![Magnetic Declination Isogonic Lines for the year 1870 (Variations of the Compass): Geographicus Rare Antique Maps Magnetic Declination Isogonic Lines for the year 1870 (Variations of the Compass): Geographicus Rare Antique Maps](https://www.geographicus.com/mm5/graphics/00000001/L/MagneticDeclination-uscs-1870.jpg)
Magnetic Declination Isogonic Lines for the year 1870 (Variations of the Compass): Geographicus Rare Antique Maps
![The horizontal intensity and magnetic declination observed at Greenwich... | Download Scientific Diagram The horizontal intensity and magnetic declination observed at Greenwich... | Download Scientific Diagram](https://www.researchgate.net/profile/Fridrich-Valach/publication/332961597/figure/fig3/AS:756524691509250@1557380950898/The-horizontal-intensity-and-magnetic-declination-observed-at-Greenwich-during-the.png)
The horizontal intensity and magnetic declination observed at Greenwich... | Download Scientific Diagram
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Compass on map. Tourist compass for orientation on the terrain. Magnetic declination сalculator. Historical explorer help. Map reading and land naviga Stock Photo - Alamy
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