C80 British Isles

On this edition the magnetic variation curves have been updated with 2020 data. Under new royalty terms, the DGA (Danish Geodata Agency) have made it unviable to reproduce their copyrighted data. All DGA data has been removed from this chart. There has been general updating throughout.

• | : Imray
• | Publisher: Imray, Laurie, Norie & Wilson Ltd
• | Publication Date: Jan 29, 2021
• | Country of Publication: United Kingdom
• | Number of Pages: 1 pages
• | Language: Unknown
• | Binding: Sheet map, folded
• | ISBN-10: 1786792508
• | ISBN-13: 9781786792501