diff --git a/src/ol/tilegrid.js b/src/ol/tilegrid.js
index 1dc92ec9f5..189d4b9c0a 100644
--- a/src/ol/tilegrid.js
+++ b/src/ol/tilegrid.js
@@ -124,11 +124,11 @@ ol.TileGrid.prototype.getExtent = function() {
  * @return {ol.TileBounds} Tile bounds.
  */
 ol.TileGrid.prototype.getExtentTileBounds = function(z, extent) {
-  var topRight = new goog.math.Coordinate(extent.right, extent.top);
-  var bottomLeft = new goog.math.Coordinate(extent.left, extent.bottom);
-  return ol.TileBounds.boundingTileBounds(
-      this.getTileCoord(z, topRight),
-      this.getTileCoord(z, bottomLeft));
+  var min =
+      this.getTileCoord(z, new goog.math.Coordinate(extent.minX, extent.minY));
+  var max =
+      this.getTileCoord(z, new goog.math.Coordinate(extent.maxX, extent.maxY));
+  return new ol.TileBounds(min.x, min.y, max.x, max.y);
 };
 
 
@@ -203,11 +203,11 @@ ol.TileGrid.prototype.getTileCoordExtent = function(tileCoord) {
   var origin = this.getOrigin(tileCoord.z);
   var resolution = this.getResolution(tileCoord.z);
   var tileSize = this.tileSize_;
-  var left = origin.x + tileCoord.x * tileSize.width * resolution;
-  var right = left + tileSize.width * resolution;
-  var bottom = origin.y + tileCoord.y * tileSize.height * resolution;
-  var top = bottom + tileSize.height * resolution;
-  return new ol.Extent(top, right, bottom, left);
+  var minX = origin.x + tileCoord.x * tileSize.width * resolution;
+  var minY = origin.y + tileCoord.y * tileSize.height * resolution;
+  var maxX = minX + tileSize.width * resolution;
+  var maxY = minY + tileSize.height * resolution;
+  return new ol.Extent(minX, minY, maxX, maxY);
 };
 
 
diff --git a/src/ol/tilegrid_test.js b/src/ol/tilegrid_test.js
index f5b350e6cb..68278cb614 100644
--- a/src/ol/tilegrid_test.js
+++ b/src/ol/tilegrid_test.js
@@ -15,7 +15,7 @@ var tileSize;
 
 function setUp() {
   resolutions = [1000, 500, 250, 100];
-  extent = new ol.Extent(100000, 100000, 0, 0);
+  extent = new ol.Extent(0, 0, 100000, 100000);
   origin = new goog.math.Coordinate(0, 0);
   origins = [];
   tileSize = new goog.math.Size(100, 100);
@@ -158,22 +158,22 @@ function testGetTileCoordExtent() {
   var tileCoordExtent;
 
   tileCoordExtent = tileGrid.getTileCoordExtent(new ol.TileCoord(0, 0, 0));
-  assertEquals(100000, tileCoordExtent.top);
-  assertEquals(100000, tileCoordExtent.right);
-  assertEquals(0, tileCoordExtent.bottom);
-  assertEquals(0, tileCoordExtent.left);
+  assertEquals(0, tileCoordExtent.minX);
+  assertEquals(0, tileCoordExtent.minY);
+  assertEquals(100000, tileCoordExtent.maxX);
+  assertEquals(100000, tileCoordExtent.maxY);
 
   tileCoordExtent = tileGrid.getTileCoordExtent(new ol.TileCoord(3, 9, 0));
-  assertEquals(10000, tileCoordExtent.top);
-  assertEquals(100000, tileCoordExtent.right);
-  assertEquals(0, tileCoordExtent.bottom);
-  assertEquals(90000, tileCoordExtent.left);
+  assertEquals(90000, tileCoordExtent.minX);
+  assertEquals(0, tileCoordExtent.minY);
+  assertEquals(100000, tileCoordExtent.maxX);
+  assertEquals(10000, tileCoordExtent.maxY);
 
   tileCoordExtent = tileGrid.getTileCoordExtent(new ol.TileCoord(3, 0, 9));
-  assertEquals(100000, tileCoordExtent.top);
-  assertEquals(10000, tileCoordExtent.right);
-  assertEquals(90000, tileCoordExtent.bottom);
-  assertEquals(0, tileCoordExtent.left);
+  assertEquals(0, tileCoordExtent.minX);
+  assertEquals(90000, tileCoordExtent.minY);
+  assertEquals(10000, tileCoordExtent.maxX);
+  assertEquals(100000, tileCoordExtent.maxY);
 
