diff --git a/.gitignore b/.gitignore
index 26c170bec9..4ba6e46ecf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
 *.pyc
 /bin/plovr*.jar
 /build/gh-pages
+/build/check-requires-timestamp
 /build/jsdoc-*-timestamp
 /build/lint-spec-timestamp
 /build/lint-src-timestamp
diff --git a/build.py b/build.py
index 5dca545c20..d0252c07b8 100755
--- a/build.py
+++ b/build.py
@@ -187,7 +187,7 @@ def serve_precommit(t):
     t.run('%(JAVA)s', '-jar', PLOVR_JAR, 'serve', 'build/ol-all.json')
 
 
-virtual('lint', 'build/lint-src-timestamp', 'build/lint-spec-timestamp')
+virtual('lint', 'build/lint-src-timestamp', 'build/lint-spec-timestamp', 'build/check-requires-timestamp')
 
 
 @target('build/lint-src-timestamp', SRC, INTERNAL_SRC, EXTERNAL_SRC, EXAMPLES_SRC)
@@ -199,6 +199,72 @@ def build_lint_src_timestamp(t):
     t.touch()
 
 
+@target('build/check-requires-timestamp', SRC, INTERNAL_SRC, EXTERNAL_SRC, EXAMPLES_SRC)
+def build_check_requires_timestamp(t):
+    unused_count = 0
+    all_provides = set()
+    for filename in sorted(t.dependencies):
+        if filename == 'build/src/internal/src/requireall.js':
+            continue
+        require_linenos = {}
+        uses = set()
+        lineno = 0
+        for line in open(filename):
+            lineno += 1
+            m = re.match(r'goog.provide\(\'(.*)\'\);', line)
+            if m:
+                all_provides.add(m.group(1))
+                continue
+            m = re.match(r'goog.require\(\'(.*)\'\);', line)
+            if m:
+                require_linenos[m.group(1)] = lineno
+                continue
+            for require in require_linenos.iterkeys():
+                if require in line:
+                    uses.add(require)
+        for require in sorted(set(require_linenos.keys()) - uses):
+            t.info('%s:%d: unused goog.require: %r' % (filename, require_linenos[require], require))
+            unused_count += 1
+    all_provides.discard('ol')
+    all_provides.discard('ol.Map')
+    all_provides.discard('ol.MapProperty')
+    provide_res = dict((provide, re.compile(r'\b%s\b' % (re.escape(provide)),)) for provide in all_provides)
+    missing_count = 0
+    for filename in sorted(t.dependencies):
+        if filename in INTERNAL_SRC or filename in EXTERNAL_SRC:
+            continue
+        provides = set()
+        requires = set()
+        uses = set()
+        lineno = 0
+        for line in open(filename):
+            lineno += 1
+            m = re.match(r'goog.provide\(\'(.*)\'\);', line)
+            if m:
+                provides.add(m.group(1))
+                continue
+            m = re.match(r'goog.require\(\'(.*)\'\);', line)
+            if m:
+                requires.add(m.group(1))
+                continue
+            for provide, provide_re in provide_res.iteritems():
+                if provide_re.search(line):
+                    uses.add(provide)
+        if filename == 'src/ol/renderer/layerrenderer.js':
+            uses.discard('ol.renderer.Map')
+        m = re.match(r'src/ol/renderer/(\w+)/\1(\w*)layerrenderer\.js\Z', filename)
+        if m:
+            uses.discard('ol.renderer.Map')
+            uses.discard('ol.renderer.%s.Map' % (m.group(1),))
+        missing_requires = uses - requires - provides
+        if missing_requires:
+            t.info('%s: missing goog.requires: %s', filename, ', '.join(sorted(missing_requires)))
+            missing_count += len(missing_requires)
+    if unused_count or missing_count:
+        t.error('%d unused goog.requires, %d missing goog.requires' % (unused_count, missing_count))
+    t.touch()
+
+
 @target('build/lint-spec-timestamp', SPEC)
 def build_lint_spec_timestamp(t):
     t.run('%(GJSLINT)s', t.newer(SPEC))
diff --git a/examples/anchored-elements.js b/examples/anchored-elements.js
index 80fac6d6bf..40ee7e71c3 100644
--- a/examples/anchored-elements.js
+++ b/examples/anchored-elements.js
@@ -5,8 +5,10 @@ goog.require('ol.AnchoredElement');
 goog.require('ol.Collection');
 goog.require('ol.Coordinate');
 goog.require('ol.Map');
+goog.require('ol.Projection');
 goog.require('ol.RendererHints');
 goog.require('ol.View2D');
+goog.require('ol.layer.TileLayer');
 goog.require('ol.source.MapQuestOpenAerial');
 
 
diff --git a/examples/canvas-tiles.js b/examples/canvas-tiles.js
index d8a0951754..76b35d0bd9 100644
--- a/examples/canvas-tiles.js
+++ b/examples/canvas-tiles.js
@@ -3,9 +3,11 @@ goog.require('ol.Coordinate');
 goog.require('ol.Map');
 goog.require('ol.Projection');
 goog.require('ol.RendererHint');
+goog.require('ol.View2D');
 goog.require('ol.layer.TileLayer');
 goog.require('ol.source.DebugTileSource');
 goog.require('ol.source.OpenStreetMap');
+goog.require('ol.tilegrid.XYZ');
 
