X-Git-Url: https://git.openstreetmap.org./chef.git/blobdiff_plain/1a4d5ffc47ba7efe859b6c867c136347f7bb36af..b755d11d4c83d4ccc49845e4d8b2b5c7181b27f4:/cookbooks/imagery/recipes/gb_os_sv.rb?ds=sidebyside

diff --git a/cookbooks/imagery/recipes/gb_os_sv.rb b/cookbooks/imagery/recipes/gb_os_sv.rb
index 63056aa3e..2345cc1e8 100644
--- a/cookbooks/imagery/recipes/gb_os_sv.rb
+++ b/cookbooks/imagery/recipes/gb_os_sv.rb
@@ -1,15 +1,14 @@
-# coding: utf-8
 #
-# Cookbook Name:: imagery
+# Cookbook:: imagery
 # Recipe:: gb_os_sv
 #
-# Copyright 2016, OpenStreetMap Foundation
+# Copyright:: 2016, OpenStreetMap Foundation
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
-#     http://www.apache.org/licenses/LICENSE-2.0
+#     https://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
@@ -27,6 +26,13 @@ cookbook_file "/srv/imagery/common/ossv-palette.txt" do
   mode "0644"
 end
 
+cookbook_file "/srv/imagery/common/os-openmap-local-palette.txt" do
+  source "os-openmap-local-palette.txt"
+  owner "root"
+  group "root"
+  mode "0644"
+end
+
 cookbook_file "/srv/imagery/common/osstvw_process" do
   source "osstvw_process"
   owner "root"
@@ -43,7 +49,7 @@ end
 
 imagery_site "os.openstreetmap.org" do
   title "OpenStreetMap - Ordnance Survey OpenData - Street View"
-  aliases ["os.openstreetmap.org.uk"]
+  aliases ["os.osm.org", "os.openstreetmap.org.uk"]
   bbox [[49.85, -10.5], [58.75, 1.9]]
 end
 
@@ -51,7 +57,7 @@ imagery_layer "gb_os_sv_2010_04" do
   site "os.openstreetmap.org"
   title "April 2010"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-2010-04-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-2010-04-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2010" # FIXME: Correct Copyright?
   background_colour "230 246 255" # OSSV Water Blue
   extension "os_sv_png"
@@ -62,7 +68,7 @@ imagery_layer "gb_os_sv_2010_11" do
   site "os.openstreetmap.org"
   title "November 2010"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-2010-11-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-2010-11-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2010" # FIXME: Correct Copyright?
   background_colour "230 246 255" # OSSV Water Blue
   extension "os_sv_png"
@@ -73,7 +79,7 @@ imagery_layer "gb_os_sv_2011_05" do
   site "os.openstreetmap.org"
   title "May 2011"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-2011-05-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-2011-05-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2011" # FIXME: Correct Copyright?
   background_colour "230 246 255" # OSSV Water Blue
   extension "os_sv_png"
@@ -84,7 +90,7 @@ imagery_layer "gb_os_sv_2011_11" do
   site "os.openstreetmap.org"
   title "November 2011"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-2011-11-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-2011-11-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2011" # FIXME: Correct Copyright?
   background_colour "230 246 255" # OSSV Water Blue
   extension "os_sv_png"
@@ -95,7 +101,7 @@ imagery_layer "gb_os_sv_2012_05" do
   site "os.openstreetmap.org"
   title "May 2012"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-2012-05-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-2012-05-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2012"
   background_colour "230 246 255" # OSSV Water Blue
   extension "os_sv_png"
@@ -106,7 +112,7 @@ imagery_layer "gb_os_sv_2012_11" do
   site "os.openstreetmap.org"
   title "November 2012"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-2012-11-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-2012-11-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2012"
   background_colour "230 246 255" # OSSV Water Blue
   extension "os_sv_png"
@@ -117,7 +123,7 @@ imagery_layer "gb_os_sv_2013_05" do
   site "os.openstreetmap.org"
   title "May 2013"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-2013-05-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-2013-05-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2013"
   background_colour "230 246 255" # OSSV Water Blue
   extension "os_sv_png"
@@ -128,7 +134,7 @@ imagery_layer "gb_os_sv_2013_11" do
   site "os.openstreetmap.org"
   title "November 2013"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-2013-11-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-2013-11-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2013"
   background_colour "230 246 255" # OSSV Water Blue
   extension "os_sv_png"
@@ -139,7 +145,7 @@ imagery_layer "gb_os_sv_2014_04" do
   site "os.openstreetmap.org"
   title "April 2014"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-2014-04-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-2014-04-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
   background_colour "230 246 255" # OSSV Water Blue
   extension "os_sv_png"
@@ -150,7 +156,7 @@ imagery_layer "gb_os_sv_2014_10" do
   site "os.openstreetmap.org"
   title "October 2014"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-2014-10-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-2014-10-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
   background_colour "230 246 255" # OSSV Water Blue
   extension "os_sv_png"
@@ -161,7 +167,7 @@ imagery_layer "gb_os_sv_2015_05" do
   site "os.openstreetmap.org"
   title "May 2015"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-2015-05-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-2015-05-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
   background_colour "230 246 255" # OSSV Water Blue
   extension "os_sv_png"
@@ -172,7 +178,7 @@ imagery_layer "gb_os_sv_2015_11" do
   site "os.openstreetmap.org"
   title "November 2015"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-2015-11-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-2015-11-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
   background_colour "230 246 255" # OSSV Water Blue
   extension "os_sv_png"
@@ -182,20 +188,21 @@ end
 imagery_layer "gb_os_sv_2016_04" do
   site "os.openstreetmap.org"
   title "April 2016"
-  default_layer true
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-2016-04-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-2016-04-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2016"
   background_colour "230 246 255" # OSSV Water Blue
   extension "os_sv_png"
-  url_aliases ["/sv-2016-04", "/sv"] # Add "/sv" to current edition for backward compatibility
+  url_aliases ["/sv-2016-04"]
 end
 
