The Color Shaded Relief of Puerto Rico and the U.S. Virgin Islands map layer is a 100-meter resolution color-sliced elevation image of Puerto Rico and the U.S. Virgin Islands, with relief shading added to accentuate terrain features, in an Albers Equal-Area Conic projection. The image was produced by combining the 100-meter resolution color-sliced elevation and the grayscale shaded relief data sets that are distributed by the National Atlas of the United States. The color shaded relief data were derived from the National Atlas 100-meter resolution elevation data. The elevation data were derived from National Elevation Dataset (NED) data and show the terrain of the conterminous United States at a resolution of 100 meters. The NED is a raster product assembled by the U.S. Geological Survey, 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. This layer is part of the 1997-2014 edition National Atlas of the United States.The 100-meter resolution color shaded relief data were developed to portray the terrain of the United States at 1:1,000,000 scale. They are intended primarily for visual purposes. The original NED data should be used for conducting analysis and determining the most accurate elevation values. No responsibility is assumed by the National Atlas of the United States in the use of these data.