 
 var layers = new ol.Collection([
diff --git a/examples/full-screen.js b/examples/full-screen.js
index 0228a84c5c..3e9cce6f89 100644
--- a/examples/full-screen.js
+++ b/examples/full-screen.js
@@ -6,6 +6,7 @@ goog.require('ol.Coordinate');
 goog.require('ol.Map');
 goog.require('ol.RendererHints');
 goog.require('ol.View2D');
+goog.require('ol.layer.TileLayer');
 goog.require('ol.source.MapQuestOpenAerial');
 
 
diff --git a/examples/side-by-side.js b/examples/side-by-side.js
index 017b072750..4c5bb354b7 100644
--- a/examples/side-by-side.js
+++ b/examples/side-by-side.js
@@ -1,12 +1,15 @@
 goog.require('goog.debug.Console');
 goog.require('goog.debug.Logger');
 goog.require('goog.debug.Logger.Level');
+goog.require('ol.Collection');
 goog.require('ol.Coordinate');
 goog.require('ol.Map');
+goog.require('ol.Projection');
 goog.require('ol.RendererHint');
 goog.require('ol.View2D');
 goog.require('ol.animation');
 goog.require('ol.control.MousePosition');
+goog.require('ol.easing');
 goog.require('ol.interaction.Keyboard');
 goog.require('ol.layer.TileLayer');
 goog.require('ol.source.MapQuestOpenAerial');
diff --git a/examples/two-layers.js b/examples/two-layers.js
index 884f8db98f..2791d2e201 100644
--- a/examples/two-layers.js
+++ b/examples/two-layers.js
@@ -1,3 +1,4 @@
+goog.require('ol.BingMapsStyle');
 goog.require('ol.Collection');
 goog.require('ol.Coordinate');
 goog.require('ol.Map');
diff --git a/examples/wms-custom-proj.js b/examples/wms-custom-proj.js
index ae6dea5cc9..d389451935 100644
--- a/examples/wms-custom-proj.js
+++ b/examples/wms-custom-proj.js
@@ -1,12 +1,16 @@
 goog.require('goog.debug.Console');
 goog.require('goog.debug.Logger');
 goog.require('goog.debug.Logger.Level');
+goog.require('ol.Attribution');
 goog.require('ol.Collection');
 goog.require('ol.Coordinate');
+goog.require('ol.Extent');
 goog.require('ol.Map');
 goog.require('ol.Projection');
+goog.require('ol.ProjectionUnits');
 goog.require('ol.RendererHints');
 goog.require('ol.View2D');
+goog.require('ol.layer.TileLayer');
 goog.require('ol.source.TiledWMS');
 
 
diff --git a/examples/wms.js b/examples/wms.js
index 18788dd342..e6fdc597d6 100644
--- a/examples/wms.js
+++ b/examples/wms.js
@@ -3,8 +3,11 @@ goog.require('goog.debug.Logger');
 goog.require('goog.debug.Logger.Level');
 goog.require('ol.Collection');
 goog.require('ol.Coordinate');
+goog.require('ol.Extent');
 goog.require('ol.Map');
+goog.require('ol.RendererHint');
 goog.require('ol.View2D');
+goog.require('ol.layer.TileLayer');
 goog.require('ol.source.MapQuestOpenAerial');
 goog.require('ol.source.TiledWMS');
 
diff --git a/src/ol/animation.js b/src/ol/animation.js
index 958817aa2e..feccd87f06 100644
--- a/src/ol/animation.js
+++ b/src/ol/animation.js
@@ -1,10 +1,10 @@
 // FIXME works for View2D only
-// FIXME dependency on ol.View2D suppressed to prevent dependency loop
 
 goog.provide('ol.animation');
 
 goog.require('goog.fx.easing');
 goog.require('ol.PreRenderFunction');
+goog.require('ol.ViewHint');
 goog.require('ol.easing');
 
 
diff --git a/src/ol/attribution.js b/src/ol/attribution.js
index 4b4c8886e2..cc353c36df 100644
--- a/src/ol/attribution.js
+++ b/src/ol/attribution.js
@@ -1,5 +1,7 @@
 goog.provide('ol.Attribution');
 
+goog.require('ol.TileRange');
+
 
 
 /**
diff --git a/src/ol/collection.js b/src/ol/collection.js
index cce5dc87cd..f1de3a535e 100644
--- a/src/ol/collection.js
+++ b/src/ol/collection.js
@@ -9,7 +9,6 @@ goog.provide('ol.CollectionEvent');
 goog.provide('ol.CollectionEventType');
 
 goog.require('goog.array');
-goog.require('goog.asserts');
 goog.require('goog.events.Event');
 goog.require('ol.Object');
 
diff --git a/src/ol/control/attributioncontrol.js b/src/ol/control/attributioncontrol.js
index e8da8080b8..d6f707ea56 100644
--- a/src/ol/control/attributioncontrol.js
+++ b/src/ol/control/attributioncontrol.js
@@ -8,8 +8,12 @@ goog.require('goog.dom.TagName');
 goog.require('goog.events');
 goog.require('goog.object');
 goog.require('goog.style');
+goog.require('ol.Attribution');
+goog.require('ol.MapEvent');
 goog.require('ol.MapEventType');
+goog.require('ol.TileRange');
 goog.require('ol.control.Control');
+goog.require('ol.source.TileSource');
 
