diff --git a/code/map_data_calc_tools.js b/code/map_data_calc_tools.js
index 20aaff56..02435ff9 100755
--- a/code/map_data_calc_tools.js
+++ b/code/map_data_calc_tools.js
@@ -12,10 +12,9 @@
 
 window.getMapZoomTileParameters = function(zoom) {
 
-  // known correct as of 2014-08-14
-  ZOOM_TO_TILES_PER_EDGE = [64, 64, 128, 128, 256, 256, 256, 1024, 1024, 1536, 4096, 4096, 6500, 6500, 6500];
-  MAX_TILES_PER_EDGE = 9000;
-  ZOOM_TO_LEVEL = [8, 8, 8, 8, 7, 7, 7, 6, 6, 5, 4, 4, 3, 2, 2, 1, 1];
+  var ZOOM_TO_TILES_PER_EDGE = [64, 64, 128, 128, 256, 256, 256, 1024, 1024, 1536, 4096, 4096, 6500, 6500, 6500];
+  var MAX_TILES_PER_EDGE = 9000;
+  var ZOOM_TO_LEVEL = [8, 8, 8, 8, 7, 7, 7, 6, 6, 5, 4, 4, 3, 2, 2, 1, 1];
 
   // the current API allows the client to request a minimum portal level. the ZOOM_TO_LEVEL list are minimums
   // however, in my view, this can return excessive numbers of portals in many cases. let's try an optional reduction