeaturesInternal(features);
   this.setState(ol.source.State.READY);
 };
diff --git a/src/ol/source/tilevectorsource.js b/src/ol/source/tilevectorsource.js
index 17ec6a86b6..307c9717e8 100644
--- a/src/ol/source/tilevectorsource.js
+++ b/src/ol/source/tilevectorsource.js
@@ -185,6 +185,15 @@ ol.source.TileVector.prototype.loadFeatures =
   var tileRange = tileGrid.getTileRangeForExtentAndZ(extent, z);
   var tileCoord = [z, 0, 0];
   var x, y;
+  /**
+   * @param {string} tileKey Tile key.
+   * @param {Array.<ol.Feature>} features Features.
+   * @this {ol.source.TileVector}
+   */
+  function success(tileKey, features) {
+    tiles[tileKey] = features;
+    this.setState(ol.source.State.READY);
+  }
   for (x = tileRange.minX; x <= tileRange.maxX; ++x) {
     for (y = tileRange.minY; y <= tileRange.maxY; ++y) {
       var tileKey = this.getTileKeyZXY_(z, x, y);
@@ -196,16 +205,8 @@ ol.source.TileVector.prototype.loadFeatures =
         var url = tileUrlFunction(tileCoord, 1, projection);
         if (goog.isDef(url)) {
           tiles[tileKey] = [];
-          this.loadFeaturesFromURL(url, goog.partial(
-              /**
-               * @param {string} tileKey Tile key.
-               * @param {Array.<ol.Feature>} features Features.
-               * @this {ol.source.TileVector}
-               */
-              function(tileKey, features) {
-                tiles[tileKey] = features;
-                this.setState(ol.source.State.READY);
-              }, tileKey), this);
+          this.loadFeaturesFromURL(url, goog.partial(success, tileKey),
+              goog.nullFunction, this);
         }
       }
     }
diff --git a/src/ol/tilegrid/tilegrid.js b/src/ol/tilegrid/tilegrid.js
index d0b63a6975..a91a78fc02 100644
--- a/src/ol/tilegrid/tilegrid.js
+++ b/src/ol/tilegrid/tilegrid.js
@@ -2,6 +2,7 @@ goog.provide('ol.tilegrid.TileGrid');
 
 goog.require('goog.array');
 goog.require('goog.asserts');
+goog.require('goog.functions');
 goog.require('ol');
 goog.require('ol.Coordinate');
 goog.require('ol.TileCoord');
@@ -101,12 +102,16 @@ ol.tilegrid.TileGrid.tmpTileCoord_ = [0, 0, 0];
 
 
 /**
+ * Returns the identity function. May be overridden in subclasses.
  * @param {{extent: (ol.Extent|undefined),
  *          wrapX: (boolean|undefined)}=} opt_options Options.
  * @return {function(ol.TileCoord, ol.proj.Projection, ol.TileCoord=):
  *     ol.TileCoord} Tile coordinate transform.
  */
-ol.tilegrid.TileGrid.prototype.createTileCoordTransform = goog.abstractMethod;
+ol.tilegrid.TileGrid.prototype.createTileCoordTransform =
+    function(opt_options) {
+  return goog.functions.identity;
+};
 
 
 /**