[Silver Spring, MD] : U.S. Dept. of Transportation, FAA, National Aeronautical Charting Office, [2001-
31st ed., Aug. 9, 2001-
Vols. for <2001- > consult appropriate issue of Notices to airmen, NOTAMs, and flight information publications for supplemental data and current information.
Scale 1:1,000,000 ; Lambert conformal conic proj., standard parallels 41⁰20ʹ and 46⁰40ʹ (W 110⁰--W 93⁰/N 49⁰--N 40⁰).
Vols. for <Aug. 9, 2001- > have topographic data corrected to <Dec. 2000- > and include airspace amendments effective <July 12, 2001- > and all other aeronautical data received by <May 17, 2001- >; chart becomes obsolete for use in navigation upon publication of next ed.
Panel title. Relief shown by contours, tints, and spot heights. Includes location map and gradient tints diagram.