 
 
diff --git a/src/ol/control/dragboxcontrol.js b/src/ol/control/dragboxcontrol.js
index abe92d5e4d..5fcbc51596 100644
--- a/src/ol/control/dragboxcontrol.js
+++ b/src/ol/control/dragboxcontrol.js
@@ -5,6 +5,10 @@ goog.require('goog.dom');
 goog.require('goog.dom.TagName');
 goog.require('goog.events');
 goog.require('goog.style');
+goog.require('ol.Coordinate');
+goog.require('ol.MapBrowserEvent');
+goog.require('ol.MapBrowserEvent.EventType');
+goog.require('ol.Pixel');
 goog.require('ol.Size');
 goog.require('ol.control.Control');
 
diff --git a/src/ol/control/mousepositioncontrol.js b/src/ol/control/mousepositioncontrol.js
index a20c25a1cd..a34d470c7c 100644
--- a/src/ol/control/mousepositioncontrol.js
+++ b/src/ol/control/mousepositioncontrol.js
@@ -8,7 +8,9 @@ goog.require('goog.dom');
 goog.require('goog.events');
 goog.require('goog.events.EventType');
 goog.require('goog.style');
-goog.require('ol.Object');
+goog.require('ol.CoordinateFormatType');
+goog.require('ol.MapEvent');
+goog.require('ol.MapEventType');
 goog.require('ol.Pixel');
 goog.require('ol.Projection');
 goog.require('ol.TransformFunction');
diff --git a/src/ol/control/zoomcontrol.js b/src/ol/control/zoomcontrol.js
index 96c83d703d..6d99bbd80f 100644
--- a/src/ol/control/zoomcontrol.js
+++ b/src/ol/control/zoomcontrol.js
@@ -7,7 +7,6 @@ goog.require('goog.dom.TagName');
 goog.require('goog.events');
 goog.require('goog.events.EventType');
 goog.require('ol.BrowserFeature');
-goog.require('ol.Projection');
 goog.require('ol.control.Control');
 
 
diff --git a/src/ol/framestate.js b/src/ol/framestate.js
index 6f06b5fff6..bbe89d10a0 100644
--- a/src/ol/framestate.js
+++ b/src/ol/framestate.js
@@ -7,12 +7,12 @@ goog.provide('ol.PreRenderFunction');
 
 goog.require('goog.vec.Mat4');
 goog.require('ol.Color');
-goog.require('ol.Coordinate');
 goog.require('ol.Extent');
 goog.require('ol.Size');
 goog.require('ol.TileQueue');
 goog.require('ol.TileRange');
 goog.require('ol.View2DState');
+goog.require('ol.layer.Layer');
 goog.require('ol.layer.LayerState');
 
 
diff --git a/src/ol/imagetile.js b/src/ol/imagetile.js
index 12255034e3..3d3a972385 100644
--- a/src/ol/imagetile.js
+++ b/src/ol/imagetile.js
@@ -2,7 +2,6 @@ goog.provide('ol.ImageTile');
 
 goog.require('goog.array');
 goog.require('goog.events');
-goog.require('goog.events.EventTarget');
 goog.require('goog.events.EventType');
 goog.require('ol.Tile');
 goog.require('ol.TileCoord');
diff --git a/src/ol/interaction/draginteraction.js b/src/ol/interaction/draginteraction.js
index 1d525bae7d..ce39c4f9d3 100644
--- a/src/ol/interaction/draginteraction.js
+++ b/src/ol/interaction/draginteraction.js
@@ -1,11 +1,10 @@
-
 goog.provide('ol.interaction.Drag');
 
 goog.require('goog.asserts');
-goog.require('goog.events.EventType');
 goog.require('goog.functions');
 goog.require('ol.Coordinate');
 goog.require('ol.MapBrowserEvent');
+goog.require('ol.MapBrowserEvent.EventType');
 goog.require('ol.interaction.Interaction');
 
 
diff --git a/src/ol/interaction/dragpaninteraction.js b/src/ol/interaction/dragpaninteraction.js
index 5c516d62ff..6cca9a096d 100644
--- a/src/ol/interaction/dragpaninteraction.js
+++ b/src/ol/interaction/dragpaninteraction.js
@@ -4,7 +4,9 @@ goog.provide('ol.interaction.DragPan');
 
 goog.require('goog.asserts');
 goog.require('ol.Coordinate');
-goog.require('ol.MapBrowserEvent');
+goog.require('ol.Kinetic');
+goog.require('ol.Pixel');
+goog.require('ol.PreRenderFunction');
 goog.require('ol.View2D');
 goog.require('ol.ViewHint');
 goog.require('ol.interaction.ConditionType');
diff --git a/src/ol/interaction/dragrotateandzoominteraction.js b/src/ol/interaction/dragrotateandzoominteraction.js
index 314ee9227f..95df6f5320 100644
--- a/src/ol/interaction/dragrotateandzoominteraction.js
+++ b/src/ol/interaction/dragrotateandzoominteraction.js
@@ -3,7 +3,6 @@
 goog.provide('ol.interaction.DragRotateAndZoom');
 
 goog.require('goog.math.Vec2');
-goog.require('ol.MapBrowserEvent');
 goog.require('ol.View2D');
 goog.require('ol.interaction.ConditionType');
 goog.require('ol.interaction.Drag');
diff --git a/src/ol/interaction/dragrotateinteraction.js b/src/ol/interaction/dragrotateinteraction.js
index 2b6e12bbbb..f951f6fd2c 100644
--- a/src/ol/interaction/dragrotateinteraction.js
+++ b/src/ol/interaction/dragrotateinteraction.js
@@ -1,6 +1,5 @@
 goog.provide('ol.interaction.DragRotate');
 
-goog.require('ol.MapBrowserEvent');
 goog.require('ol.View2D');
 goog.require('ol.interaction.ConditionType');
 goog.require('ol.interaction.Drag');
diff --git a/src/ol/interaction/dragzoominteraction.js b/src/ol/interaction/dragzoominteraction.js
index a64437acda..74541b4bab 100644
--- a/src/ol/interaction/dragzoominteraction.js
+++ b/src/ol/interaction/dragzoominteraction.js
@@ -4,7 +4,8 @@
 goog.provide('ol.interaction.DragZoom');
 
 goog.require('ol.Extent');
-goog.require('ol.MapBrowserEvent');
+goog.require('ol.Size');
+goog.require('ol.View2D');
 goog.require('ol.control.DragBox');
 goog.require('ol.interaction.ConditionType');
 goog.require('ol.interaction.Drag');
diff --git a/src/ol/interaction/keyboardpaninteraction.js b/src/ol/interaction/keyboardpaninteraction.js
index 384b7d9d4c..f45a139e4e 100644
--- a/src/ol/interaction/keyboardpaninteraction.js
+++ b/src/ol/interaction/keyboardpaninteraction.js
@@ -4,6 +4,7 @@ goog.provide('ol.interaction.KeyboardPan');
 
 goog.require('goog.events.KeyCodes');
 goog.require('goog.events.KeyHandler.EventType');
+goog.require('ol.Coordinate');
 goog.require('ol.View2D');
 goog.require('ol.interaction.Interaction');
 
diff --git a/src/ol/interaction/keyboardzoominteraction.js b/src/ol/interaction/keyboardzoominteraction.js
index 9252cc652c..563827ab45 100644
--- a/src/ol/interaction/keyboardzoominteraction.js
+++ b/src/ol/interaction/keyboardzoominteraction.js
@@ -2,7 +2,6 @@
 
 goog.provide('ol.interaction.KeyboardZoom');
 
-goog.require('goog.events.KeyCodes');
 goog.require('goog.events.KeyHandler.EventType');
 goog.require('ol.View2D');
 goog.require('ol.interaction.Interaction');
diff --git a/src/ol/interaction/mousewheelzoominteraction.js b/src/ol/interaction/mousewheelzoominteraction.js
index 7e3c1769ac..a0e8f52cc9 100644
--- a/src/ol/interaction/mousewheelzoominteraction.js
+++ b/src/ol/interaction/mousewheelzoominteraction.js
@@ -4,8 +4,8 @@ goog.provide('ol.interaction.MouseWheelZoom');
 
 goog.require('goog.events.MouseWheelEvent');
 goog.require('goog.events.MouseWheelHandler.EventType');
-goog.require('ol.MapBrowserEvent');
 goog.require('ol.View2D');
+goog.require('ol.interaction.Interaction');
 
 
 
diff --git a/src/ol/iview2d.js b/src/ol/iview2d.js
index e8dcb0c4db..ad1d28f564 100644
--- a/src/ol/iview2d.js
+++ b/src/ol/iview2d.js
@@ -2,7 +2,6 @@ goog.provide('ol.IView2D');
 goog.provide('ol.View2DState');
 
 goog.require('ol.Coordinate');
-goog.require('ol.Extent');
 goog.require('ol.Projection');
 
 
diff --git a/src/ol/kinetic.js b/src/ol/kinetic.js
index 44aabe850b..5be0754ead 100644
--- a/src/ol/kinetic.js
+++ b/src/ol/kinetic.js
@@ -1,8 +1,8 @@
 
 goog.provide('ol.Kinetic');
 
-goog.require('goog.array');
-goog.require('ol.Pixel');
+goog.require('ol.Coordinate');
+goog.require('ol.PreRenderFunction');
 goog.require('ol.animation');
 
