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Map Layer Info

100-Meter Resolution Elevation of the United States

What this map layer shows:

Elevation values, above or below mean sea level at a ground resolution of 100 meters. This map layer is comprised of four separate data files for the conterminous United States, Alaska, Hawaii, and Puerto Rico and the U.S. Virgin Islands.

Color-Sliced Elevation, Color Shaded Relief, and Gray Shaded Relief map layers generated from this one are also available.

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Background Information
Sample map Sample Map
This map layer was derived from the U.S. Geological Survey's National Elevation Dataset (NED). The NED is a raster product designed to provide national elevation data in a seamless form with a consistent datum, elevation unit, and projection. Data corrections made in the NED assembly process minimize artifacts, permit edge matching, and fill sliver areas of missing data. Elevation data sets have many uses. They provide shaded-relief backgrounds that aid in terrain recognition and interpretation and are used to determine landform characteristics such as slope and aspect. They aid stratification in land cover and ecoregion classification. Elevation data are also essential to correcting the geometry and radiometry of satellite images and aerial photographs.

The 100-Meter Resolution Elevation of the United States map layer was prepared by the National Atlas of the United States and is delivered in the Albers Equal-Area Conic map projection. This map layer is part of our collection of fundamental digital cartographic data known as 1. This collection includes base map data in vector format at 1:1,000,000-scale and in image format at 100-meter ground resolution. Read more about the 1. A Global Map edition of this map layer is also available.