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Service Description: The USGS Hill Shade base map from The National Map was created from the National Elevation Dataset (NED), a seamless dataset of best available raster elevation data for the conterminous United States, Alaska, Hawaii, and Territorial Islands. Derived from the NED using a hill-shade technique, this base map represents a continental view showing shaded relief from USGS NED layers at resolutions of 1/3-, 1-, and 2-arc-second (in Alaska only). Shaded relief (or hill shade) function parameters are: point illumination is from the NW (azimuth = 315 degrees), and altitude of the light source is 45 degrees. Color characteristics are the result of applying a color ramp in which RGB values range from white (RGB: 255, 255, 255) to brown (RGB: 166, 150, 109). The color ramp was applied with a Stretch Type of None. Contrast and Brightness values range from 4-14%, depending on scale, for cartographic purposes. For additional information on the NED, go tohttp://ned.usgs.gov.

Map Name: Layers

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All Layers and Tables

Layers:

• USGS Shaded Relief Basemap - 18k and Smaller (0)

Description:

Copyright Text: USGS TNM

Spatial Reference: 102100  (3857)


Single Fused Map Cache: true

Tile Info:

• Height: 256
• Width: 256
• DPI: 96
• Levels of Detail: 20
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  • Resolution: 156543.03392800014
  • Scale: 5.91657527591555E8
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  • Resolution: 0.29858214164761665
  • Scale: 1128.497176
• Format: JPEG
• Compression Quality: 75.0
• Origin: X: -2.0037508342787E7
  Y: 2.0037508342787E7
  
• Spatial Reference: 102100  (3857)
  

Initial Extent:

XMin: -2.1573328350317966E7
YMin: -1253358.1726200376
XMax: 615779.76344027
YMax: 1.3818488848045934E7
Spatial Reference: 102100  (3857)

Full Extent:

XMin: -5.7845181481398E7
YMin: -4.36719999717797E7
XMax: 3.65502679771861E7
YMax: 5.40108531992924E7
Spatial Reference: 102100  (3857)

Units: esriMeters

Supported Image Format Types: PNG32,PNG24,PNG,JPG,DIB,TIFF,EMF,PS,PDF,GIF,SVG,SVGZ,BMP

Document Info:

Title: USGS Shaded Relief Basemap
Author: U. S. Geological Survey - National Geospatial Program
Comments: See http://viewer.nationalmap.gov/help for assistance with TNM Viewer, services, or metadata.
Subject: USGS The National Map Shaded Relief Basemap, visible at scales smaller than 1:18,000
Category:
Keywords: USGS Shaded Relief Basemap Small Scale
AntialiasingMode: Best
TextAntialiasingMode: Force

Supports Dynamic Layers: false

MaxRecordCount: 1000

MaxImageHeight: 2048

MaxImageWidth: 2048

Supported Query Formats: JSON, AMF

Min Scale: 5.91657527591555E8

Max Scale: 18055.954822



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