 
diff --git a/src/ol/map.js b/src/ol/map.js
index 22609eb4a6..58925d8443 100644
--- a/src/ol/map.js
+++ b/src/ol/map.js
@@ -10,7 +10,6 @@ goog.provide('ol.RendererHints');
 goog.require('goog.Uri.QueryData');
 goog.require('goog.async.AnimationDelay');
 goog.require('goog.debug.Logger');
-goog.require('goog.dispose');
 goog.require('goog.dom');
 goog.require('goog.dom.ViewportSizeMonitor');
 goog.require('goog.events');
@@ -19,29 +18,35 @@ goog.require('goog.events.Event');
 goog.require('goog.events.EventType');
 goog.require('goog.events.KeyHandler');
 goog.require('goog.events.KeyHandler.EventType');
-goog.require('goog.events.MouseWheelEvent');
 goog.require('goog.events.MouseWheelHandler');
 goog.require('goog.events.MouseWheelHandler.EventType');
-goog.require('goog.object');
 goog.require('ol.BrowserFeature');
 goog.require('ol.Collection');
+goog.require('ol.CollectionEvent');
+goog.require('ol.CollectionEventType');
 goog.require('ol.Color');
 goog.require('ol.Coordinate');
 goog.require('ol.Extent');
 goog.require('ol.FrameState');
+goog.require('ol.IView');
 goog.require('ol.Kinetic');
 goog.require('ol.MapBrowserEvent');
+goog.require('ol.MapBrowserEvent.EventType');
+goog.require('ol.MapBrowserEventHandler');
+goog.require('ol.MapEvent');
+goog.require('ol.MapEventType');
 goog.require('ol.Object');
+goog.require('ol.ObjectEventType');
 goog.require('ol.Pixel');
-goog.require('ol.ResolutionConstraint');
-goog.require('ol.RotationConstraint');
+goog.require('ol.PostRenderFunction');
+goog.require('ol.PreRenderFunction');
 goog.require('ol.Size');
+goog.require('ol.Tile');
 goog.require('ol.TileQueue');
-goog.require('ol.TransformFunction');
 goog.require('ol.View');
 goog.require('ol.View2D');
-goog.require('ol.View2DState');
 goog.require('ol.control.Attribution');
+goog.require('ol.control.Control');
 goog.require('ol.control.Zoom');
 goog.require('ol.interaction.DblClickZoom');
 goog.require('ol.interaction.DragPan');
@@ -52,14 +57,14 @@ goog.require('ol.interaction.KeyboardPan');
 goog.require('ol.interaction.KeyboardZoom');
 goog.require('ol.interaction.MouseWheelZoom');
 goog.require('ol.interaction.condition');
-goog.require('ol.renderer.Layer');
+goog.require('ol.layer.Layer');
 goog.require('ol.renderer.Map');
-goog.require('ol.renderer.canvas');
 goog.require('ol.renderer.canvas.Map');
-goog.require('ol.renderer.dom');
+goog.require('ol.renderer.canvas.isSupported');
 goog.require('ol.renderer.dom.Map');
-goog.require('ol.renderer.webgl');
+goog.require('ol.renderer.dom.isSupported');
 goog.require('ol.renderer.webgl.Map');
+goog.require('ol.renderer.webgl.isSupported');
 
 
 /**
diff --git a/src/ol/mapbrowserevent.js b/src/ol/mapbrowserevent.js
index a6b0f20be7..079f43b47b 100644
--- a/src/ol/mapbrowserevent.js
+++ b/src/ol/mapbrowserevent.js
@@ -10,6 +10,7 @@ goog.require('goog.events.EventType');
 goog.require('goog.style');
 goog.require('ol.BrowserFeature');
 goog.require('ol.Coordinate');
+goog.require('ol.FrameState');
 goog.require('ol.MapEvent');
 goog.require('ol.Pixel');
 
diff --git a/src/ol/renderer/canvas/canvaslayerrenderer.js b/src/ol/renderer/canvas/canvaslayerrenderer.js
index f63048d8e3..074e1b87a1 100644
--- a/src/ol/renderer/canvas/canvaslayerrenderer.js
+++ b/src/ol/renderer/canvas/canvaslayerrenderer.js
@@ -1,5 +1,6 @@
 goog.provide('ol.renderer.canvas.Layer');
 
+goog.require('ol.layer.Layer');
 goog.require('ol.renderer.Layer');
 
 
diff --git a/src/ol/renderer/canvas/canvasrenderer.js b/src/ol/renderer/canvas/canvasrenderer.js
index f28861dcdc..85dc1d77a1 100644
--- a/src/ol/renderer/canvas/canvasrenderer.js
+++ b/src/ol/renderer/canvas/canvasrenderer.js
@@ -1,4 +1,4 @@
-goog.provide('ol.renderer.canvas');
+goog.provide('ol.renderer.canvas.isSupported');
 
 goog.require('ol.canvas');
 
diff --git a/src/ol/renderer/canvas/canvastilelayerrenderer.js b/src/ol/renderer/canvas/canvastilelayerrenderer.js
index de1008c364..59b0c6051c 100644
--- a/src/ol/renderer/canvas/canvastilelayerrenderer.js
+++ b/src/ol/renderer/canvas/canvastilelayerrenderer.js
@@ -6,10 +6,11 @@ goog.provide('ol.renderer.canvas.TileLayer');
 
 goog.require('goog.array');
 goog.require('goog.dom');
-goog.require('goog.style');
 goog.require('goog.vec.Mat4');
 goog.require('ol.Size');
-goog.require('ol.TileRange');
+goog.require('ol.Tile');
+goog.require('ol.TileCoord');
+goog.require('ol.TileState');
 goog.require('ol.layer.TileLayer');
 goog.require('ol.renderer.Map');
 goog.require('ol.renderer.canvas.Layer');
diff --git a/src/ol/renderer/dom/domlayerrenderer.js b/src/ol/renderer/dom/domlayerrenderer.js
index 5a39813363..7b59b1e7be 100644
--- a/src/ol/renderer/dom/domlayerrenderer.js
+++ b/src/ol/renderer/dom/domlayerrenderer.js
@@ -1,6 +1,5 @@
 goog.provide('ol.renderer.dom.Layer');
 
