diff --git a/js/id/renderer/background.js b/js/id/renderer/background.js
index cb8136214..a2621eca3 100644
--- a/js/id/renderer/background.js
+++ b/js/id/renderer/background.js
@@ -30,8 +30,8 @@ iD.Background = function() {
                 Math.round((d[0] * ts) - tile_origin[0]) + ',' +
                 Math.round((d[1] * ts) - tile_origin[1]) + ')';
         })
-        .attr("width", ts)
-        .attr("height", ts);
+        .attr("width", Math.ceil(ts))
+        .attr("height", Math.ceil(ts));
     }
 
     background.projection = function(_) {
diff --git a/js/id/renderer/map.js b/js/id/renderer/map.js
index bfd11d1ac..4c9238125 100644
--- a/js/id/renderer/map.js
+++ b/js/id/renderer/map.js
@@ -10,7 +10,7 @@ iD.Map = function() {
         zoom = d3.behavior.zoom()
             .translate(projection.translate())
             .scale(projection.scale())
-            .scaleExtent([256, 256 * Math.pow(2, 20)])
+            .scaleExtent([1024, 256 * Math.pow(2, 20)])
             .on('zoom', zoomPan),
         only,
         dblclickEnabled = true,