diff --git a/src/ol/tilegrid/tilegrid.js b/src/ol/tilegrid/tilegrid.js
index 2edb3d720a..fa64282323 100644
--- a/src/ol/tilegrid/tilegrid.js
+++ b/src/ol/tilegrid/tilegrid.js
@@ -74,7 +74,7 @@ ol.tilegrid.TileGrid = function(options) {
 
   if (goog.isDef(extent) &&
       goog.isNull(this.origin_) && goog.isNull(this.origins_)) {
-    this.origin_ = ol.extent.getBottomLeft(extent);
+    this.origin_ = ol.extent.getTopLeft(extent);
   }
 
   goog.asserts.assert(
@@ -527,13 +527,13 @@ ol.tilegrid.getForProjection = function(projection) {
  * @param {number|ol.Size=} opt_tileSize Tile size (default uses
  *     ol.DEFAULT_TILE_SIZE).
  * @param {ol.extent.Corner=} opt_corner Extent corner (default is
- *     ol.extent.Corner.BOTTOM_LEFT).
+ *     ol.extent.Corner.TOP_LEFT).
  * @return {ol.tilegrid.TileGrid} TileGrid instance.
  */
 ol.tilegrid.createForExtent =
     function(extent, opt_maxZoom, opt_tileSize, opt_corner) {
   var corner = goog.isDef(opt_corner) ?
-      opt_corner : ol.extent.Corner.BOTTOM_LEFT;
+      opt_corner : ol.extent.Corner.TOP_LEFT;
 
   var resolutions = ol.tilegrid.resolutionsFromExtent(
       extent, opt_maxZoom, opt_tileSize);
diff --git a/test/spec/ol/source/tilearcgisrestsource.test.js b/test/spec/ol/source/tilearcgisrestsource.test.js
index c5f3eb631b..ada8bad986 100644
--- a/test/spec/ol/source/tilearcgisrestsource.test.js
+++ b/test/spec/ol/source/tilearcgisrestsource.test.js
@@ -15,7 +15,7 @@ describe('ol.source.TileArcGISRest', function() {
 
     it('returns a tile with the expected URL', function() {
       var source = new ol.source.TileArcGISRest(options);
-      var tile = source.getTile(3, 2, 1, 1, ol.proj.get('EPSG:3857'));
+      var tile = source.getTile(3, 2, -7, 1, ol.proj.get('EPSG:3857'));
       expect(tile).to.be.an(ol.ImageTile);
       var uri = new goog.Uri(tile.src_);
       expect(uri.getScheme()).to.be('http');
@@ -23,8 +23,8 @@ describe('ol.source.TileArcGISRest', function() {
       expect(uri.getPath()).to.be('/MapServer/export');
       var queryData = uri.getQueryData();
       expect(queryData.get('BBOX')).to.be(
-          '-10018754.171394622,-15028131.257091932,' +
-          '-5009377.085697311,-10018754.17139462');
+          '-10018754.171394622,-15028131.257091936,' +
+          '-5009377.085697311,-10018754.171394624');
       expect(queryData.get('FORMAT')).to.be('PNG32');
       expect(queryData.get('SIZE')).to.be('256,256');
       expect(queryData.get('IMAGESR')).to.be('3857');
@@ -39,7 +39,7 @@ describe('ol.source.TileArcGISRest', function() {
                       'http://test2.com/MapServer'];
       var source = new ol.source.TileArcGISRest(options);
 
-      var tile = source.getTile(3, 2, 1, 1, ol.proj.get('EPSG:3857'));
+      var tile = source.getTile(3, 2, -7, 1, ol.proj.get('EPSG:3857'));
       expect(tile).to.be.an(ol.ImageTile);
       var uri = new goog.Uri(tile.src_);
       expect(uri.getScheme()).to.be('http');
@@ -47,8 +47,8 @@ describe('ol.source.TileArcGISRest', function() {
       expect(uri.getPath()).to.be('/MapServer/export');
       var queryData = uri.getQueryData();
       expect(queryData.get('BBOX')).to.be(
-          '-10018754.171394622,-15028131.257091932,' +
-          '-5009377.085697311,-10018754.17139462');
+          '-10018754.171394622,-15028131.257091936,' +
+          '-5009377.085697311,-10018754.171394624');
       expect(queryData.get('FORMAT')).to.be('PNG32');
       expect(queryData.get('SIZE')).to.be('256,256');
       expect(queryData.get('IMAGESR')).to.be('3857');
@@ -60,7 +60,7 @@ describe('ol.source.TileArcGISRest', function() {
     it('returns a tile with the expected URL for ImageServer', function() {
       options.url = 'http://example.com/ImageServer';
       var source = new ol.source.TileArcGISRest(options);
-      var tile = source.getTile(3, 2, 1, 1, ol.proj.get('EPSG:3857'));
+      var tile = source.getTile(3, 2, -7, 1, ol.proj.get('EPSG:3857'));
       expect(tile).to.be.an(ol.ImageTile);
       var uri = new goog.Uri(tile.src_);
       expect(uri.getScheme()).to.be('http');
@@ -68,8 +68,8 @@ describe('ol.source.TileArcGISRest', function() {
       expect(uri.getPath()).to.be('/ImageServer/exportImage');
       var queryData = uri.getQueryData();
       expect(queryData.get('BBOX')).to.be(
-          '-10018754.171394622,-15028131.257091932,' +
-          '-5009377.085697311,-10018754.17139462');
+          '-10018754.171394622,-15028131.257091936,' +
+          '-5009377.085697311,-10018754.171394624');
       expect(queryData.get('FORMAT')).to.be('PNG32');
       expect(queryData.get('SIZE')).to.be('256,256');
       expect(queryData.get('IMAGESR')).to.be('3857');
@@ -81,7 +81,7 @@ describe('ol.source.TileArcGISRest', function() {
       options.params.FORMAT = 'png';
       options.params.TRANSPARENT = false;
       var source = new ol.source.TileArcGISRest(options);
-      var tile = source.getTile(3, 2, 1, 1, ol.proj.get('EPSG:4326'));
+      var tile = source.getTile(3, 2, -3, 1, ol.proj.get('EPSG:4326'));
       var uri = new goog.Uri(tile.src_);
       var queryData = uri.getQueryData();
       expect(queryData.get('FORMAT')).to.be('png');
@@ -91,7 +91,7 @@ describe('ol.source.TileArcGISRest', function() {
     it('allows adding rest option', function() {
       options.params.LAYERS = 'show:1,3,4';
       var source = new ol.source.TileArcGISRest(options);
-      var tile = source.getTile(3, 2, 1, 1, ol.proj.get('EPSG:4326'));
+      var tile = source.getTile(3, 2, -3, 1, ol.proj.get('EPSG:4326'));
       var uri = new goog.Uri(tile.src_);
       var queryData = uri.getQueryData();
       expect(queryData.get('LAYERS')).to.be('show:1,3,4');
@@ -104,7 +104,7 @@ describe('ol.source.TileArcGISRest', function() {
       var source = new ol.source.TileArcGISRest(options);
       source.updateParams({ 'TEST': 'value' });
 
-      var tile = source.getTile(3, 2, 1, 1, ol.proj.get('EPSG:3857'));
+      var tile = source.getTile(3, 2, -7, 1, ol.proj.get('EPSG:3857'));
       var uri = new goog.Uri(tile.src_);
       var queryData = uri.getQueryData();
 
@@ -117,7 +117,7 @@ describe('ol.source.TileArcGISRest', function() {
       var source = new ol.source.TileArcGISRest(options);
       source.updateParams({ 'TEST': 'newValue' });
 
-      var tile = source.getTile(3, 2, 1, 1, ol.proj.get('EPSG:3857'));
+      var tile = source.getTile(3, 2, -7, 1, ol.proj.get('EPSG:3857'));
       var uri = new goog.Uri(tile.src_);
       var queryData = uri.getQueryData();
 
diff --git a/test/spec/ol/source/tilesource.test.js b/test/spec/ol/source/tilesource.test.js
index b6c2a99030..df70ec4751 100644
--- a/test/spec/ol/source/tilesource.test.js
+++ b/test/spec/ol/source/tilesource.test.js
@@ -123,14 +123,14 @@ describe('ol.source.Tile', function() {
         wrapX: true
       });
 
