-#
-# 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
-#