http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
North Sea oil and gas activity and concession map
Also covers British Isles and adjacent waters.
Depths shown by gradient tints, soundings and isolines.
Includes inset map "North 62⁰ Norwegian Sea," list of abbreviations, and advertisements.