-      var tileCoord = tileSource.getTileCoordForTileUrlFunction([6, -31, 22]);
-      expect(tileCoord).to.eql([6, 33, 22]);
+      var tileCoord = tileSource.getTileCoordForTileUrlFunction([6, -31, -23]);
+      expect(tileCoord).to.eql([6, 33, -23]);
 
-      tileCoord = tileSource.getTileCoordForTileUrlFunction([6, 33, 22]);
-      expect(tileCoord).to.eql([6, 33, 22]);
+      tileCoord = tileSource.getTileCoordForTileUrlFunction([6, 33, -23]);
+      expect(tileCoord).to.eql([6, 33, -23]);
 
-      tileCoord = tileSource.getTileCoordForTileUrlFunction([6, 97, 22]);
-      expect(tileCoord).to.eql([6, 33, 22]);
+      tileCoord = tileSource.getTileCoordForTileUrlFunction([6, 97, -23]);
+      expect(tileCoord).to.eql([6, 33, -23]);
     });
 
     it('returns the expected tile coordinate - {wrapX: false}', function() {
@@ -139,13 +139,13 @@ describe('ol.source.Tile', function() {
         wrapX: false
       });
 
-      var tileCoord = tileSource.getTileCoordForTileUrlFunction([6, -31, 22]);
+      var tileCoord = tileSource.getTileCoordForTileUrlFunction([6, -31, -23]);
       expect(tileCoord).to.eql(null);
 
-      tileCoord = tileSource.getTileCoordForTileUrlFunction([6, 33, 22]);
-      expect(tileCoord).to.eql([6, 33, 22]);
+      tileCoord = tileSource.getTileCoordForTileUrlFunction([6, 33, -23]);
+      expect(tileCoord).to.eql([6, 33, -23]);
 
-      tileCoord = tileSource.getTileCoordForTileUrlFunction([6, 97, 22]);
+      tileCoord = tileSource.getTileCoordForTileUrlFunction([6, 97, -23]);
       expect(tileCoord).to.eql(null);
     });
   });
diff --git a/test/spec/ol/source/tilewmssource.test.js b/test/spec/ol/source/tilewmssource.test.js
index 25bb6f73f4..8fcc0ac64e 100644
--- a/test/spec/ol/source/tilewmssource.test.js
+++ b/test/spec/ol/source/tilewmssource.test.js
@@ -17,7 +17,7 @@ describe('ol.source.TileWMS', function() {
 
     it('returns a tile with the expected URL', function() {
       var source = new ol.source.TileWMS(options);
-      var tile = source.getTile(3, 2, 1, 1, ol.proj.get('EPSG:3857'));
+      var tile = source.getTile(3, 2, -7, 1, ol.proj.get('EPSG:3857'));
       expect(tile).to.be.an(ol.ImageTile);
       var uri = new goog.Uri(tile.src_);
       expect(uri.getScheme()).to.be('http');
@@ -25,8 +25,8 @@ describe('ol.source.TileWMS', function() {
       expect(uri.getPath()).to.be('/wms');
       var queryData = uri.getQueryData();
       expect(queryData.get('BBOX')).to.be(
-          '-10018754.171394622,-15028131.257091932,' +
-          '-5009377.085697311,-10018754.17139462');
+          '-10018754.171394622,-15028131.257091936,' +
+          '-5009377.085697311,-10018754.171394624');
       expect(queryData.get('CRS')).to.be('EPSG:3857');
       expect(queryData.get('FORMAT')).to.be('image/png');
       expect(queryData.get('HEIGHT')).to.be('256');
@@ -44,13 +44,13 @@ describe('ol.source.TileWMS', function() {
     it('returns a larger tile when a gutter is specified', function() {
       options.gutter = 16;
       var source = new ol.source.TileWMS(options);
-      var tile = source.getTile(3, 2, 1, 1, ol.proj.get('EPSG:3857'));
+      var tile = source.getTile(3, 2, -7, 1, ol.proj.get('EPSG:3857'));
       expect(tile).to.be.an(ol.ImageTile);
       var uri = new goog.Uri(tile.src_);
       var queryData = uri.getQueryData();
       var bbox = queryData.get('BBOX').split(',');
-      var expected = [-10331840.239250705, -15341217.324948015,
-        -4696291.017841229, -9705668.103538537];
+      var expected = [-10331840.239250705, -15341217.324948018,
+        -4696291.017841229, -9705668.103538541];
       for (var i = 0, ii = bbox.length; i < ii; ++i) {
         expect(parseFloat(bbox[i])).to.roughlyEqual(expected[i], 1e-9);
       }
@@ -61,7 +61,7 @@ describe('ol.source.TileWMS', function() {
     it('sets the SRS query value instead of CRS if version < 1.3', function() {
       options.params.VERSION = '1.2';
       var source = new ol.source.TileWMS(options);
-      var tile = source.getTile(3, 2, 1, 1, ol.proj.get('EPSG:4326'));
+      var tile = source.getTile(3, 2, -3, 1, ol.proj.get('EPSG:4326'));
       var uri = new goog.Uri(tile.src_);
       var queryData = uri.getQueryData();
       expect(queryData.get('CRS')).to.be(undefined);
@@ -72,7 +72,7 @@ describe('ol.source.TileWMS', function() {
       options.params.FORMAT = 'image/jpeg';
       options.params.TRANSPARENT = false;
       var source = new ol.source.TileWMS(options);
-      var tile = source.getTile(3, 2, 1, 1, ol.proj.get('EPSG:4326'));
+      var tile = source.getTile(3, 2, -3, 1, ol.proj.get('EPSG:4326'));
       var uri = new goog.Uri(tile.src_);
       var queryData = uri.getQueryData();
       expect(queryData.get('FORMAT')).to.be('image/jpeg');
@@ -82,7 +82,7 @@ describe('ol.source.TileWMS', function() {
     it('does not add a STYLES= option if one is specified', function() {
       options.params.STYLES = 'foo';
       var source = new ol.source.TileWMS(options);
-      var tile = source.getTile(3, 2, 1, 1, ol.proj.get('EPSG:4326'));
+      var tile = source.getTile(3, 2, -3, 1, ol.proj.get('EPSG:4326'));
       var uri = new goog.Uri(tile.src_);
       var queryData = uri.getQueryData();
       expect(queryData.get('STYLES')).to.be('foo');
@@ -90,7 +90,7 @@ describe('ol.source.TileWMS', function() {
 