-goog.require('ol.Coordinate');
 goog.require('ol.layer.Layer');
 goog.require('ol.renderer.Layer');
 
diff --git a/src/ol/renderer/dom/dommaprenderer.js b/src/ol/renderer/dom/dommaprenderer.js
index fd6bfc75b8..18700d9b25 100644
--- a/src/ol/renderer/dom/dommaprenderer.js
+++ b/src/ol/renderer/dom/dommaprenderer.js
@@ -4,11 +4,7 @@ goog.require('goog.array');
 goog.require('goog.asserts');
 goog.require('goog.dom');
 goog.require('goog.dom.TagName');
-goog.require('goog.events');
-goog.require('goog.events.Event');
 goog.require('goog.style');
-goog.require('ol.Coordinate');
-goog.require('ol.FrameState');
 goog.require('ol.layer.TileLayer');
 goog.require('ol.renderer.Map');
 goog.require('ol.renderer.dom.TileLayer');
diff --git a/src/ol/renderer/dom/domrenderer.js b/src/ol/renderer/dom/domrenderer.js
index 9577660298..1d32334bfa 100644
--- a/src/ol/renderer/dom/domrenderer.js
+++ b/src/ol/renderer/dom/domrenderer.js
@@ -1,4 +1,4 @@
-goog.provide('ol.renderer.dom');
+goog.provide('ol.renderer.dom.isSupported');
 
 goog.require('goog.functions');
 
diff --git a/src/ol/renderer/dom/domtilelayerrenderer.js b/src/ol/renderer/dom/domtilelayerrenderer.js
index 5a87a865c6..a92d34a0d2 100644
--- a/src/ol/renderer/dom/domtilelayerrenderer.js
+++ b/src/ol/renderer/dom/domtilelayerrenderer.js
@@ -5,17 +5,16 @@ goog.provide('ol.renderer.dom.TileLayer');
 
 goog.require('goog.asserts');
 goog.require('goog.dom');
-goog.require('goog.math.Vec2');
 goog.require('goog.style');
 goog.require('goog.vec.Mat4');
 goog.require('ol.Coordinate');
 goog.require('ol.Extent');
-goog.require('ol.Size');
+goog.require('ol.Tile');
 goog.require('ol.TileCoord');
-goog.require('ol.TileRange');
 goog.require('ol.TileState');
 goog.require('ol.ViewHint');
 goog.require('ol.dom');
+goog.require('ol.layer.TileLayer');
 goog.require('ol.renderer.dom.Layer');
 goog.require('ol.tilegrid.TileGrid');
 
diff --git a/src/ol/renderer/layerrenderer.js b/src/ol/renderer/layerrenderer.js
index e3f2b01635..4ff6f66cab 100644
--- a/src/ol/renderer/layerrenderer.js
+++ b/src/ol/renderer/layerrenderer.js
@@ -8,6 +8,7 @@ goog.require('ol.TileRange');
 goog.require('ol.layer.Layer');
 goog.require('ol.layer.LayerProperty');
 goog.require('ol.layer.LayerState');
+goog.require('ol.source.Source');
 goog.require('ol.source.TileSource');
 
 
diff --git a/src/ol/renderer/maprenderer.js b/src/ol/renderer/maprenderer.js
index fbd45224bf..d3cceb36d1 100644
--- a/src/ol/renderer/maprenderer.js
+++ b/src/ol/renderer/maprenderer.js
@@ -6,9 +6,12 @@ goog.require('goog.asserts');
 goog.require('goog.events');
 goog.require('goog.functions');
 goog.require('goog.vec.Mat4');
+goog.require('ol.CollectionEvent');
+goog.require('ol.CollectionEventType');
 goog.require('ol.FrameState');
-goog.require('ol.View2D');
-goog.require('ol.View2DProperty');
+goog.require('ol.Object');
+goog.require('ol.layer.Layer');
+goog.require('ol.renderer.Layer');
 
 
 
diff --git a/src/ol/renderer/webgl/webglmaprenderer.js b/src/ol/renderer/webgl/webglmaprenderer.js
index 6c657fb0f5..6f754ba7c0 100644
--- a/src/ol/renderer/webgl/webglmaprenderer.js
+++ b/src/ol/renderer/webgl/webglmaprenderer.js
@@ -5,16 +5,15 @@ goog.provide('ol.renderer.webgl.map.shader');
 
 goog.require('goog.array');
 goog.require('goog.debug.Logger');
-goog.require('goog.dispose');
 goog.require('goog.dom');
 goog.require('goog.dom.TagName');
 goog.require('goog.events');
 goog.require('goog.events.Event');
-goog.require('goog.events.EventType');
 goog.require('goog.style');
 goog.require('goog.webgl');
+goog.require('ol.FrameState');
+goog.require('ol.Size');
 goog.require('ol.Tile');
-goog.require('ol.layer.Layer');
 goog.require('ol.layer.TileLayer');
 goog.require('ol.renderer.Map');
 goog.require('ol.renderer.webgl.FragmentShader');
diff --git a/src/ol/renderer/webgl/webglrenderer.js b/src/ol/renderer/webgl/webglrenderer.js
index d7ba243f8f..cf12c2ed7d 100644
--- a/src/ol/renderer/webgl/webglrenderer.js
+++ b/src/ol/renderer/webgl/webglrenderer.js
@@ -1,4 +1,4 @@
-goog.provide('ol.renderer.webgl');
+goog.provide('ol.renderer.webgl.isSupported');
 
 goog.require('ol.webgl');
 
