Rare Danish chart of the Kattegat, the treacherous body of water between Denmark and Sweden.

The charts marks soundings, hazards of the sea, and the position of lighthouses (highlighted in red and yellow), with principal ports and rivers marked.

The Royal Danish Chart Archive (1784 - 1973) or Det Kongelige Danske Søkaart-Archiv was established by the Danish Crown in 1784, Impressed by the French Dépot des Cartes de Marine, the crown recruited Captain Lieutenant Poul de Løwenørn to act as the first director of the archive, Lowenørn collected nautical charts from all parts of the world. The archive later began issing its own charts, often improving and updating older charts. The archive was merged with the Nautical Chart Archive and Life Guard in 1973.