     it('changes the BBOX order for EN axis orientations', function() {
       var source = new ol.source.TileWMS(options);
-      var tile = source.getTile(3, 2, 1, 1, ol.proj.get('EPSG:4326'));
+      var tile = source.getTile(3, 2, -3, 1, ol.proj.get('EPSG:4326'));
       var uri = new goog.Uri(tile.src_);
       var queryData = uri.getQueryData();
       expect(queryData.get('BBOX')).to.be('-45,-90,0,-45');
@@ -99,7 +99,7 @@ describe('ol.source.TileWMS', function() {
     it('uses EN BBOX order if version < 1.3', function() {
       options.params.VERSION = '1.1.0';
       var source = new ol.source.TileWMS(options);
-      var tile = source.getTile(3, 2, 1, 1, ol.proj.get('CRS:84'));
+      var tile = source.getTile(3, 2, -3, 1, ol.proj.get('CRS:84'));
       var uri = new goog.Uri(tile.src_);
       var queryData = uri.getQueryData();
       expect(queryData.get('BBOX')).to.be('-90,-45,-45,0');
@@ -108,7 +108,7 @@ describe('ol.source.TileWMS', function() {
     it('sets FORMAT_OPTIONS when the server is GeoServer', function() {
       options.serverType = ol.source.wms.ServerType.GEOSERVER;
       var source = new ol.source.TileWMS(options);
-      var tile = source.getTile(3, 2, 1, 2, ol.proj.get('CRS:84'));
+      var tile = source.getTile(3, 2, -3, 2, ol.proj.get('CRS:84'));
       var uri = new goog.Uri(tile.src_);
       var queryData = uri.getQueryData();
       expect(queryData.get('FORMAT_OPTIONS')).to.be('dpi:180');
@@ -118,7 +118,7 @@ describe('ol.source.TileWMS', function() {
       options.serverType = ol.source.wms.ServerType.GEOSERVER;
       var source = new ol.source.TileWMS(options);
       options.params.FORMAT_OPTIONS = 'param1:value1';
-      var tile = source.getTile(3, 2, 1, 2, ol.proj.get('CRS:84'));
+      var tile = source.getTile(3, 2, -3, 2, ol.proj.get('CRS:84'));
       var uri = new goog.Uri(tile.src_);
       var queryData = uri.getQueryData();
       expect(queryData.get('FORMAT_OPTIONS')).to.be('param1:value1;dpi:180');
@@ -128,7 +128,7 @@ describe('ol.source.TileWMS', function() {
        function() {
          options.serverType = ol.source.wms.ServerType.GEOSERVER;
          var source = new ol.source.TileWMS(options);
-         var tile = source.getTile(3, 2, 1, 1.325, ol.proj.get('CRS:84'));
+         var tile = source.getTile(3, 2, -3, 1.325, ol.proj.get('CRS:84'));
          var uri = new goog.Uri(tile.src_);
          var queryData = uri.getQueryData();
          expect(queryData.get('FORMAT_OPTIONS')).to.be('dpi:119');
@@ -141,7 +141,7 @@ describe('ol.source.TileWMS', function() {
     it('returns a tile if it is contained within layers extent', function() {
       options.extent = [-80, -40, -50, -10];
       var source = new ol.source.TileWMS(options);
-      var tileCoord = [3, 2, 1];
+      var tileCoord = [3, 2, -3];
       var url = source.tileUrlFunction(tileCoord, 1, ol.proj.get('EPSG:4326'));
       var uri = new goog.Uri(url);
       var queryData = uri.getQueryData();
@@ -151,7 +151,7 @@ describe('ol.source.TileWMS', function() {
     it('returns a tile if it intersects layers extent', function() {
       options.extent = [-80, -40, -40, -10];
       var source = new ol.source.TileWMS(options);
-      var tileCoord = [3, 3, 1];
+      var tileCoord = [3, 3, -3];
       var url = source.tileUrlFunction(tileCoord, 1, ol.proj.get('EPSG:4326'));
       var uri = new goog.Uri(url);
       var queryData = uri.getQueryData();
@@ -165,7 +165,7 @@ describe('ol.source.TileWMS', function() {
         origin: [-180, -90]
       });
       var source = new ol.source.TileWMS(options);
-      var tileCoord = [3, 3, 1];
+      var tileCoord = [3, 3, -3];
       var url = source.tileUrlFunction(tileCoord, 1, ol.proj.get('EPSG:4326'));
       var uri = new goog.Uri(url);
       var queryData = uri.getQueryData();
@@ -190,8 +190,8 @@ describe('ol.source.TileWMS', function() {
       expect(uri.getPath()).to.be('/wms');
       var queryData = uri.getQueryData();
       expect(queryData.get('BBOX')).to.be(
-          '-10018754.171394622,-15028131.257091932,' +
-          '-5009377.085697311,-10018754.17139462');
+          '-10018754.171394622,-15028131.257091936,' +
+          '-5009377.085697311,-10018754.171394624');
       expect(queryData.get('CRS')).to.be('EPSG:3857');
       expect(queryData.get('FORMAT')).to.be('image/png');
       expect(queryData.get('HEIGHT')).to.be('256');
@@ -222,8 +222,8 @@ describe('ol.source.TileWMS', function() {
       expect(uri.getPath()).to.be('/wms');
       var queryData = uri.getQueryData();
       expect(queryData.get('BBOX')).to.be(
-          '-10018754.171394622,-15028131.257091932,' +
-          '-5009377.085697311,-10018754.17139462');
+          '-10018754.171394622,-15028131.257091936,' +
+          '-5009377.085697311,-10018754.171394624');
       expect(queryData.get('CRS')).to.be('EPSG:3857');
       expect(queryData.get('FORMAT')).to.be('image/png');
       expect(queryData.get('HEIGHT')).to.be('256');
diff --git a/test/spec/ol/tilecoord.test.js b/test/spec/ol/tilecoord.test.js
index 94477b0e5b..0ece77f8b6 100644
--- a/test/spec/ol/tilecoord.test.js
+++ b/test/spec/ol/tilecoord.test.js
@@ -47,21 +47,21 @@ describe('ol.TileCoord', function() {
         resolutions: [2, 1],
         minZoom: 1
       });
-      expect(ol.tilecoord.withinExtentAndZ([0, 0, 0], tileGrid)).to.be(false);
-      expect(ol.tilecoord.withinExtentAndZ([1, 0, 0], tileGrid)).to.be(true);
-      expect(ol.tilecoord.withinExtentAndZ([2, 0, 0], tileGrid)).to.be(false);
+      expect(ol.tilecoord.withinExtentAndZ([0, 0, -1], tileGrid)).to.be(false);
+      expect(ol.tilecoord.withinExtentAndZ([1, 0, -1], tileGrid)).to.be(true);
+      expect(ol.tilecoord.withinExtentAndZ([2, 0, -1], tileGrid)).to.be(false);
     });
 
