From 50c371f77bbaa73c7e44b77626a04dbd2c648b98 Mon Sep 17 00:00:00 2001
From: john gravois <jgravois@esri.com>
Date: Fri, 29 Jun 2018 09:57:52 -0700
Subject: [PATCH] continue to catch 404s

---
 modules/renderer/background_source.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/modules/renderer/background_source.js b/modules/renderer/background_source.js
index fb2bd047d..05c27ee48 100644
--- a/modules/renderer/background_source.js
+++ b/modules/renderer/background_source.js
@@ -299,6 +299,11 @@ rendererBackgroundSource.Bing = function(data, dispatch) {
 
 
 rendererBackgroundSource.Esri = function(data) {
+    // in addition to using the tilemap at zoom level 20, overzoom real tiles - #4327 (deprecated technique, but it works)
+    if (data.template.match(/blankTile/) === null) {
+        data.template = data.template + '?blankTile=false';
+    }
+
     var esri = rendererBackgroundSource(data);
     var cache = {};
     var inflight = {};