Add option to configure maxzoom and appropriate documentation

docs/config.rst

@@ -509,6 +509,17 @@ values. The valid configuration keys are listed below.
 
     **Default:** ``1``
 
+``maxzoom``
+    This specifies the maximum zoom allowed by the zoom control on the web page.
+
+    .. note::
+
+            This does not change the number of zoom levels rendered, but allows
+            you to neglect uploading the larger and more detailed zoom levels if bandwidth
+            usage is an issue.
+
+    **Default:** Automatically set to most detailed zoom level
+
 ``base``
     Allows you to specify a remote location for the tile folder, useful if you
     rsync your map's images to a remote server. Leave a trailing slash and point
@@ -516,7 +527,7 @@ values. The valid configuration keys are listed below.
     tiles folder itself. For example, if the tile images start at
     http://domain.com/map/world_day/ you want to set this to http://domain.com/map/
 
-.. _option_texture_pack:
+.. _option_texturepath:
 
 ``texturepath``
     This is a where a specific texture pack can be found to be used during this render.

overviewer.py

@@ -432,7 +432,7 @@ dir but you forgot to put quotes around the directory, since it contains spaces.
 
         # only pass to the TileSet the options it really cares about
         render['name'] = render_name # perhaps a hack. This is stored here for the asset manager
-        tileSetOpts = util.dict_subset(render, ["name", "imgformat", "renderchecks", "rerenderprob", "bgcolor", "defaultzoom", "imgquality", "optimizeimg", "rendermode", "worldname_orig", "title", "dimension", "changelist","showspawn", "overlay","base", "poititle"])
+        tileSetOpts = util.dict_subset(render, ["name", "imgformat", "renderchecks", "rerenderprob", "bgcolor", "defaultzoom", "imgquality", "optimizeimg", "rendermode", "worldname_orig", "title", "dimension", "changelist", "showspawn", "overlay", "base", "poititle", "maxzoom"])
         tileSetOpts.update({"spawn": w.find_true_spawn()}) # TODO find a better way to do this
         tset = tileset.TileSet(w, rset, assetMrg, tex, tileSetOpts, tileset_dir)
         tilesets.append(tset)

overviewer_core/settingsDefinition.py

@@ -85,6 +85,7 @@ renders = Setting(required=True, default=util.OrderedDict(),
             "base": Setting(required=False, validator=validateStr, default=""),
             "poititle": Setting(required=False, validator=validateStr, default="Signs"),
             "customwebassets": Setting(required=False, validator=validateWebAssetsPath, default=None),
+            "maxzoom": Setting(required=False, validator=validateInt, default=None),
             # Remove this eventually (once people update their configs)
             "worldname": Setting(required=False, default=None,
                 validator=error("The option 'worldname' is now called 'world'. Please update your config files")),

overviewer_core/tileset.py

@@ -519,7 +519,7 @@ class TileSet(object):
                 zoomLevels = self.treedepth,
                 minZoom = 0,
                 defaultZoom = self.options.get('defaultzoom'),
-                maxZoom = self.treedepth,
+                maxZoom = self.options.get('maxzoom', self.treedepth),
                 path = self.options.get('name'),
                 base = self.options.get('base'),
                 bgcolor = bgcolorformat(self.options.get('bgcolor')),