Specs
Our maps are a horizontal mount orientation, which is designed to allow the viewer to walk the length of the print at eye level at a close sight distance to see the incredible detail in the print. No more ridiculous vertical A.T. maps requiring tiptoes or binoculars.
Note, the A.T. does NOT run North-South – (not even close), so the vertically oriented maps normally produced do nothing for proper geographic visual orientation – they simply are nearly impossible to read at the extreme top and bottom edges unless you like deep knee bends and can also use stilts.
Map width: 10.0 feet, canvas edge-to-canvas edge.
Map height: 2.0 feet, canvas edge-to-canvas edge.
Map Weight: ≈755 grams, or ≈1 lb, 11 oz (can vary slightly due to customer preferences on ink density for custom maps)
Top & Bottom white margins (each): 7/8″ (can vary slightly due to canvas roll variations)
Left & Right white margins (each): 7/8″ (can vary slightly due to canvas roll variations)
Map scale: 1: 700,000, 1 cm ≡ 7.000 kilometers, 1″ ≈ 11.048 miles.
Map Projection: Custom conformal ellipsoidal projection engineered expressly for the A.T. Maximum scale factor error at any point on the A.T. is less than 0.01%. Not 1%. We mean 0.01% . Yup!
This is not an equal-area projection like the Albers equal-area conic projection used by the NatGeo 4′ A.T. map which distorts E-W vs N-S distances. (Yuck!) That projection is fine if displaying the entire USA, but not so fine for just the Appalachian Trail. There are much better ways. We employ them.
Map file resolution: 600 pixels/inch
Media: Hewlett-Packard Professional Matte Canvas. 392 grams/sq. meter, 18.1 mil thickness. Brightness: 101 per TAPPI T-452 Test Method. Whiteness: 133 per CIE Ganz 82 Test Method. Opacity >99%. Made in the USA.
Inks: Hewlett-Packard 746 Vivid Photo Pigmented Inks.
Country of Origin: Designed and printed in the USA.
Print Longevity: According to Wilhelm Research, the display permanence of a naked print made using our exact media and inks described above is >100 years, >250 years under glass, and >350 years with UV filter. We use the great stuff. Our maps will last you a lifetime. See:
http://www.wilhelm-research.com/hp/WIR_HP_Z9+_Print_Permanence_Ratings_2020-02-08.pdf
and: