Metadata: Identification_Information: Citation: Citation_Information: Originator: National Atlas of the United States Publication_Date: 200512 Title: Color Conterminous United States Shaded Relief – 200-Meter Resolution Geospatial_Data_Presentation_Form: Map Publication_Information: Publication_Place: Reston, VA Publisher: National Atlas of the United States Online_Linkage: Description: Abstract: The color conterminous United States shaded relief data were derived from National Elevation Dataset (NED) data, and show the terrain of the conterminous United States at a resolution of 200 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. Purpose: The color shaded relief images were developed to portray the terrain of the United States. They are intended for visual purposes only. The original NED data must be used for conducting analysis and determining elevation values. Supplemental_Information: The associated world file is included as part of the GeoTIFF. The contents of the world file are: >200.0000 >0.000000 >0.000000 >-200.0000 >-2262900.0000 >1038900.0000 The following projection file can be used when using ESRI's ArcGIS to view the GeoTIFF (any line breaks should be removed): PROJCS["NAD_1983_Lambert_Azimuthal_Equal_Area",GEOGCS ["GCS_Sphere_ARC_INFO",DATUM["D_Sphere_ARC_INFO",SPHEROID ["Sphere_ARC_INFO",6370997.0,0.0]],PRIMEM["Greenwich",0.0], UNIT["Degree",0.0174532925199433]],PROJECTION ["Lambert_Azimuthal_Equal_Area"],PARAMETER["False_Easting",0.0], PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian", -100.0],PARAMETER["Latitude_Of_Origin",45.0],UNIT["Meter",1.0]] Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 200209 Currentness_Reference: Date of elevation data download Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -133 East_Bounding_Coordinate: -59 North_Bounding_Coordinate: 51 South_Bounding_Coordinate: 19 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: elevation Theme_Keyword: imageryBaseMapsEarthCover Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Digital Elevation Model Theme_Keyword: Shaded Relief Theme_Keyword: Topography Theme_Keyword: Topographic Theme_Keyword: DEM Theme_Keyword: NED Place: Place_Keyword_Thesaurus: None Place_Keyword: United States Place_Keyword: Alabama Place_Keyword: Arizona Place_Keyword: Arkansas Place_Keyword: California Place_Keyword: Colorado Place_Keyword: Connecticut Place_Keyword: Delaware Place_Keyword: District of Columbia Place_Keyword: Florida Place_Keyword: Georgia Place_Keyword: Idaho Place_Keyword: Illinois Place_Keyword: Indiana Place_Keyword: Iowa Place_Keyword: Kansas Place_Keyword: Kentucky Place_Keyword: Louisiana Place_Keyword: Maine Place_Keyword: Maryland Place_Keyword: Massachusetts Place_Keyword: Michigan Place_Keyword: Minnesota Place_Keyword: Mississippi Place_Keyword: Missouri Place_Keyword: Montana Place_Keyword: Nebraska Place_Keyword: Nevada Place_Keyword: New Hampshire Place_Keyword: New Jersey Place_Keyword: New Mexico Place_Keyword: New York Place_Keyword: North Carolina Place_Keyword: North Dakota Place_Keyword: Ohio Place_Keyword: Oklahoma Place_Keyword: Oregon Place_Keyword: Pennsylvania Place_Keyword: Rhode Island Place_Keyword: South Carolina Place_Keyword: South Dakota Place_Keyword: Tennessee Place_Keyword: Texas Place_Keyword: Utah Place_Keyword: Vermont Place_Keyword: Virginia Place_Keyword: Washington Place_Keyword: West Virginia Place_Keyword: Wisconsin Place_Keyword: Wyoming Access_Constraints: None. Use_Constraints: None. Acknowledgment of the U.S. Geological Survey, Center for EROS and (or) the National Atlas of the United States would be appreciated in products derived from these data. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: John Hutchinson Contact_Organization: SAIC Contact_Address: Address_Type: Mailing address Address: USGS Center for EROS City: Sioux Falls State_or_Province: SD Postal_Code: 57198-0001 Country: USA Contact_Voice_Telephone: 605-594-6049 Contact_Electronic_Mail_Address: hutch@usgs.gov Native_Data_Set_Environment: 1-band TIFF format created using ArcInfo 8.3 and then processed through custom software to create the GeoTIFF format. Cross_Reference: Citation_Information: Originator: National Atlas of the United States Publication_Date: 200512 Title: Color Alaska Shaded Relief – 200-Meter Resolution Publication_Information: Publication_Place: Reston, VA Publisher: National Atlas of the United States Online_Linkage: Cross_Reference: Citation_Information: Originator: National Atlas of the United States Publication_Date: 200512 Title: Color Hawaii Shaded Relief – 200-Meter Resolution Publication_Information: Publication_Place: Reston, VA Publisher: National Atlas of the United States Online_Linkage: Cross_Reference: Citation_Information: Originator: National Atlas of the United States Publication_Date: 200512 Title: Color Puerto Rico and the U.S. Virgin Islands Shaded Relief – 200- Meter Resolution Publication_Information: Publication_Place: Reston, VA Publisher: National Atlas of the United States Online_Linkage: Cross_Reference: Citation_Information: Originator: National Atlas of the United States Publication_Date: 200603 Title: Color Conterminous United States