USGS Releases New US Physical Features Map
From SILS Information Bulletin
The National Atlas of the United States has released a new map that emphasizes and labels America’s physical features. This map is designed to accentuate the beauty and diversity of the physical landscape of the United States.
The land surface of the United States is composed of a great variety of features, such as mountains, valleys, hills, plains, and plateaus that combine and interact to form the country’s physical landscape. These physical features are the result of many factors, including underlying geologic formations and structures, soils, climate, hydrology and man-made modifications. The Atlantic, Pacific, and Arctic Ocean drainage basin ranges are examples of how geology, climate and hydrology combine to separate waters flowing into the continent. For more detailed information on these divides, refer to the North America Watersheds map at http://nationalatlas.gov
There are many methods of portraying physical features on a map. Two are used here. The relief image on the main map was generated from the National Elevation Dataset (NED). On the small inset maps at upper left, the NED was used to produce color tints that denote areas with elevations that fall within the indicated ranges.
Elevation figures are not official and do not necessarily represent precisely measured or surveyed values. The principal source for elevation figures was the Geographic Names Information System.
This map measures approximately 40” by 46” and is available from USGS Science Information and Library Services (SILS). To place an order, call the SILS offices at 1-888-ASK-USGS, or place an order online through the USGS store at: http://store.usgs.gov. The stock number is 206944 and the price is $7.00 for the map plus $5.00 handling.