diff --git a/code/boot.js b/code/boot.js
index 876a854f..7d5a45ec 100644
--- a/code/boot.js
+++ b/code/boot.js
@@ -192,6 +192,7 @@ window.setupMap = function() {
     'Google Hybrid':  views[4],
     'Google Terrain': views[5]
     }, addLayers);
+
   // Remove the hidden layer after layerChooser built, to avoid messing up ordering of layers 
   $.each(hiddenLayer, function(ind, layer){
     map.removeLayer(layer);
diff --git a/code/map_data.js b/code/map_data.js
index 37729ed1..1e1fb92c 100644
--- a/code/map_data.js
+++ b/code/map_data.js
@@ -14,7 +14,7 @@ window.requestData = function() {
 
   var bounds = clampLatLngBounds(map.getBounds());
 
-  //we query the server as if the zoom level was effectiveZoom
+  //we query the server as if the zoom level was this. it may not match the actual map zoom level
   var z = getPortalDataZoom();
 
   var x1 = lngToTile(bounds.getWest(), z);