-# Diff layers
+# ======= Diff layers =======
+
 imagery_layer "gb_os_sv_diff_2010_04_2010_11" do
   site "os.openstreetmap.org"
+  title "Changes April 2010 to November 2010"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-diff-2010-04-2010-11-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-diff-2010-04-2010-11-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2010"
   extension "os_sv_diff_png"
   url_aliases ["/sv-diff-2010-04-2010-11"]
@@ -204,8 +211,9 @@ end
 
 imagery_layer "gb_os_sv_diff_2010_04_2011_05" do
   site "os.openstreetmap.org"
+  title "Changes April 2010 to May 2011"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-diff-2010-04-2011-05-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-diff-2010-04-2011-05-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2011"
   extension "os_sv_diff_png"
   url_aliases ["/sv-diff-2010-04-2011-05"]
@@ -214,8 +222,9 @@ end
 
 imagery_layer "gb_os_sv_diff_2010_04_2011_11" do
   site "os.openstreetmap.org"
+  title "Changes April 2010 to November 2011"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-diff-2010-04-2011-11-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-diff-2010-04-2011-11-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2011"
   extension "os_sv_diff_png"
   url_aliases ["/sv-diff-2010-04-2011-11"]
@@ -224,8 +233,9 @@ end
 
 imagery_layer "gb_os_sv_diff_2010_04_2012_05" do
   site "os.openstreetmap.org"
+  title "Changes April 2010 to May 2012"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-diff-2010-04-2012-05-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-diff-2010-04-2012-05-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2012"
   extension "os_sv_diff_png"
   url_aliases ["/sv-diff-2010-04-2012-05"]
@@ -234,8 +244,9 @@ end
 
 imagery_layer "gb_os_sv_diff_2010_04_2012_11" do
   site "os.openstreetmap.org"
+  title "Changes April 2010 to November 2012"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-diff-2010-04-2012-11-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-diff-2010-04-2012-11-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2012"
   extension "os_sv_diff_png"
   url_aliases ["/sv-diff-2010-04-2012-11"]
@@ -244,8 +255,9 @@ end
 
 imagery_layer "gb_os_sv_diff_2010_04_2013_05" do
   site "os.openstreetmap.org"
+  title "Changes April 2010 to May 2013"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-diff-2010-04-2013-05-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-diff-2010-04-2013-05-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2013"
   extension "os_sv_diff_png"
   url_aliases ["/sv-diff-2010-04-2013-05"]
@@ -254,8 +266,9 @@ end
 
 imagery_layer "gb_os_sv_diff_2010_04_2013_11" do
   site "os.openstreetmap.org"
+  title "Changes April 2010 to November 2013"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-diff-2010-04-2013-11-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-diff-2010-04-2013-11-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2013"
   extension "os_sv_diff_png"
   url_aliases ["/sv-diff-2010-04-2013-11"]
@@ -264,8 +277,9 @@ end
 
 imagery_layer "gb_os_sv_diff_2010_04_2014_04" do
   site "os.openstreetmap.org"
+  title "Changes April 2010 to April 2014"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-diff-2010-04-2014-04-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-diff-2010-04-2014-04-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
   extension "os_sv_diff_png"
   url_aliases ["/sv-diff-2010-04-2014-04"]
@@ -274,8 +288,9 @@ end
 
