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100-Meter Resolution Natural Earth of Alaska

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Abstract/Contents

Abstract
This layer is a georeferenced raster image representing a natural-earth image of Alaska. The image is land cover in natural colors combined with shaded relief, which produces a naturalistic rendition of the Earth's surface. The data set is in an Albers Equal-Area Conic projection. The Natural Earth data were produced from existing National Atlas land cover, elevation, and satellite view data, as well as MODIS Vegetation Continuous Fields data. This layer is part of the 1997-2014 edition National Atlas of the United States.
Purpose
The 100-meter resolution Natural Earth data were developed to portray the terrain and land cover of the United States at 1:1,000,000 scale. They are intended primarily for visual purposes. The original NLCD data or Landsat Thematic Mapper imagery data should be used for conducting scientific analysis, and the original NED data should be used for determining the most accurate elevation values. No responsibility is assumed by the National Atlas of the United States in the use of these data.

Description

Type of resource cartographic, software, multimedia
Form GeoTIFF
Place Rolla, Missouri, US
Publisher National Atlas of the United States
Date valid 2013
Publication date 2013
Language English
Digital origin born digital
Map data 1:1000000Scale not given. ; EPSG::3338 W 180°--E 180°/N 71°57ʹ17ʺ--N 43°3ʹ12ʺW 180°--E 179°59ʹ58ʺ/N 71°57ʹ17ʺ--N 43°3ʹ12ʺ, Scale not given ; EPSG::4326

Creators/Contributors

Creator Geological Survey (U.S.)

Subjects

Subject Land cover
Subject Digital elevation models
Subject Alaska
Subject 2013
Subject Imagery and Base Maps
Subject Elevation
Genre Geospatial data
Genre Cartographic dataset

Bibliographic information

Supplemental information Included with the GeoTIFF are an information file (.xml), an auxiliary information file (.aux.xml), an image overview file (.ovr), a .tfw file (more information included below), and a .prj file (more information included below.) The contents of the associated world file (.tfw) are: >100.0 >0.0 >0.0 >-100.0 >-3326950.0 >2437950.0 The projection (.prj) file contains the following information: > PROJCS["Albers_NAD83_Alaska", >GEOGCS["GCS_North_American_1983", >DATUM["D_North_American_1983", >SPHEROID["GRS_1980",6378137.0,298.257222101]], >PRIMEM["Greenwich",0.0], >UNIT["Degree",0.0174532925199433]], >PROJECTION["Albers"], >PARAMETER["False_Easting",0.0], >PARAMETER["False_Northing",0.0], >PARAMETER["Central_Meridian",-154.0], >PARAMETER["Standard_Parallel_1",55.0], >PARAMETER["Standard_Parallel_2",65.0], >PARAMETER["Latitude_Of_Origin",50.0], >UNIT["Meter",1.0]] Data set extent in meters (Albers Equal-Area Conic projection) >North 2438000 >West -3327000 >East 1654000 >South 346000 There are no NULL or NODATA values in the GeoTIFF. Instead, all oceans are assigned a RGB color of (193, 224, 250) (blue) and all non-U.S. land is assigned a RGB color of (240, 235, 211) (tan). Information about National Atlas Web services can be found on the Web Map and Web Feature Services page; see <http://nationalatlas.gov/infodocs/webservices.html.>
WGS84 Cartographics This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
Location https://purl.stanford.edu/nr598jf9933

Access conditions

Use and reproduction
This item is in the public domain. There are no restrictions on use.
Copyright
This work is in the Public Domain, meaning that it is not subject to copyright.

Preferred citation

National Atlas of the United States. (2013). 100-Meter Resolution Natural Earth of Alaska. National Atlas of the United States. Available at: http://purl.stanford.edu/nr598jf9933.

Collection

National atlas of the United States of America, 1997-2014

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