     it('restricts by extent when extent defines tile ranges', function() {
       var tileGrid = new ol.tilegrid.TileGrid({
         extent: [10, 20, 30, 40],
-        sizes: [[3, 3]],
+        sizes: [[3, -3]],
         tileSize: 10,
         resolutions: [1]
       });
-      expect(ol.tilecoord.withinExtentAndZ([0, 1, 1], tileGrid)).to.be(true);
-      expect(ol.tilecoord.withinExtentAndZ([0, 2, 0], tileGrid)).to.be(false);
-      expect(ol.tilecoord.withinExtentAndZ([0, 0, 2], tileGrid)).to.be(false);
+      expect(ol.tilecoord.withinExtentAndZ([0, 1, -2], tileGrid)).to.be(true);
+      expect(ol.tilecoord.withinExtentAndZ([0, 2, -1], tileGrid)).to.be(false);
+      expect(ol.tilecoord.withinExtentAndZ([0, 0, -3], tileGrid)).to.be(false);
     });
 
     it('restricts by extent when sizes define tile ranges', function() {
@@ -79,6 +79,21 @@ describe('ol.TileCoord', function() {
       expect(ol.tilecoord.withinExtentAndZ([0, 0, 3], tileGrid)).to.be(false);
     });
 
+    it('restricts by extent when sizes (neg y) define tile ranges', function() {
+      var tileGrid = new ol.tilegrid.TileGrid({
+        origin: [10, 40],
+        sizes: [[3, -3]],
+        tileSize: 10,
+        resolutions: [1]
+      });
+      expect(ol.tilecoord.withinExtentAndZ([0, 0, -1], tileGrid)).to.be(true);
+      expect(ol.tilecoord.withinExtentAndZ([0, -1, -1], tileGrid)).to.be(false);
+      expect(ol.tilecoord.withinExtentAndZ([0, 0, 0], tileGrid)).to.be(false);
+      expect(ol.tilecoord.withinExtentAndZ([0, 2, -3], tileGrid)).to.be(true);
+      expect(ol.tilecoord.withinExtentAndZ([0, 3, -1], tileGrid)).to.be(false);
+      expect(ol.tilecoord.withinExtentAndZ([0, 0, -4], tileGrid)).to.be(false);
+    });
+
     it('does not restrict by extent with no extent or sizes', function() {
       var tileGrid = new ol.tilegrid.TileGrid({
         origin: [10, 20],
diff --git a/test/spec/ol/tilegrid/tilegrid.test.js b/test/spec/ol/tilegrid/tilegrid.test.js
index 9b2a4bc409..7e05e94744 100644
--- a/test/spec/ol/tilegrid/tilegrid.test.js
+++ b/test/spec/ol/tilegrid/tilegrid.test.js
@@ -205,16 +205,16 @@ describe('ol.tilegrid.TileGrid', function() {
       });
     });
 
-    it('assumes bottom left corner of extent as origin', function() {
-      expect(tileGrid.getOrigin()).to.eql([10, 20]);
+    it('assumes top left corner of extent as origin', function() {
+      expect(tileGrid.getOrigin()).to.eql([10, 40]);
     });
 
     it('calculates full tile ranges from extent', function() {
       var fullTileRange = tileGrid.getFullTileRange(0);
       expect(fullTileRange.minX).to.equal(0);
       expect(fullTileRange.maxX).to.equal(1);
-      expect(fullTileRange.minY).to.equal(0);
-      expect(fullTileRange.maxY).to.equal(1);
+      expect(fullTileRange.minY).to.equal(-2);
+      expect(fullTileRange.maxY).to.equal(-1);
     });
   });
 