 imagery_layer "gb_os_sv_diff_2010_04_2014_10" do
   site "os.openstreetmap.org"
+  title "Changes April 2010 to October 2014"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-diff-2010-04-2014-10-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-diff-2010-04-2014-10-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
   extension "os_sv_diff_png"
   url_aliases ["/sv-diff-2010-04-2014-10"]
@@ -284,8 +299,9 @@ end
 
 imagery_layer "gb_os_sv_diff_2010_04_2015_05" do
   site "os.openstreetmap.org"
+  title "Changes April 2010 to May 2015"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-diff-2010-04-2015-05-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-diff-2010-04-2015-05-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
   extension "os_sv_diff_png"
   url_aliases ["/sv-diff-2010-04-2015-05"]
@@ -294,8 +310,9 @@ end
 
 imagery_layer "gb_os_sv_diff_2010_04_2015_11" do
   site "os.openstreetmap.org"
+  title "Changes April 2010 to November 2015"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-diff-2010-04-2015-11-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-diff-2010-04-2015-11-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
   extension "os_sv_diff_png"
   url_aliases ["/sv-diff-2010-04-2015-11"]
@@ -304,41 +321,42 @@ end
 
 imagery_layer "gb_os_sv_diff_2010_04_2016_04" do
   site "os.openstreetmap.org"
+  title "Changes April 2010 to April 2016"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-diff-2010-04-2016-04-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-diff-2010-04-2016-04-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2016"
   extension "os_sv_diff_png"
   url_aliases ["/sv-diff-2010-04-2016-04"]
   overlay true
-  revision 2
 end
 
 imagery_layer "gb_os_sv_diff_2010_11_2011_05" do
   site "os.openstreetmap.org"
+  title "Changes November 2010 to May 2011"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-diff-2010-11-2011-05-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-diff-2010-11-2011-05-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2011"
   extension "os_sv_diff_png"
   url_aliases ["/sv-diff-2010-11-2011-05"]
   overlay true
-  revision 2
 end
 
 imagery_layer "gb_os_sv_diff_2010_11_2011_11" do
   site "os.openstreetmap.org"
+  title "Changes November 2010 to November 2011"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-diff-2010-11-2011-11-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-diff-2010-11-2011-11-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2011"
   extension "os_sv_diff_png"
   url_aliases ["/sv-diff-2010-11-2011-11"]
   overlay true
-  revision 2
 end
 
 imagery_layer "gb_os_sv_diff_2010_11_2012_05" do
   site "os.openstreetmap.org"
+  title "Changes November 2010 to May 2012"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-diff-2010-11-2012-05-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-diff-2010-11-2012-05-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2012"
   extension "os_sv_diff_png"
   url_aliases ["/sv-diff-2010-11-2012-05"]
@@ -347,8 +365,9 @@ end
 
 imagery_layer "gb_os_sv_diff_2010_11_2012_11" do
   site "os.openstreetmap.org"
+  title "Changes November 2010 to November 2012"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-diff-2010-11-2012-11-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-diff-2010-11-2012-11-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2012"
   extension "os_sv_diff_png"
   url_aliases ["/sv-diff-2010-11-2012-11"]
@@ -357,8 +376,9 @@ end
 
 imagery_layer "gb_os_sv_diff_2010_11_2013_05" do
   site "os.openstreetmap.org"
+  title "Changes November 2010 to May 2013"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-diff-2010-11-2013-05-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-diff-2010-11-2013-05-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2013"
   extension "os_sv_diff_png"
   url_aliases ["/sv-diff-2010-11-2013-05"]
@@ -367,611 +387,834 @@ end
 
 imagery_layer "gb_os_sv_diff_2010_11_2013_11" do
   site "os.openstreetmap.org"
+  title "Changes November 2010 to November 2013"
   projection "EPSG:27700"
-  source "/data/imagery/gb/os-sv/ossv-diff-2010-11-2013-11-combined.vrt"
+  source "/store/imagery/gb/os-sv/ossv-diff-2010-11-2013-11-combined.vrt"
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2013"
   extension "os_sv_diff_png"
   url_aliases ["/sv-diff-2010-11-2013-11"]
   overlay true
 end
 
