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New Elevation for Denali: With a slightly lower elevation, has the tallest mountain in North America shrunk? No, but advances in technology to better measure the elevation at the surface of the Earth have resulted in a more accurate summit height of Alaska’s natural treasure. The revised official height for “the high one” has been measured at 20,310 feet, just 10 feet less than the previous elevation of 20,320 feet which was established using 1950’s era technology. The USGS partnered with NOAA’s National Geodetic Survey (NGS), Dewberry, CompassData,(a subcontractor to Dewberry), the University of Alaska, Fairbanks, and the Denali National Park to conduct a precise Global Positioning System (GPS) measurement of a specific point at the mountain’s peak in late June. Feature story:

US Topo Map and Historical Topographic Map Collection News:

New Sunshine State Maps Add FS Data: Recently released US Topo maps for Florida now feature more trails using data provided by the U.S. Forest Service as well as trail information from other federal, state and private sources. Several of the 1,028 new maps for Florida now display parts of the Florida National Scenic Trail (FNST) and other designated public trails. Further notable upgrades to the new quadrangles include map symbol redesign, enhanced railroad information, and new road source data. Another source for selected trail data is provided to the USGS through a nationwide “crowdsourcing” project managed by the International Mountain Biking Association.

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