Map Kingdom of Yugoslavia Isogonic Chart Mokrovic 1927
| Original/Reproduction | Original |
|---|---|
| Type | Map |
| Cartographer/Publisher | Josip Mokrović |
| Date of Creation | 1927 |
| Country of Manufacture | Croatia |
| Listed By | Dealer or Reseller |
| Height (Inches) | 15 |
| Width (Inches) | 22 |
$260.00
In stock
The Isogonic Map of the Kingdom of Yugoslavia
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This map represents only the second known isogonic chart of the region, following Kugler’s 1922 version. Unlike Kugler’s limited depiction, which focused on a small zone bordered by Đurđevac, Bubnjarci, and Bjelovar, this chart offers the first comprehensive isogonic overview of the entire SHS territory. Isogons are conceptual lines that link points on Earth sharing the same magnetic declination—the angular difference between true north and magnetic north (lat. Declinatio). Lines marking equal declination are termed isogons, and those where the declination is exactly 0° are called agons. Declinations are categorized as either east (positive) or west (negative). Gradual changes in declination over time are referred to as regular variations, while abrupt anomalies are classified as geomagnetic storms. This chart is an exceptional rarity—no copies are currently held by public archives or official institutions.
We also offer other isogonic maps from this series.
Cartographer
Josip Mokrović, Croatian geophysicist (Kraj Gornji, Zapršići, June 12, 1898 – Zagreb, June 13, 1983). Graduated from the Faculty of Philosophy in Zagreb from the physics group of subjects (1934), where he got a PhD (1952). He worked at the Geophysical Institute of the Faculty of Science and Mathematics in Zagreb (1919–68) as a lecturer for geophysics students. He researched seismic activity, hodochrones and earthquake forecasting, underground rumblings, gravity, and atmospheric electricity. In 1927, he produced the first geomagnetic charts of the then Kingdom of SHS. Since 1952, he has worked as a scientific associate of JAZU.
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Year: 1927
Place of publishing: Kingdom of SHS
Cartographer: Josip Mokrović
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Size: 55 x 47 cm
Condition: Folded as issued, few stains on the cartouche, minor tears on the lower edge (up to 1mm), excellent condition overall.
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For details of the item’s condition, please refer to the images. If you have any questions, don’t hesitate to contact us!
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