-# imagery_layer "gb_os_sv_diff_2010_11_2014_04" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2010-11-2014-04-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2010-11-2014-04"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2010_11_2014_10" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2010-11-2014-10-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2010-11-2014-10"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2010_11_2015_05" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2010-11-2015-05-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2010-11-2015-05"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2010_11_2015_11" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2010-11-2015-11-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2010-11-2015-11"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2010_11_2016_04" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2010-11-2016-04-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2016"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2010-11-2016-04"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2011_05_2011_11" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2011-05-2011-11-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2011"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2011-05-2011-11"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2011_05_2012_05" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2011-05-2012-05-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2012"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2011-05-2012-05"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2011_05_2012_11" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2011-05-2012-11-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2012"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2011-05-2012-11"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2011_05_2013_05" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2011-05-2013-05-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2013"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2011-05-2013-05"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2011_05_2013_11" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2011-05-2013-11-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2013"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2011-05-2013-11"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2011_05_2014_04" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2011-05-2014-04-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2011-05-2014-04"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2011_05_2014_10" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2011-05-2014-10-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2011-05-2014-10"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2011_05_2015_05" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2011-05-2015-05-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2011-05-2015-05"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2011_05_2015_11" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2011-05-2015-11-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2011-05-2015-11"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2011_05_2016_04" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2011-05-2016-04-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2016"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2011-05-2016-04"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2011_11_2012_05" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2011-11-2012-05-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2012"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2011-11-2012-05"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2011_11_2012_11" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2011-11-2012-11-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2012"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2011-11-2012-11"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2011_11_2013_05" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2011-11-2013-05-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2013"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2011-11-2013-05"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2011_11_2013_11" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2011-11-2013-11-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2013"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2011-11-2013-11"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2011_11_2014_04" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2011-11-2014-04-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2011-11-2014-04"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2011_11_2014_10" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2011-11-2014-10-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2011"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2011-11-2014-10"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2011_11_2015_05" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2011-11-2015-05-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2011-11-2015-05"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2011_11_2015_11" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2011-11-2015-11-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2011-11-2015-11"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2011_11_2016_04" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2011-11-2016-04-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2016"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2011-11-2016-04"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2012_05_2012_11" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2012-05-2012-11-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2012"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2012-05-2012-11"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2012_05_2013_05" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2012-05-2013-05-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2013"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2012-05-2013-05"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2012_05_2013_11" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2012-05-2013-11-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2013"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2012-05-2013-11"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2012_05_2014_04" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2012-05-2014-04-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2012-05-2014-04"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2012_05_2014_10" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2012-05-2014-10-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2012-05-2014-10"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2012_05_2015_05" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2012-05-2015-05-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2012-05-2015-05"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2012_05_2015_11" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2012-05-2015-11-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2012-05-2015-11"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2012_05_2016_04" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2012-05-2016-04-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2016"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2012-05-2016-04"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2012_11_2013_05" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2012-11-2013-05-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2013"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2012-11-2013-05"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