X-Git-Url: https://git.openstreetmap.org/chef.git/blobdiff_plain/c8d5d507d85166e5e0f06247084743f49c82c890..4237ed0cf20c0db1beb664d88be242130c854da8:/cookbooks/imagery/recipes/gb_os_sv.rb

diff --git a/cookbooks/imagery/recipes/gb_os_sv.rb b/cookbooks/imagery/recipes/gb_os_sv.rb
index a679ce444..c6fa2b8c9 100644
--- a/cookbooks/imagery/recipes/gb_os_sv.rb
+++ b/cookbooks/imagery/recipes/gb_os_sv.rb
@@ -42,6 +42,7 @@ cookbook_file "/srv/imagery/common/osstvw_make_diffs" do
 end
 
 imagery_site "os.openstreetmap.org" do
+  title "OpenStreetMap - Ordnance Survey OpenData - Street View"
   aliases ["os.openstreetmap.org.uk"]
   bbox [[49.85, -10.5], [58.75, 1.9]]
 end
@@ -186,6 +187,7 @@ imagery_layer "gb_os_sv_diff_2010_04_2010_11" do
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2010"
   extension "os_sv_diff_png"
   url_aliases ["/sv-diff-2010-04-2010-11"]
+  overlay true
 end
 
 imagery_layer "gb_os_sv_diff_2010_04_2011_05" do
@@ -195,692 +197,767 @@ imagery_layer "gb_os_sv_diff_2010_04_2011_05" do
   copyright "Contains Ordnance Survey data © Crown copyright and database right 2011"
   extension "os_sv_diff_png"
   url_aliases ["/sv-diff-2010-04-2011-05"]
+  overlay true
 end
 