@@ -223,7 +223,7 @@ describe('ol.tilegrid.TileGrid', function() {
     beforeEach(function() {
       tileGrid = new ol.tilegrid.TileGrid({
         extent: [10, 20, 30, 40],
-        sizes: [[3, 3]],
+        sizes: [[3, -3]],
         tileSize: 10,
         resolutions: [1]
       });
@@ -237,8 +237,8 @@ describe('ol.tilegrid.TileGrid', function() {
       var fullTileRange = tileGrid.getFullTileRange(0);
       expect(fullTileRange.minX).to.equal(0);
       expect(fullTileRange.maxX).to.equal(2);
-      expect(fullTileRange.minY).to.equal(0);
-      expect(fullTileRange.maxY).to.equal(2);
+      expect(fullTileRange.minY).to.equal(-3);
+      expect(fullTileRange.maxY).to.equal(-1);
     });
   });
 
@@ -253,13 +253,31 @@ describe('ol.tilegrid.TileGrid', function() {
       });
     });
 
-    it('calculates correct minX and maxX for negative heights', function() {
+    it('calculates correct minY and maxY for negative heights', function() {
       var fullTileRange = tileGrid.getFullTileRange(0);
       expect(fullTileRange.minY).to.equal(-3);
       expect(fullTileRange.maxY).to.equal(-1);
     });
   });
 
+  describe('create with bottom-left origin and sizes', function() {
+    var tileGrid;
+    beforeEach(function() {
+      tileGrid = new ol.tilegrid.TileGrid({
+        origin: [10, 10],
+        sizes: [[3, 3]],
+        tileSize: 10,
+        resolutions: [1]
+      });
+    });
+
+    it('calculates correct minX and maxX for positive heights', function() {
+      var fullTileRange = tileGrid.getFullTileRange(0);
+      expect(fullTileRange.minY).to.equal(0);
+      expect(fullTileRange.maxY).to.equal(2);
+    });
+  });
+
   describe('create with extent and origin', function() {
     it('uses both origin and extent', function() {
       var tileGrid = new ol.tilegrid.TileGrid({
@@ -281,7 +299,7 @@ describe('ol.tilegrid.TileGrid', function() {
 
       var resolutions = grid.getResolutions();
       expect(resolutions.length).to.be(ol.DEFAULT_MAX_ZOOM + 1);
-      expect(grid.getOrigin()).to.eql([-100, -100]);
+      expect(grid.getOrigin()).to.eql([-100, 100]);
     });
   });
 
@@ -324,12 +342,12 @@ describe('ol.tilegrid.TileGrid', function() {
           ol.DEFAULT_TILE_SIZE / Math.pow(2, 5));
     });
 
-    it('assumes origin is bottom-left', function() {
+    it('assumes origin is top-left', function() {
       var projection = ol.proj.get('EPSG:3857');
       var grid = ol.tilegrid.createForProjection(projection);
       var origin = grid.getOrigin();
       var half = ol.proj.EPSG3857.HALF_SIZE;
-      expect(origin).to.eql([-half, -half]);
+      expect(origin).to.eql([-half, half]);
     });
 
     it('accepts bottom-left as corner', function() {
diff --git a/test_rendering/spec/ol/layer/image.test.js b/test_rendering/spec/ol/layer/image.test.js
index 4ba4c44eb0..cd1c287dbe 100644
--- a/test_rendering/spec/ol/layer/image.test.js
+++ b/test_rendering/spec/ol/layer/image.test.js
@@ -56,7 +56,7 @@ describe('ol.rendering.layer.Image', function() {
       source = new ol.source.ImageStatic({
         url: 'spec/ol/data/tiles/osm/5/5/12.png',
         imageExtent: ol.tilegrid.createXYZ().getTileCoordExtent(
-            [5, 5, 32 - 12 - 1]),
+            [5, 5, -12 - 1]),
         projection: ol.proj.get('EPSG:3857')
       });
     });