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$39.99
  • MUSEUM QUALITY INKS AND PAPER: Printed on thick 192gsm heavyweight matte paper with archival giclee inks, this historic fine art will decorate your wall for years to come.
  • VINTAGE MAP REPRODUCTION: Add style to any room\'s decor with this beautiful print. Whether your interior design is modern or classic, a map is never out of fashion.
  • FRAME READY: Your unframed poster will arrive crease-free, rolled in a sturdy mailing tube. Many maps fit easy-to-find standard size frames 16x20, 16x24, 18x24, 24x30, 24x36, saving on custom framing.
  • ATTENTION TO DETAIL: We edit every antique map for image quality, color and vibrance, so it can look its best while retaining historical character. Makes a great gift!
  • Watermarks will not appear in the printed picture. Some blemishes, tears, or stamps may be removed from the final print.
A highly unusual U.S. Coast Survey chart of the United States showing magnetic declination in the year 1870. Magnetic Declination, or as it is more commonly known Magnetic Variance, refers to the difference between true north and compass north. Magnetic variance changes both over time and from place to place, consequently accounting for compass errors was a major obstacle for many early cartographers. Today the magnetic variance in Florida is 0 degrees, but when this chart was made in 1870, the 0 degree point was in South Carolina. A cartographer traveling north from South Carolina to Maine would find that his compass miscalculated north by nearly 18 degrees! In other places the variance is even more extreme. Compiled under the direction of A. D. Bache, Superintendent of the Survey of the Coast of the United States and one of the most influential American cartographers of the 19th century.
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