-=begin
-
-imagery_layer "gb_os_sv_diff_2010_04_2011_11" do
-  site "os.openstreetmap.org"
-  projection "EPSG:27700"
-  source "/data/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"]
-end
-
-imagery_layer "gb_os_sv_diff_2010_04_2012_05" do
-  site "os.openstreetmap.org"
-  projection "EPSG:27700"
-  source "/data/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"]
-end
-
-imagery_layer "gb_os_sv_diff_2010_04_2012_11" do
-  site "os.openstreetmap.org"
-  projection "EPSG:27700"
-  source "/data/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"]
-end
-
-imagery_layer "gb_os_sv_diff_2010_04_2013_05" do
-  site "os.openstreetmap.org"
-  projection "EPSG:27700"
-  source "/data/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"]
-end
-
-imagery_layer "gb_os_sv_diff_2010_04_2013_11" do
-  site "os.openstreetmap.org"
-  projection "EPSG:27700"
-  source "/data/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"]
-end
-
-imagery_layer "gb_os_sv_diff_2010_04_2014_04" do
-  site "os.openstreetmap.org"
-  projection "EPSG:27700"
-  source "/data/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"]
-end
-
-imagery_layer "gb_os_sv_diff_2010_04_2014_10" do
-  site "os.openstreetmap.org"
-  projection "EPSG:27700"
-  source "/data/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"]
-end
-
-imagery_layer "gb_os_sv_diff_2010_04_2015_05" do
-  site "os.openstreetmap.org"
-  projection "EPSG:27700"
-  source "/data/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"]
-end
-
-imagery_layer "gb_os_sv_diff_2010_04_2015_11" do
-  site "os.openstreetmap.org"
-  projection "EPSG:27700"
-  source "/data/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"]
-end
-
-imagery_layer "gb_os_sv_diff_2010_04_2016_04" do
-  site "os.openstreetmap.org"
-  projection "EPSG:27700"
-  source "/data/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"]
-end
-
-imagery_layer "gb_os_sv_diff_2010_11_2011_05" do
-  site "os.openstreetmap.org"
-  projection "EPSG:27700"
-  source "/data/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"]
-end
-
-imagery_layer "gb_os_sv_diff_2010_11_2011_11" do
-  site "os.openstreetmap.org"
-  projection "EPSG:27700"
-  source "/data/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"]
-end
-
-imagery_layer "gb_os_sv_diff_2010_11_2012_05" do
-  site "os.openstreetmap.org"
-  projection "EPSG:27700"
-  source "/data/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"]
-end
-
-imagery_layer "gb_os_sv_diff_2010_11_2012_11" do
-  site "os.openstreetmap.org"
-  projection "EPSG:27700"
-  source "/data/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"]
-end
-
-imagery_layer "gb_os_sv_diff_2010_11_2013_05" do
-  site "os.openstreetmap.org"
-  projection "EPSG:27700"
-  source "/data/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"]
-end
-
-imagery_layer "gb_os_sv_diff_2010_11_2013_11" do
-  site "os.openstreetmap.org"
-  projection "EPSG:27700"
-  source "/data/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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-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"]
-end
-
-=end
+#
+# imagery_layer "gb_os_sv_diff_2010_04_2011_11" do
+#   site "os.openstreetmap.org"
+#   projection "EPSG:27700"
+#   source "/data/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"]
+#   overlay true
+# end
+#
+# imagery_layer "gb_os_sv_diff_2010_04_2012_05" do
+#   site "os.openstreetmap.org"
+#   projection "EPSG:27700"
+#   source "/data/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"]
+#   overlay true
+# end
+#
+# imagery_layer "gb_os_sv_diff_2010_04_2012_11" do
+#   site "os.openstreetmap.org"
+#   projection "EPSG:27700"
+#   source "/data/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"]
+#   overlay true
+# end
+#
+# imagery_layer "gb_os_sv_diff_2010_04_2013_05" do
+#   site "os.openstreetmap.org"
+#   projection "EPSG:27700"
+#   source "/data/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"]
+#   overlay true
+# end
+#
+# imagery_layer "gb_os_sv_diff_2010_04_2013_11" do
+#   site "os.openstreetmap.org"
+#   projection "EPSG:27700"
+#   source "/data/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"]
+#   overlay true
+# end
+#
+# imagery_layer "gb_os_sv_diff_2010_04_2014_04" do
+#   site "os.openstreetmap.org"
+#   projection "EPSG:27700"
+#   source "/data/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"]
+#   overlay true
+# end
+#
+# imagery_layer "gb_os_sv_diff_2010_04_2014_10" do
+#   site "os.openstreetmap.org"
+#   projection "EPSG:27700"
+#   source "/data/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"]
+#   overlay true
+# end
+#
+# imagery_layer "gb_os_sv_diff_2010_04_2015_05" do
+#   site "os.openstreetmap.org"
+#   projection "EPSG:27700"
+#   source "/data/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"]
+#   overlay true
+# end
+#
+# imagery_layer "gb_os_sv_diff_2010_04_2015_11" do
+#   site "os.openstreetmap.org"
+#   projection "EPSG:27700"
+#   source "/data/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"]
+#   overlay true
+# end
+#
+# imagery_layer "gb_os_sv_diff_2010_04_2016_04" do
+#   site "os.openstreetmap.org"
+#   projection "EPSG:27700"
+#   source "/data/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
+# end
+#
+# imagery_layer "gb_os_sv_diff_2010_11_2011_05" do
+#   site "os.openstreetmap.org"
+#   projection "EPSG:27700"
+#   source "/data/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
+# end
+#
+# imagery_layer "gb_os_sv_diff_2010_11_2011_11" do
+#   site "os.openstreetmap.org"
+#   projection "EPSG:27700"
+#   source "/data/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
+# end
+#
+# imagery_layer "gb_os_sv_diff_2010_11_2012_05" do
+#   site "os.openstreetmap.org"
+#   projection "EPSG:27700"
+#   source "/data/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"]
+#   overlay true
+# end
+#
+# imagery_layer "gb_os_sv_diff_2010_11_2012_11" do
+#   site "os.openstreetmap.org"
+#   projection "EPSG:27700"
+#   source "/data/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"]
+#   overlay true
+# end
+#
+# imagery_layer "gb_os_sv_diff_2010_11_2013_05" do
+#   site "os.openstreetmap.org"
+#   projection "EPSG:27700"
+#   source "/data/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"]
+#   overlay true
+# end
+#
+# imagery_layer "gb_os_sv_diff_2010_11_2013_11" do
+#   site "os.openstreetmap.org"
+#   projection "EPSG:27700"
+#   source "/data/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
+#