2012_11_2013_11" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2012-11-2013-11-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2013"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2012-11-2013-11"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2012_11_2014_04" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2012-11-2014-04-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2012-11-2014-04"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2012_11_2014_10" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2012-11-2014-10-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2012-11-2014-10"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2012_11_2015_05" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2012-11-2015-05-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2012-11-2015-05"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2012_11_2015_11" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2012-11-2015-11-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2012-11-2015-11"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2012_11_2016_04" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2012-11-2016-04-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2016"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2012-11-2016-04"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2013_05_2013_11" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2013-05-2013-11-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2013"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2013-05-2013-11"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2013_05_2014_04" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2013-05-2014-04-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2013-05-2014-04"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2013_05_2014_10" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2013-05-2014-10-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2013-05-2014-10"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2013_05_2015_05" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2013-05-2015-05-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2013-05-2015-05"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2013_05_2015_11" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2013-05-2015-11-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2013-05-2015-11"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2013_05_2016_04" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2013-05-2016-04-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2016"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2013-05-2016-04"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2013_11_2014_04" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2013-11-2014-04-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2013-11-2014-04"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2013_11_2014_10" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2013-11-2014-10-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2013-11-2014-10"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2013_11_2015_05" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2013-11-2015-05-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2013-11-2015-05"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2013_11_2015_11" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2013-11-2015-11-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2013-11-2015-11"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2013_11_2016_04" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2013-11-2016-04-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2016"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2013-11-2016-04"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2014_04_2014_10" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2014-04-2014-10-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2014-04-2014-10"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2014_04_2015_05" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2014-04-2015-05-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2014-04-2015-05"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2014_04_2015_11" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2014-04-2015-11-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2014-04-2015-11"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2014_04_2016_04" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2014-04-2016-04-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2016"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2014-04-2016-04"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2014_10_2015_05" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2014-10-2015-05-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2014-10-2015-05"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2014_10_2015_11" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2014-10-2015-11-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2014-10-2015-11"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2014_10_2016_04" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2014-10-2016-04-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2016"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2014-10-2016-04"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2015_05_2015_11" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2015-05-2015-11-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2015-05-2015-11"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2015_05_2016_04" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2015-05-2016-04-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2016"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2015-05-2016-04"]
-#   overlay true
-# end
-#
-# imagery_layer "gb_os_sv_diff_2015_11_2016_04" do
-#   site "os.openstreetmap.org"
-#   projection "EPSG:27700"
-#   source "/data/imagery/gb/os-sv/ossv-diff-2015-11-2016-04-combined.vrt"
-#   copyright "Contains Ordnance Survey data © Crown copyright and database right 2016"
-#   extension "os_sv_diff_png"
-#   url_aliases ["/sv-diff-2015-11-2016-04"]
-#   overlay true
-# end
-#
+imagery_layer "gb_os_sv_diff_2010_11_2014_04" do
+  site "os.openstreetmap.org"
+  title "Changes November 2010 to April 2014"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2010-11-2014-04-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2010-11-2014-04"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2010_11_2014_10" do
+  site "os.openstreetmap.org"
+  title "Changes November 2010 to October 2014"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2010-11-2014-10-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2010-11-2014-10"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2010_11_2015_05" do
+  site "os.openstreetmap.org"
+  title "Changes November 2010 to May 2015"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2010-11-2015-05-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2010-11-2015-05"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2010_11_2015_11" do
+  site "os.openstreetmap.org"
+  title "Changes November 2010 to November 2015"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2010-11-2015-11-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2010-11-2015-11"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2010_11_2016_04" do
+  site "os.openstreetmap.org"
+  title "Changes November 2010 to April 2016"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2010-11-2016-04-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2016"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2010-11-2016-04"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2011_05_2011_11" do
+  site "os.openstreetmap.org"