diff --git a/src/ol/renderer/webgl/webgltilelayerrenderer.js b/src/ol/renderer/webgl/webgltilelayerrenderer.js
index fd4e0842e2..3663948de8 100644
--- a/src/ol/renderer/webgl/webgltilelayerrenderer.js
+++ b/src/ol/renderer/webgl/webgltilelayerrenderer.js
@@ -7,16 +7,17 @@ goog.provide('ol.renderer.webgl.tilelayerrenderer.shader.Fragment');
 goog.provide('ol.renderer.webgl.tilelayerrenderer.shader.Vertex');
 
 goog.require('goog.array');
-goog.require('goog.asserts');
-goog.require('goog.events.EventType');
 goog.require('goog.object');
 goog.require('goog.structs.PriorityQueue');
 goog.require('goog.vec.Mat4');
 goog.require('goog.vec.Vec4');
 goog.require('goog.webgl');
-goog.require('ol.Coordinate');
+goog.require('ol.Extent');
 goog.require('ol.FrameState');
 goog.require('ol.Size');
+goog.require('ol.Tile');
+goog.require('ol.TileCoord');
+goog.require('ol.TileRange');
 goog.require('ol.TileState');
 goog.require('ol.layer.TileLayer');
 goog.require('ol.renderer.webgl.FragmentShader');
diff --git a/src/ol/source/bingmapssource.js b/src/ol/source/bingmapssource.js
index ed89f2363c..c2d6e7146f 100644
--- a/src/ol/source/bingmapssource.js
+++ b/src/ol/source/bingmapssource.js
@@ -3,10 +3,14 @@ goog.provide('ol.source.BingMaps');
 
 goog.require('goog.Uri');
 goog.require('goog.array');
-goog.require('goog.events');
-goog.require('goog.events.EventType');
 goog.require('goog.net.Jsonp');
+goog.require('ol.Attribution');
+goog.require('ol.Extent');
+goog.require('ol.Projection');
+goog.require('ol.Size');
+goog.require('ol.TileCoord');
 goog.require('ol.TileRange');
+goog.require('ol.TileUrlFunction');
 goog.require('ol.source.ImageTileSource');
 goog.require('ol.tilegrid.XYZ');
 
diff --git a/src/ol/source/debugtilesource.js b/src/ol/source/debugtilesource.js
index 1cb3e059e7..8cd712d584 100644
--- a/src/ol/source/debugtilesource.js
+++ b/src/ol/source/debugtilesource.js
@@ -4,6 +4,7 @@ goog.require('ol.Size');
 goog.require('ol.Tile');
 goog.require('ol.TileCache');
 goog.require('ol.TileCoord');
+goog.require('ol.TileState');
 goog.require('ol.source.TileSource');
 goog.require('ol.tilegrid.TileGrid');
 
diff --git a/src/ol/source/imagetilesource.js b/src/ol/source/imagetilesource.js
index b025985f00..4a59b1bcff 100644
--- a/src/ol/source/imagetilesource.js
+++ b/src/ol/source/imagetilesource.js
@@ -5,6 +5,7 @@ goog.require('ol.Attribution');
 goog.require('ol.Extent');
 goog.require('ol.ImageTile');
 goog.require('ol.Projection');
+goog.require('ol.Tile');
 goog.require('ol.TileCache');
 goog.require('ol.TileCoord');
 goog.require('ol.TileUrlFunction');
diff --git a/src/ol/source/openstreetmapsource.js b/src/ol/source/openstreetmapsource.js
index 7245827837..8bbfaf5742 100644
--- a/src/ol/source/openstreetmapsource.js
+++ b/src/ol/source/openstreetmapsource.js
@@ -1,5 +1,6 @@
 goog.provide('ol.source.OpenStreetMap');
 
+goog.require('ol.Attribution');
 goog.require('ol.source.XYZ');
 
 
diff --git a/src/ol/source/source.js b/src/ol/source/source.js
index 727c732789..c56ec4d257 100644
--- a/src/ol/source/source.js
+++ b/src/ol/source/source.js
@@ -6,7 +6,6 @@ goog.require('goog.functions');
 goog.require('ol.Attribution');
 goog.require('ol.Extent');
 goog.require('ol.Projection');
-goog.require('ol.TileUrlFunction');
 
 
 /**
diff --git a/src/ol/source/stamensource.js b/src/ol/source/stamensource.js
index 6c68e8e720..46f87d83df 100644
--- a/src/ol/source/stamensource.js
+++ b/src/ol/source/stamensource.js
@@ -4,6 +4,7 @@ goog.provide('ol.source.Stamen');
 goog.provide('ol.source.StamenFlavor');
 goog.provide('ol.source.StamenProvider');
 
+goog.require('ol.Attribution');
 goog.require('ol.source.XYZ');
 
 
diff --git a/src/ol/source/tiledwmssource.js b/src/ol/source/tiledwmssource.js
index 41c5024327..b09147cf2c 100644
--- a/src/ol/source/tiledwmssource.js
+++ b/src/ol/source/tiledwmssource.js
@@ -4,15 +4,13 @@ goog.provide('ol.source.TiledWMS');
 
 
 goog.require('goog.array');
-goog.require('goog.asserts');
 goog.require('goog.object');
 goog.require('goog.uri.utils');
-goog.require('ol.Attribution');
+goog.require('ol.Extent');
 goog.require('ol.Projection');
 goog.require('ol.TileCoord');
 goog.require('ol.TileUrlFunction');
 goog.require('ol.source.ImageTileSource');
-goog.require('ol.tilegrid.TileGrid');
 
