From 3cbf3739c0dd1937a4239a87cfbe2aac92a70a3f Mon Sep 17 00:00:00 2001
From: Tom MacWright <tom@macwright.org>
Date: Wed, 12 Dec 2012 16:32:40 -0500
Subject: [PATCH] Restrict zoom to scaleExtent

---
 js/id/renderer/map.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/js/id/renderer/map.js b/js/id/renderer/map.js
index 846849844..bfbd1efab 100644
--- a/js/id/renderer/map.js
+++ b/js/id/renderer/map.js
@@ -365,6 +365,7 @@ iD.Map = function() {
         var scale = 256 * Math.pow(2, z),
             center = pxCenter(),
             l = pointLocation(center);
+        scale = Math.max(1024, Math.min(256 * Math.pow(2, 24), scale));
         projection.scale(scale);
         zoom.scale(projection.scale());
         var t = projection.translate();