arch map
file_format_version 1
width 6
height 6
msg
Creator: Gnat the Gnu
Email: gnu@foo.bar
Date: Sat Dec 19 20:36:16 1998
endmsg
end
arch wall_0
end
arch wwall_0
x 1
end
arch gwall_0
x 2
end
arch woodwall_0
x 3
end