+  title "Changes May 2011 to November 2011"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2011-05-2011-11-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2011"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2011-05-2011-11"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2011_05_2012_05" do
+  site "os.openstreetmap.org"
+  title "Changes May 2011 to May 2012"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2011-05-2012-05-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2012"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2011-05-2012-05"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2011_05_2012_11" do
+  site "os.openstreetmap.org"
+  title "Changes May 2011 to November 2012"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2011-05-2012-11-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2012"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2011-05-2012-11"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2011_05_2013_05" do
+  site "os.openstreetmap.org"
+  title "Changes May 2011 to May 2013"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2011-05-2013-05-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2013"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2011-05-2013-05"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2011_05_2013_11" do
+  site "os.openstreetmap.org"
+  title "Changes May 2011 to November 2013"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2011-05-2013-11-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2013"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2011-05-2013-11"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2011_05_2014_04" do
+  site "os.openstreetmap.org"
+  title "Changes May 2011 to April 2014"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2011-05-2014-04-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2011-05-2014-04"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2011_05_2014_10" do
+  site "os.openstreetmap.org"
+  title "Changes May 2011 to October 2014"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2011-05-2014-10-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2011-05-2014-10"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2011_05_2015_05" do
+  site "os.openstreetmap.org"
+  title "Changes May 2011 to May 2015"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2011-05-2015-05-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2011-05-2015-05"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2011_05_2015_11" do
+  site "os.openstreetmap.org"
+  title "Changes May 2011 to November 2015"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2011-05-2015-11-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2011-05-2015-11"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2011_05_2016_04" do
+  site "os.openstreetmap.org"
+  title "Changes May 2011 to April 2016"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2011-05-2016-04-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2016"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2011-05-2016-04"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2011_11_2012_05" do
+  site "os.openstreetmap.org"
+  title "Changes November 2011 to May 2012"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2011-11-2012-05-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2012"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2011-11-2012-05"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2011_11_2012_11" do
+  site "os.openstreetmap.org"
+  title "Changes November 2011 to November 2012"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2011-11-2012-11-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2012"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2011-11-2012-11"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2011_11_2013_05" do
+  site "os.openstreetmap.org"
+  title "Changes November 2011 to May 2013"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2011-11-2013-05-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2013"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2011-11-2013-05"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2011_11_2013_11" do
+  site "os.openstreetmap.org"
+  title "Changes November 2011 to November 2013"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2011-11-2013-11-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2013"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2011-11-2013-11"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2011_11_2014_04" do
+  site "os.openstreetmap.org"
+  title "Changes November 2011 to April 2014"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2011-11-2014-04-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2011-11-2014-04"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2011_11_2014_10" do
+  site "os.openstreetmap.org"
+  title "Changes November 2011 to October 2014"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2011-11-2014-10-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2011"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2011-11-2014-10"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2011_11_2015_05" do
+  site "os.openstreetmap.org"
+  title "Changes November 2011 to May 2015"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2011-11-2015-05-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2011-11-2015-05"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2011_11_2015_11" do
+  site "os.openstreetmap.org"
+  title "Changes November 2011 to November 2015"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2011-11-2015-11-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2011-11-2015-11"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2011_11_2016_04" do
+  site "os.openstreetmap.org"
+  title "Changes November 2011 to April 2016"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2011-11-2016-04-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2016"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2011-11-2016-04"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2012_05_2012_11" do
+  site "os.openstreetmap.org"
+  title "Changes May 2012 to November 2012"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2012-05-2012-11-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2012"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2012-05-2012-11"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2012_05_2013_05" do
+  site "os.openstreetmap.org"
+  title "Changes May 2012 to May 2013"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2012-05-2013-05-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2013"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2012-05-2013-05"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2012_05_2013_11" do
+  site "os.openstreetmap.org"
+  title "Changes May 2012 to November 2013"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2012-05-2013-11-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2013"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2012-05-2013-11"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2012_05_2014_04" do
+  site "os.openstreetmap.org"
+  title "Changes May 2012 to April 2014"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2012-05-2014-04-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2012-05-2014-04"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2012_05_2014_10" do
+  site "os.openstreetmap.org"
+  title "Changes May 2012 to October 2014"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2012-05-2014-10-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2012-05-2014-10"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2012_05_2015_05" do
+  site "os.openstreetmap.org"
+  title "Changes May 2012 to May 2015"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2012-05-2015-05-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2012-05-2015-05"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2012_05_2015_11" do
+  site "os.openstreetmap.org"
