+location ~* "^/layer/<%= @layer %>/(\d+)/(\d+)/(\d+)\.(png|jpg|jpeg)$" {
+<% if @uses_tiler -%>
+ set $args "";
+ rewrite ^/layer/<%= @layer %>/(\d+)/(\d+)/(\d+)\.jpg /mosaicjson/tiles/WebMercatorQuad/$1/$2/$3@1x?url=<%= URI.encode_www_form_component(@source) %>&pixel_selection=first&tile_format=jpeg break;
+ rewrite ^/layer/<%= @layer %>/(\d+)/(\d+)/(\d+)\.jpeg /mosaicjson/tiles/WebMercatorQuad/$1/$2/$3@1x?url=<%= URI.encode_www_form_component(@source) %>&pixel_selection=first&tile_format=jpeg break;
+ rewrite ^/layer/<%= @layer %>/(\d+)/(\d+)/(\d+)\.png /mosaicjson/tiles/WebMercatorQuad/$1/$2/$3@1x?url=<%= URI.encode_www_form_component(@source) %>&pixel_selection=first&tile_format=png break;
+ proxy_pass http://<%= @site %>_tiler_backend;
+ proxy_set_header Host $host;
+ proxy_set_header Referer $http_referer;
+ proxy_set_header X-Forwarded-For $remote_addr;
+ proxy_set_header X-Forwarded-Proto https;
+ proxy_set_header X-Forwarded-SSL on;
+ proxy_http_version 1.1;
+ proxy_set_header Connection "";
+ proxy_set_header Cache-Control "";
+ proxy_set_header Pragma "";
+ proxy_redirect off;
+ proxy_cache_key "<%= @layer %><%= @revision %> $request_method $1 $2 $3";
+ proxy_cache proxy_cache_zone;
+ proxy_cache_valid 200 204 180d;
+ proxy_cache_use_stale error timeout updating http_502 http_503 http_504;
+ proxy_cache_background_update on;
+ proxy_next_upstream error timeout invalid_header http_500 http_503;
+ proxy_next_upstream_timeout 30s;
+ proxy_next_upstream_tries 3;
+ proxy_intercept_errors on;
+ proxy_ignore_headers "Cache-Control";
+ proxy_ignore_headers "Expires";
+ proxy_hide_header "Cache-Control";
+ proxy_hide_header "Expires";
+ proxy_hide_header "Access-Control-Allow-Origin";
+<% else -%>
+ # Override QUERY_STRING to force mapserver query parameters
+ fastcgi_param QUERY_STRING "map=/srv/imagery/mapserver/layer-<%= @layer %>.map&mode=tile&layers=<%= @layer %>&tilemode=gmap&tile=$2+$3+$1";
+ fastcgi_pass "<%= @site %>_fastcgi";