From 8e27c78d3cb2162d963b49e25519b5d213d74730 Mon Sep 17 00:00:00 2001
From: Tom Hughes <tom@compton.nu>
Date: Fri, 23 Nov 2012 19:00:51 +0000
Subject: [PATCH 1/1] Fall back to the mapnik layer

If there are no known layers in the layers string, then fall back to
showing the standard mapnik layer.
---
 app/assets/javascripts/map.js.erb | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/app/assets/javascripts/map.js.erb b/app/assets/javascripts/map.js.erb
index 393e9cae7..9df9ca2d9 100644
--- a/app/assets/javascripts/map.js.erb
+++ b/app/assets/javascripts/map.js.erb
@@ -184,11 +184,16 @@ function getMapLayers() {
 }
 
 function setMapLayers(layerConfig) {
+  var foundLayer = false;
   for (var i = 0; i < layers.length; i++) {
     if (layerConfig.indexOf(layers[i].layerCode) >= 0) {
       map.addLayer(layers[i].layer);
+      foundLayer = true;
     } else {
       map.removeLayer(layers[i].layer);
     }
   }
+  if (!foundLayer) {
+    map.addLayer(layers[0].layer);
+  }
 }
-- 
2.43.2