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Curves of equal magnetic variation 1927, sheet 1, Atlantic Ocean
- Author / Creator
- Available as
- Physical
Details
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- Creator
- reduced to the epoch June 1927 from observations by officers of His Majesty's Royal Navy and from surveys carried out by colonial and foreign governments and by the Carnegie Institution of Washington, compiled at the Royal Observatory, Greenwich ; published at the Admiralty, 9th Mar. 1927
- Format
- Maps, Atlases
- Language
- English
- Publication
-
- London : Hydrographic Office, Admiralty, 1927
- Series
- Physical Details
-
- 1 map : color ; 99 x 66 cm, on sheet 103 x 70 cm
- OCLC
- on1008966729
- Cartographic Data
-
Scale approximately 1:22,000,000(W 77°00ʹ00ʺ--E 48°00ʹ00ʺ/N 71°30ʹ00ʺ--S 65°00ʹ00ʺ).
- Includes lines of magnetic variation, annotations in pencil and 1 inset map: Curves of approximate annual change of the magnetic variation in minutes of arc for the epoch 1927.
- "Engraved 1912."
- "74.27" -- upper right corner.
- "Zzc 1927" -- lower right corner.
- "3775."