+  title "Changes May 2012 to November 2015"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2012-05-2015-11-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2012-05-2015-11"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2012_05_2016_04" do
+  site "os.openstreetmap.org"
+  title "Changes May 2012 to April 2016"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2012-05-2016-04-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2016"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2012-05-2016-04"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2012_11_2013_05" do
+  site "os.openstreetmap.org"
+  title "Changes November 2012 to May 2013"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2012-11-2013-05-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2013"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2012-11-2013-05"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2012_11_2013_11" do
+  site "os.openstreetmap.org"
+  title "Changes November 2012 to November 2013"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2012-11-2013-11-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2013"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2012-11-2013-11"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2012_11_2014_04" do
+  site "os.openstreetmap.org"
+  title "Changes November 2012 to April 2014"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2012-11-2014-04-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2012-11-2014-04"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2012_11_2014_10" do
+  site "os.openstreetmap.org"
+  title "Changes November 2012 to October 2014"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2012-11-2014-10-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2012-11-2014-10"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2012_11_2015_05" do
+  site "os.openstreetmap.org"
+  title "Changes November 2012 to May 2015"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2012-11-2015-05-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2012-11-2015-05"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2012_11_2015_11" do
+  site "os.openstreetmap.org"
+  title "Changes November 2012 to November 2015"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2012-11-2015-11-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2012-11-2015-11"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2012_11_2016_04" do
+  site "os.openstreetmap.org"
+  title "Changes November 2012 to April 2016"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2012-11-2016-04-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2016"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2012-11-2016-04"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2013_05_2013_11" do
+  site "os.openstreetmap.org"
+  title "Changes May 2013 to November 2013"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2013-05-2013-11-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2013"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2013-05-2013-11"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2013_05_2014_04" do
+  site "os.openstreetmap.org"
+  title "Changes May 2013 to April 2014"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2013-05-2014-04-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2013-05-2014-04"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2013_05_2014_10" do
+  site "os.openstreetmap.org"
+  title "Changes May 2013 to October 2014"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2013-05-2014-10-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2013-05-2014-10"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2013_05_2015_05" do
+  site "os.openstreetmap.org"
+  title "Changes May 2013 to May 2015"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2013-05-2015-05-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2013-05-2015-05"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2013_05_2015_11" do
+  site "os.openstreetmap.org"
+  title "Changes May 2013 to November 2015"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2013-05-2015-11-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2013-05-2015-11"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2013_05_2016_04" do
+  site "os.openstreetmap.org"
+  title "Changes May 2013 to April 2016"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2013-05-2016-04-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2016"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2013-05-2016-04"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2013_11_2014_04" do
+  site "os.openstreetmap.org"
+  title "Changes November 2013 to April 2014"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2013-11-2014-04-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2013-11-2014-04"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2013_11_2014_10" do
+  site "os.openstreetmap.org"
+  title "Changes November 2013 to October 2014"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2013-11-2014-10-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2013-11-2014-10"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2013_11_2015_05" do
+  site "os.openstreetmap.org"
+  title "Changes November 2013 to May 2015"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2013-11-2015-05-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2013-11-2015-05"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2013_11_2015_11" do
+  site "os.openstreetmap.org"
+  title "Changes November 2013 to November 2015"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2013-11-2015-11-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2013-11-2015-11"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2013_11_2016_04" do
+  site "os.openstreetmap.org"
+  title "Changes November 2013 to April 2016"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2013-11-2016-04-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2016"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2013-11-2016-04"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2014_04_2014_10" do
+  site "os.openstreetmap.org"
+  title "Changes April 2014 to October 2014"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2014-04-2014-10-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2014"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2014-04-2014-10"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2014_04_2015_05" do
+  site "os.openstreetmap.org"
+  title "Changes April 2014 to May 2015"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2014-04-2015-05-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2014-04-2015-05"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2014_04_2015_11" do
+  site "os.openstreetmap.org"
+  title "Changes April 2014 to November 2015"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2014-04-2015-11-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2014-04-2015-11"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2014_04_2016_04" do
+  site "os.openstreetmap.org"
+  title "Changes April 2014 to April 2016"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2014-04-2016-04-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2016"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2014-04-2016-04"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2014_10_2015_05" do
+  site "os.openstreetmap.org"
+  title "Changes October 2014 to May 2015"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2014-10-2015-05-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2014-10-2015-05"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2014_10_2015_11" do
+  site "os.openstreetmap.org"
+  title "Changes October 2014 to November 2015"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2014-10-2015-11-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2014-10-2015-11"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2014_10_2016_04" do
