imagery: add additional gb_os_sv_diff layers

[chef.git] / 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 439231cbebc6c07a7c3a8f7fd4e13b0976598b0f..9de3456ff0719fabd62818322bcce00ff1bbe9e4 100644 (file)
--- a/cookbooks/imagery/recipes/gb_os_sv.rb
+++ b/cookbooks/imagery/recipes/gb_os_sv.rb
@@ -43,7 +43,7 @@ end
 
 imagery_site "os.openstreetmap.org" do
   title "OpenStreetMap - Ordnance Survey OpenData - Street View"
-  aliases ["os.openstreetmap.org.uk"]
+  aliases ["os.openstreetmap.org", "a.os.openstreetmap.org", "b.os.openstreetmap.org", "c.os.openstreetmap.org", "os.openstreetmap.org.uk", "a.os.openstreetmap.org.uk", "b.os.openstreetmap.org.uk", "c.os.openstreetmap.org.uk"]
   bbox [[49.85, -10.5], [58.75, 1.9]]
 end
 
@@ -188,6 +188,7 @@ imagery_layer "gb_os_sv_diff_2010_04_2010_11" do
   extension "os_sv_diff_png"
   url_aliases ["/sv-diff-2010-04-2010-11"]
   overlay true
+  revision 2
 end
 
 imagery_layer "gb_os_sv_diff_2010_04_2011_05" do
@@ -198,10 +199,9 @@ imagery_layer "gb_os_sv_diff_2010_04_2011_05" do
   extension "os_sv_diff_png"
   url_aliases ["/sv-diff-2010-04-2011-05"]
   overlay true
+  revision 2
 end
 
-=begin
-
 imagery_layer "gb_os_sv_diff_2010_04_2011_11" do
   site "os.openstreetmap.org"
   projection "EPSG:27700"
@@ -210,6 +210,7 @@ imagery_layer "gb_os_sv_diff_2010_04_2011_11" do
   extension "os_sv_diff_png"
   url_aliases ["/sv-diff-2010-04-2011-11"]
   overlay true
+  revision 2
 end
 
 imagery_layer "gb_os_sv_diff_2010_04_2012_05" do
@@ -220,6 +221,7 @@ imagery_layer "gb_os_sv_diff_2010_04_2012_05" do
   extension "os_sv_diff_png"
   url_aliases ["/sv-diff-2010-04-2012-05"]
   overlay true
+  revision 2
 end
 
 imagery_layer "gb_os_sv_diff_2010_04_2012_11" do
@@ -230,6 +232,7 @@ imagery_layer "gb_os_sv_diff_2010_04_2012_11" do
   extension "os_sv_diff_png"
   url_aliases ["/sv-diff-2010-04-2012-11"]
   overlay true
+  revision 1
 end
 
 imagery_layer "gb_os_sv_diff_2010_04_2013_05" do
@@ -240,6 +243,7 @@ imagery_layer "gb_os_sv_diff_2010_04_2013_05" do
   extension "os_sv_diff_png"
   url_aliases ["/sv-diff-2010-04-2013-05"]
   overlay true
+  revision 1
 end
 
 imagery_layer "gb_os_sv_diff_2010_04_2013_11" do
@@ -250,716 +254,716 @@ imagery_layer "gb_os_sv_diff_2010_04_2013_11" do
   extension "os_sv_diff_png"
   url_aliases ["/sv-diff-2010-04-2013-11"]
   overlay true
+  revision 1
 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
-
-=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
+#