 }
 
@@ -181,33 +181,32 @@ function testGetTileCoordExtent() {
 function testGetExtentTileBounds() {
 
   var tileGrid = new ol.TileGrid(resolutions, extent, origin, tileSize);
-  var e = new ol.Extent(15000, 55000, 5000, 45000);
+  var e = new ol.Extent(45000, 5000, 55000, 15000);
   var tileBounds;
 
   tileBounds = tileGrid.getExtentTileBounds(0, e);
-  assertEquals(0, tileBounds.top);
-  assertEquals(0, tileBounds.right);
-  assertEquals(0, tileBounds.bottom);
-  assertEquals(0, tileBounds.left);
+  assertEquals(0, tileBounds.minY);
+  assertEquals(0, tileBounds.minX);
+  assertEquals(0, tileBounds.maxX);
+  assertEquals(0, tileBounds.maxY);
 
   tileBounds = tileGrid.getExtentTileBounds(1, e);
-  assertEquals(0, tileBounds.top);
-  assertEquals(1, tileBounds.right);
-  assertEquals(0, tileBounds.bottom);
-  assertEquals(0, tileBounds.left);
+  assertEquals(0, tileBounds.minX);
+  assertEquals(0, tileBounds.minY);
+  assertEquals(1, tileBounds.maxX);
+  assertEquals(0, tileBounds.maxY);
 
   tileBounds = tileGrid.getExtentTileBounds(2, e);
-  assertEquals(0, tileBounds.top);
-  assertEquals(2, tileBounds.right);
-  assertEquals(0, tileBounds.bottom);
-  assertEquals(1, tileBounds.left);
+  assertEquals(1, tileBounds.minX);
+  assertEquals(0, tileBounds.minY);
+  assertEquals(2, tileBounds.maxX);
+  assertEquals(0, tileBounds.maxY);
 
   tileBounds = tileGrid.getExtentTileBounds(3, e);
-  window.console.log(tileBounds);
-  assertEquals(0, tileBounds.top);
-  assertEquals(5, tileBounds.right);
-  assertEquals(1, tileBounds.bottom);
-  assertEquals(4, tileBounds.left);
+  assertEquals(4, tileBounds.minX);
+  assertEquals(0, tileBounds.minY);
+  assertEquals(5, tileBounds.maxX);
+  assertEquals(1, tileBounds.maxY);
 
 }
 
@@ -229,22 +228,22 @@ function testForEachTileCoordParent() {
   assertEquals(3, tileBoundss.length);
 
   assertEquals(2, zs[0]);
-  assertEquals(1, tileBoundss[0].top);
-  assertEquals(3, tileBoundss[0].right);
-  assertEquals(1, tileBoundss[0].bottom);
-  assertEquals(2, tileBoundss[0].left);
+  assertEquals(2, tileBoundss[0].minX);
+  assertEquals(1, tileBoundss[0].minY);
+  assertEquals(3, tileBoundss[0].maxX);
+  assertEquals(1, tileBoundss[0].maxY);
 
   assertEquals(1, zs[1]);
-  assertEquals(0, tileBoundss[1].top);
-  assertEquals(1, tileBoundss[1].right);
-  assertEquals(0, tileBoundss[1].bottom);
-  assertEquals(1, tileBoundss[1].left);
+  assertEquals(1, tileBoundss[1].minX);
+  assertEquals(0, tileBoundss[1].minY);
+  assertEquals(1, tileBoundss[1].maxX);
+  assertEquals(0, tileBoundss[1].maxY);
 
   assertEquals(0, zs[2]);
-  assertEquals(0, tileBoundss[2].top);
-  assertEquals(0, tileBoundss[2].right);
-  assertEquals(0, tileBoundss[2].bottom);
-  assertEquals(0, tileBoundss[2].left);
+  assertEquals(0, tileBoundss[2].minX);
+  assertEquals(0, tileBoundss[2].minY);
+  assertEquals(0, tileBoundss[2].maxX);
+  assertEquals(0, tileBoundss[2].maxY);
 
 }