diff --git a/src/ol/extent.js b/src/ol/extent.js
index c352b62b6f..2f118d5001 100644
--- a/src/ol/extent.js
+++ b/src/ol/extent.js
@@ -307,18 +307,6 @@ ol.extent.createOrUpdateFromRings = function(rings, opt_extent) {
 };
 
 
-/**
- * Empty an extent in place.
- * @param {ol.Extent} extent Extent.
- * @return {ol.Extent} Extent.
- */
-ol.extent.empty = function(extent) {
-  extent[0] = extent[1] = Infinity;
-  extent[2] = extent[3] = -Infinity;
-  return extent;
-};
-
-
 /**
  * Determine if two extents are equivalent.
  * @param {ol.Extent} extent1 Extent 1.
@@ -720,29 +708,6 @@ ol.extent.isEmpty = function(extent) {
 };
 
 
-/**
- * @param {ol.Extent} extent Extent.
- * @return {boolean} Is infinite.
- */
-ol.extent.isInfinite = function(extent) {
-  return extent[0] == -Infinity || extent[1] == -Infinity ||
-      extent[2] == Infinity || extent[3] == Infinity;
-};
-
-
-/**
- * @param {ol.Extent} extent Extent.
- * @param {ol.Coordinate} coordinate Coordinate.
- * @return {ol.Coordinate} Coordinate.
- */
-ol.extent.normalize = function(extent, coordinate) {
-  return [
-    (coordinate[0] - extent[0]) / (extent[2] - extent[0]),
-    (coordinate[1] - extent[1]) / (extent[3] - extent[1])
-  ];
-};
-
-
 /**
  * @param {ol.Extent} extent Extent.
  * @param {ol.Extent=} opt_extent Extent.
@@ -831,19 +796,6 @@ ol.extent.intersectsSegment = function(extent, start, end) {
 };
 
 
-/**
- * @param {ol.Extent} extent1 Extent 1.
- * @param {ol.Extent} extent2 Extent 2.
- * @return {boolean} Touches.
- */
-ol.extent.touches = function(extent1, extent2) {
-  var intersects = ol.extent.intersects(extent1, extent2);
-  return intersects &&
-      (extent1[0] == extent2[2] || extent1[2] == extent2[0] ||
-       extent1[1] == extent2[3] || extent1[3] == extent2[1]);
-};
-
-
 /**
  * Apply a transform function to the extent.
  * @param {ol.Extent} extent Extent.
diff --git a/test/spec/ol/extent.test.js b/test/spec/ol/extent.test.js
index b8406104d8..e2483b7af5 100644
--- a/test/spec/ol/extent.test.js
+++ b/test/spec/ol/extent.test.js
@@ -167,24 +167,6 @@ describe('ol.extent', function() {
 
   });
 
-  describe('empty', function() {
-
-    it('returns the empty extent', function() {
-      var extent = [1, 2, 3, 4];
-      var expected = [Infinity, Infinity, -Infinity, -Infinity];
-      var got = ol.extent.empty(extent);
-      expect(got).to.eql(expected);
-    });
-
-    it('empties a passed extent in place', function() {
-      var extent = [1, 2, 3, 4];
-      var expected = [Infinity, Infinity, -Infinity, -Infinity];
-      ol.extent.empty(extent);
-      expect(extent).to.eql(expected);
-    });
-
-  });
-
   describe('forEachCorner', function() {
 
     var callbackFalse;
@@ -602,73 +584,6 @@ describe('ol.extent', function() {
     });
   });
 
-  describe('isInfinite', function() {
-    it('returns true for infinite extents', function() {
-      var extents = [
-        [-Infinity, 0, 0, 0],
-        [0, -Infinity, 0, 0],
-        [0, 0, +Infinity, 0],
-        [0, 0, 0, +Infinity]
-      ];
-      expect(ol.extent.isInfinite(extents[0])).to.be(true);
-      expect(ol.extent.isInfinite(extents[1])).to.be(true);
-      expect(ol.extent.isInfinite(extents[2])).to.be(true);
-      expect(ol.extent.isInfinite(extents[3])).to.be(true);
-    });
-    it('returns false for other extents', function() {
-      var extents = [
-        ol.extent.createEmpty(),
-        [1, 2, 3, 4]
-      ];
-      expect(ol.extent.isInfinite(extents[0])).to.be(false);
-      expect(ol.extent.isInfinite(extents[1])).to.be(false);
-    });
-  });
-
-  describe('touches', function() {
-
-    it('returns the expected value', function() {
-      var touches = ol.extent.touches;
-      var extent = [50, 50, 100, 100];
-      expect(touches(extent, [20, 20, 80, 80])).to.be(false);
-      expect(touches(extent, [20, 20, 50, 80])).to.be(true);
-      expect(touches(extent, [20, 20, 50, 40])).to.be(false);
-      expect(touches(extent, [100, 20, 140, 80])).to.be(true);
-      expect(touches(extent, [100, 20, 140, 40])).to.be(false);
-      expect(touches(extent, [20, 20, 80, 50])).to.be(true);
-      expect(touches(extent, [20, 20, 40, 50])).to.be(false);
-      expect(touches(extent, [20, 100, 80, 140])).to.be(true);
-      expect(touches(extent, [20, 100, 40, 140])).to.be(false);
-    });
-  });
-
-  describe('normalize', function() {
-    it('returns the expected coordinate', function() {
-      var extent = [0, 1, 2, 3];
-      var coordinate;
-
-      coordinate = ol.extent.normalize(extent, [1, 2]);
-      expect(coordinate[0]).to.eql(0.5);
-      expect(coordinate[1]).to.eql(0.5);
-
-      coordinate = ol.extent.normalize(extent, [0, 3]);
-      expect(coordinate[0]).to.eql(0);
-      expect(coordinate[1]).to.eql(1);
-
-      coordinate = ol.extent.normalize(extent, [2, 1]);
-      expect(coordinate[0]).to.eql(1);
-      expect(coordinate[1]).to.eql(0);
-
-      coordinate = ol.extent.normalize(extent, [0, 0]);
-      expect(coordinate[0]).to.eql(0);
-      expect(coordinate[1]).to.eql(-0.5);
-
-      coordinate = ol.extent.normalize(extent, [-1, 1]);
-      expect(coordinate[0]).to.eql(-0.5);
-      expect(coordinate[1]).to.eql(0);
-    });
-  });
-
   describe('scaleFromCenter', function() {
     it('scales the extent from its center', function() {
       var extent = [1, 1, 3, 3];