diff --git a/overviewer.py b/overviewer.py
index 9e9f66a..be41d5a 100755
--- a/overviewer.py
+++ b/overviewer.py
@@ -296,7 +296,7 @@ dir but you forgot to put quotes around the directory, since it contains spaces.
             os.mkdir(tileset_dir)
 
         # only pass to the TileSet the options it really cares about
-        tileSetOpts = util.dict_subset(render, ["name", "imgformat", "renderchecks", "rerenderprob", "bgcolor", "imgquality", "optimizeimg", "rendermode"])
+        tileSetOpts = util.dict_subset(render, ["name", "imgformat", "renderchecks", "rerenderprob", "bgcolor", "imgquality", "optimizeimg", "rendermode", "worldname_orig", "title"])
         tset = tileset.TileSet(rset, assetMrg, tex, tileSetOpts, tileset_dir)
         tilesets.append(tset)
 
diff --git a/overviewer_core/assetmanager.py b/overviewer_core/assetmanager.py
index 3958c48..f1df37a 100644
--- a/overviewer_core/assetmanager.py
+++ b/overviewer_core/assetmanager.py
@@ -67,7 +67,6 @@ directory.
         # TODO based on the type, so something
         POI[regionset.name].append
 
-
     def finalize(self, tilesets):
 
         # dictionary to hold the overviewerConfig.js settings that we will dumps
@@ -108,27 +107,13 @@ directory.
 
         dump['tilesets'] = []
 
-        def bgcolorformat(color):
-            return "#%02x%02x%02x" % color[0:3]
 
         for tileset in tilesets:
-            js_tileset = dict()
-            js_tileset['name'] = tileset.options.get('title')
-            js_tileset['zoomLevels'] = tileset.treedepth
-            js_tileset['minZoom'] = 0
-            js_tileset['defaultZoom'] = 1
-            js_tileset['maxZoom'] = tileset.treedepth
-            js_tileset['path'] = tileset.options.get('name')
-            js_tileset['base'] = ''
-            js_tileset['bgcolor'] = bgcolorformat(tileset.options.get('bgcolor'))
-            js_tileset['world'] = tileset.options.get('worldname_orig')
-            js_tileset['last_rendertime'] = tileset.this_rendertime
-            js_tileset['north_direction'] = 'upper-left'
-            dump['tilesets'].append(js_tileset)
+            dump['tilesets'].append(tileset.get_persistent_data())
 
             # write a blank image
             blank = Image.new("RGBA", (1,1), tileset.options.get('bgcolor'))
-            blank.save(os.path.join(self.outputdir, tileset.options.get('name'), "blank."+tileset.options.get('imgformat')))
+            blank.save(os.path.join(self.outputdir, tileset.options.get('name'), "blank." + tileset.options.get('imgformat')))
 
 
         jsondump = json.dumps(dump, indent=4)
diff --git a/overviewer_core/tileset.py b/overviewer_core/tileset.py
index 57724e6..6f7d6c8 100644
--- a/overviewer_core/tileset.py
+++ b/overviewer_core/tileset.py
@@ -380,7 +380,22 @@ class TileSet(object):
         TileSet. Typically this is called by AssetManager
 
         """
-        return None
+        def bgcolorformat(color):
+            return "#%02x%02x%02x" % color[0:3]
+        d = dict(name = self.options.get('title'),
+                zoomLevels = self.treedepth,
+                minZoom = 0,
+                defaultZoom = 1,
+                maxZoom = self.treedepth,
+                path = self.options.get('name'),
+                base = '',
+                bgcolor = bgcolorformat(self.options.get('bgcolor')),
+                world = self.options.get('worldname_orig'),
+                last_rendertime = self.this_rendertime,
+                north_direction = 'upper-left')
+        print "get_persistent_data: %r" % d
+        return d
+
 
     def _find_chunk_range(self):
         """Finds the chunk range in rows/columns and stores them in
@@ -1301,6 +1316,7 @@ class RenderTile(object):
         imgpath = ".".join((path, imgformat))
         return imgpath
 
+
     @classmethod
     def from_path(cls, path):
         """Constructor that takes a path and computes the col,row address of