diff --git a/config/environments/development.js.example b/config/environments/development.js.example
index 22a66806..376f2a5a 100644
--- a/config/environments/development.js.example
+++ b/config/environments/development.js.example
@@ -63,6 +63,7 @@ var config = {
         */
         row_limit: 65535,
         simplify_geometries: true,
+        use_overviews: true, // use overviews to retrieve raster
         /*
          * Set persist_connection to false if you want
          * database connections to be closed on renderer
diff --git a/config/environments/production.js.example b/config/environments/production.js.example
index 2a47ea5b..08b96202 100644
--- a/config/environments/production.js.example
+++ b/config/environments/production.js.example
@@ -65,6 +65,7 @@ var config = {
          */
         persist_connection: false,
         simplify_geometries: true,
+        use_overviews: true, // use overviews to retrieve raster
         max_size: 500
     }
     ,mapnik_version: undefined
diff --git a/config/environments/staging.js.example b/config/environments/staging.js.example
index 446d5c2f..c8bcb5b4 100644
--- a/config/environments/staging.js.example
+++ b/config/environments/staging.js.example
@@ -57,6 +57,7 @@ var config = {
         extent: "-20037508.3,-20037508.3,20037508.3,20037508.3",
         row_limit: 65535,
         simplify_geometries: true,
+        use_overviews: true, // use overviews to retrieve raster
         /*
          * Set persist_connection to false if you want
          * database connections to be closed on renderer
diff --git a/config/environments/test.js.example b/config/environments/test.js.example
index 9fa7aca8..9d6fb502 100644
--- a/config/environments/test.js.example
+++ b/config/environments/test.js.example
@@ -57,6 +57,7 @@ var config = {
         extent: "-20037508.3,-20037508.3,20037508.3,20037508.3",
         row_limit: 65535,
         simplify_geometries: true,
+        use_overviews: true, // use overviews to retrieve raster
         /*
          * Set persist_connection to false if you want
          * database connections to be closed on renderer