 
 
diff --git a/src/ol/source/tilejsonsource.js b/src/ol/source/tilejsonsource.js
index af306b0d26..9721d32035 100644
--- a/src/ol/source/tilejsonsource.js
+++ b/src/ol/source/tilejsonsource.js
@@ -1,6 +1,6 @@
 // FIXME add some error checking
 // FIXME check order of async callbacks
-// FIXME use minzoom when supported by ol.tilegrid.TileGrid
+// FIXME use minzoom when supported
 
 /**
  * @see http://mapbox.com/developers/api/
@@ -10,10 +10,12 @@ goog.provide('ol.source.TileJSON');
 goog.provide('ol.tilejson');
 
 goog.require('goog.asserts');
-goog.require('goog.events.EventType');
 goog.require('goog.net.jsloader');
-goog.require('goog.string');
+goog.require('ol.Attribution');
+goog.require('ol.Extent');
 goog.require('ol.Projection');
+goog.require('ol.TileCoord');
+goog.require('ol.TileRange');
 goog.require('ol.TileUrlFunction');
 goog.require('ol.source.ImageTileSource');
 goog.require('ol.tilegrid.XYZ');
diff --git a/src/ol/source/tilesource.js b/src/ol/source/tilesource.js
index cff0556921..93e083eef8 100644
--- a/src/ol/source/tilesource.js
+++ b/src/ol/source/tilesource.js
@@ -7,8 +7,7 @@ goog.require('ol.Extent');
 goog.require('ol.Projection');
 goog.require('ol.Tile');
 goog.require('ol.TileCoord');
-goog.require('ol.TileUrlFunction');
-goog.require('ol.TileUrlFunctionType');
+goog.require('ol.TileRange');
 goog.require('ol.source.Source');
 goog.require('ol.tilegrid.TileGrid');
 
diff --git a/src/ol/source/xyzsource.js b/src/ol/source/xyzsource.js
index 0758d99f89..ad7842769b 100644
--- a/src/ol/source/xyzsource.js
+++ b/src/ol/source/xyzsource.js
@@ -5,9 +5,8 @@ goog.provide('ol.source.XYZOptions');
 
 goog.require('goog.math');
 goog.require('ol.Attribution');
-goog.require('ol.Coordinate');
+goog.require('ol.Extent');
 goog.require('ol.Projection');
-goog.require('ol.Size');
 goog.require('ol.TileCoord');
 goog.require('ol.TileUrlFunction');
 goog.require('ol.TileUrlFunctionType');
diff --git a/src/ol/tile.js b/src/ol/tile.js
index 180a712065..c9cf6bed73 100644
--- a/src/ol/tile.js
+++ b/src/ol/tile.js
@@ -1,7 +1,6 @@
 goog.provide('ol.Tile');
 goog.provide('ol.TileState');
 
-goog.require('goog.array');
 goog.require('goog.events');
 goog.require('goog.events.EventTarget');
 goog.require('goog.events.EventType');
diff --git a/src/ol/tilecache.js b/src/ol/tilecache.js
index 9645fb9513..2972766682 100644
--- a/src/ol/tilecache.js
+++ b/src/ol/tilecache.js
@@ -1,6 +1,5 @@
 goog.provide('ol.TileCache');
 
-goog.require('goog.dispose');
 goog.require('ol.Tile');
 goog.require('ol.TileRange');
 goog.require('ol.structs.LinkedMap');
diff --git a/src/ol/tilegrid/tilegrid.js b/src/ol/tilegrid/tilegrid.js
index 188692861c..58dfaacfda 100644
--- a/src/ol/tilegrid/tilegrid.js
+++ b/src/ol/tilegrid/tilegrid.js
@@ -7,6 +7,7 @@ goog.require('goog.asserts');
 goog.require('ol.Coordinate');
 goog.require('ol.Extent');
 goog.require('ol.PixelBounds');
+goog.require('ol.Projection');
 goog.require('ol.Size');
 goog.require('ol.TileCoord');
 goog.require('ol.TileRange');
diff --git a/src/ol/view.js b/src/ol/view.js
index f69302fc98..871928073e 100644
--- a/src/ol/view.js
+++ b/src/ol/view.js
@@ -3,8 +3,6 @@ goog.provide('ol.ViewHint');
 
 goog.require('goog.array');
 goog.require('ol.IView');
-goog.require('ol.IView2D');
-goog.require('ol.IView3D');
 goog.require('ol.Object');
 
 
diff --git a/src/ol/view2d.js b/src/ol/view2d.js
index ad4af94932..c1da3c23bc 100644
--- a/src/ol/view2d.js
+++ b/src/ol/view2d.js
@@ -5,12 +5,14 @@ goog.provide('ol.View2D');
 goog.provide('ol.View2DProperty');
 
 goog.require('ol.Constraints');
+goog.require('ol.Coordinate');
 goog.require('ol.Extent');
 goog.require('ol.IView2D');
 goog.require('ol.IView3D');
 goog.require('ol.Projection');
 goog.require('ol.ResolutionConstraint');
 goog.require('ol.RotationConstraint');
+goog.require('ol.Size');
 goog.require('ol.View');
 goog.require('ol.animation');