+  site "os.openstreetmap.org"
+  title "Changes October 2014 to April 2016"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2014-10-2016-04-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2016"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2014-10-2016-04"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2015_05_2015_11" do
+  site "os.openstreetmap.org"
+  title "Changes May 2015 to November 2015"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2015-05-2015-11-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2015"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2015-05-2015-11"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2015_05_2016_04" do
+  site "os.openstreetmap.org"
+  title "Changes May 2015 to April 2016"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2015-05-2016-04-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2016"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2015-05-2016-04"]
+  overlay true
+end
+
+imagery_layer "gb_os_sv_diff_2015_11_2016_04" do
+  site "os.openstreetmap.org"
+  title "Changes November 2015 to April 2016"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/os-sv/ossv-diff-2015-11-2016-04-combined.vrt"
+  copyright "Contains Ordnance Survey data © Crown copyright and database right 2016"
+  extension "os_sv_diff_png"
+  url_aliases ["/sv-diff-2015-11-2016-04"]
+  overlay true
+end
+
+imagery_layer "gb_os_om_local_2016_10" do
+  site "os.openstreetmap.org"
+  title "OS OpenMap Local - October 2016"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/openmap-local/2016-10/os-openmap-local-2016-10.vrt"
+  copyright "Contains OS data © Crown copyright and database right 2016"
+  background_colour "213 244 248" # OS OpenMap Local Water Blue
+  extension "os_om_local_png"
+end
+
+imagery_layer "gb_os_om_local_2017_04" do
+  site "os.openstreetmap.org"
+  title "OS OpenMap Local - April 2017"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/openmap-local/2017-04/os-openmap-local-2017-04.vrt"
+  copyright "Contains OS data © Crown copyright and database right 2017"
+  background_colour "213 244 248" # OS OpenMap Local Water Blue
+  extension "os_om_local_png"
+end
+
+imagery_layer "gb_os_om_local_2017_10" do
+  site "os.openstreetmap.org"
+  title "OS OpenMap Local - October 2017"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/openmap-local/2017-10/os-openmap-local-2017-10.vrt"
+  copyright "Contains OS data © Crown copyright and database right 2017"
+  background_colour "213 244 248" # OS OpenMap Local Water Blue
+  extension "os_om_local_png"
+end
+
+imagery_layer "gb_os_om_local_2018_04" do
+  site "os.openstreetmap.org"
+  title "OS OpenMap Local - April 2018"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/openmap-local/2018-04/os-openmap-local-2018-04.vrt"
+  copyright "Contains OS data © Crown copyright and database right 2018"
+  background_colour "213 244 248" # OS OpenMap Local Water Blue
+  extension "os_om_local_png"
+end
+
+imagery_layer "gb_os_om_local_2018_05" do
+  site "os.openstreetmap.org"
+  title "OS OpenMap Local - May 2018"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/openmap-local/2018-05/os-openmap-local-2018-05.vrt"
+  copyright "Contains OS data © Crown copyright and database right 2018"
+  background_colour "213 244 248" # OS OpenMap Local Water Blue
+  extension "os_om_local_png"
+end
+
+imagery_layer "gb_os_om_local_2019_04" do
+  site "os.openstreetmap.org"
+  title "OS OpenMap Local - April 2019"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/openmap-local/2019-04/os-openmap-local-2019-04.vrt"
+  copyright "Contains OS data © Crown copyright and database right 2019"
+  background_colour "213 244 248" # OS OpenMap Local Water Blue
+  extension "os_om_local_png"
+end
+
+imagery_layer "gb_os_om_local_2020_04" do
+  site "os.openstreetmap.org"
+  title "OS OpenMap Local - April 2020"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/openmap-local/2020-04/os-openmap-local-2020-04-combined-sea-average-zstd22.vrt"
+  copyright "Contains OS data © Crown copyright and database right 2020"
+  revision 2
+  background_colour "213 244 248" # OS OpenMap Local Water Blue
+  extension "os_om_local_png"
+end
+
+imagery_layer "gb_os_om_local_2020_10" do
+  site "os.openstreetmap.org"
+  title "OS OpenMap Local - October 2020"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/openmap-local/2020-10/os-openmap-local-2020-10.vrt"
+  copyright "Contains OS data © Crown copyright and database right 2020"
+  background_colour "213 244 248" # OS OpenMap Local Water Blue
+  extension "os_om_local_png"
+end
+
+imagery_layer "gb_os_om_local_2021_04" do
+  site "os.openstreetmap.org"
+  title "OS OpenMap Local - April 2021"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/openmap-local/2021-04/os-openmap-local-2021-04.vrt"
+  copyright "Contains OS data © Crown copyright and database right 2021"
+  background_colour "213 244 248" # OS OpenMap Local Water Blue
+  extension "os_om_local_png"
+end
+
+imagery_layer "gb_os_om_local_2021_10" do
+  site "os.openstreetmap.org"
+  title "OS OpenMap Local - October 2021"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/openmap-local/2021-10/os-openmap-local-2021-10.vrt"
+  copyright "Contains OS data © Crown copyright and database right 2021"
+  background_colour "213 244 248" # OS OpenMap Local Water Blue
+  extension "os_om_local_png"
+end
+
+imagery_layer "gb_os_om_local_2022_04" do
+  site "os.openstreetmap.org"
+  title "OS OpenMap Local - April 2022"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/openmap-local/2022-04/os-openmap-local-2022-04.vrt"
+  copyright "Contains OS data © Crown copyright and database right 2022"
+  background_colour "213 244 248" # OS OpenMap Local Water Blue
+  extension "os_om_local_png"
+end
+
+imagery_layer "gb_os_om_local_2022_10" do
+  site "os.openstreetmap.org"
+  title "OS OpenMap Local - October 2022"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/openmap-local/2022-10/os-openmap-local-2022-10.vrt"
+  copyright "Contains OS data © Crown copyright and database right 2022"
+  background_colour "213 244 248" # OS OpenMap Local Water Blue
+  extension "os_om_local_png"
+end
+
+imagery_layer "gb_os_om_local_2023_04" do
+  site "os.openstreetmap.org"
+  title "OS OpenMap Local - April 2023"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/openmap-local/2023-04/os-openmap-local-2023-04.vrt"
+  copyright "Contains OS data © Crown copyright and database right 2023"
+  background_colour "213 244 248" # OS OpenMap Local Water Blue
+  extension "os_om_local_png"
+end
+
+imagery_layer "gb_os_om_local_2023_10" do
+  site "os.openstreetmap.org"
+  title "OS OpenMap Local - October 2023"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/openmap-local/2023-10/os-openmap-local-2023-10.vrt"
+  copyright "Contains OS data © Crown copyright and database right 2023"
+  background_colour "213 244 248" # OS OpenMap Local Water Blue
+  extension "os_om_local_png"
+end
+
+imagery_layer "gb_os_om_local_2024_04" do
+  site "os.openstreetmap.org"
+  title "OS OpenMap Local - April 2024"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/openmap-local/2024-04/os-openmap-local-2024-04.vrt"
+  copyright "Contains OS data © Crown copyright and database right 2024"
+  background_colour "213 244 248" # OS OpenMap Local Water Blue
+  extension "os_om_local_png"
+end
+
+imagery_layer "gb_os_om_local_2024_10" do
+  site "os.openstreetmap.org"
+  title "OS OpenMap Local - October 2024"
+  projection "EPSG:27700"
+  source "/store/imagery/gb/openmap-local/2024-10/os-openmap-local-2024-10.vrt"
+  copyright "Contains OS data © Crown copyright and database right 2024"
+  background_colour "213 244 248" # OS OpenMap Local Water Blue
+  extension "os_om_local_png"
+  url_aliases ["/om-local-2024-10", "/om-local", "/sv"]
+  default_layer true
+end