Shaded Relief – 200-Meter Resolution, Albers projection Publication_Information: Publication_Place: Reston, VA Publisher: National Atlas of the United States Online_Linkage: Cross_Reference: Citation_Information: Originator: National Atlas of the United States Publication_Date: 200603 Title: Color Alaska Shaded Relief – 200-Meter Resolution, Albers projection Publication_Information: Publication_Place: Reston, VA Publisher: National Atlas of the United States Online_Linkage: Cross_Reference: Citation_Information: Originator: National Atlas of the United States Publication_Date: 200603 Title: Color Hawaii Shaded Relief – 200-Meter Resolution, Albers projection Publication_Information: Publication_Place: Reston, VA Publisher: National Atlas of the United States Online_Linkage: Cross_Reference: Citation_Information: Originator: National Atlas of the United States Publication_Date: 200603 Title: Color Puerto Rico and the U.S. Virgin Islands Shaded Relief – 200- Meter Resolution, Albers projection Publication_Information: Publication_Place: Reston, VA Publisher: National Atlas of the United States Online_Linkage: Data_Quality_Information: Logical_Consistency_Report: No tests for logical consistency have been performed on this map layer. Completeness_Report: Data completeness reflects the content of the original NED elevation data. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2002 Title: National Elevation Dataset Edition: 1 Publication_Information: Publication_Place: Sioux Falls, SD Publisher: U.S. Geological Survey Online_Linkage: Type_of_Source_Media: Online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2002 Source_Currentness_Reference: Date of elevation data download. Source_Citation_Abbreviation: National Elevation Dataset Source_Contribution: Elevation information. Source_Information: Source_Citation: Citation_Information: Originator: National Atlas of the United States Publication_Date: 1999 Title: Shoreline file in Lambert Azimuthal Equal Area projection Publication_Information: Publication_Place: Reston, VA Publisher: National Atlas of the United States Type_of_Source_Media: Internal file Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1972 Ending_Date: 1999 Source_Currentness_Reference: Ground condition Source_Citation_Abbreviation: shorelp020l Source_Contribution: Shoreline mask for area of coverage. Source_Information: Source_Citation: Citation_Information: Originator: USGS, Center for EROS Publication_Date: Unpublished material Title: Conterminous United States Color Elevation Grid Type_of_Source_Media: Internal file Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2002 Source_Currentness_Reference: Date of elevation data. Source_Citation_Abbreviation: ElevationUS_2002 Source_Contribution: Elevation information. Source_Information: Source_Citation: Citation_Information: Originator: USGS Center for EROS Publication_Date: 200509 Title: Grayscale Conterminous United States Shaded Relief – 200-Meter Resolution Geospatial_Data_Presentation_Form: Map Publication_Information: Publication_Place: Reston, VA Publisher: National Atlas of the United States Online_Linkage: Type_of_Source_Media: Online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 200209 Source_Currentness_Reference: Date of elevation data. Source_Citation_Abbreviation: GrayscaleUS Source_Contribution: Elevation information. Process_Step: Process_Description: Four elevation mosaics were extracted from the National Elevation Dataset (NED) and used to produce the shaded relief images of the conterminous United States, Alaska, Hawaii, and Puerto Rico and the U.S. Virgin Islands. A separate image was created for each of the four areas because, at 200-meter resolution, file size for an elevation mosaic of all of the United States would exceed the processing capacity of some commonly-used GIS and image processing software packages. For the conterminous United States, elevation data were extracted from the NED and projected to a Lambert Azimuthal Equal-Area (LAZ) projection centered on 100 degrees West, 45 degrees North, with a pixel size of 200 meters. The datum for NED data is NAD83, except for Alaska which uses NAD27. Because there is no ellipsoidal form of the Lambert Azimuthal Equal-Area projection, once data have been projected to LAZ they lose any datum affiliation and instead are based on a sphere with a radius of 6370997 meters. However, some commonly-used software packages will report an error if a datum is not specified, so to accommodate such software, the GeoTIFF for this shaded-relief map layer retains the NAD83 datum associated with the original NED data from which it was derived. Using the ArcInfo Polygrid command, a 0/1 land/water mask was created for the conterminous United States at the same 200 meter resolution as the elevation data, using coastline data clipped from the National Atlas shoreline file. The land/water mask was applied to the 16-bit elevation grid. The masked elevation grid as well as the mask itself is available on request. More information on the NED may be found by following the links at . A color elevation image was created by slicing the elevation data using the ranges (listed in feet; divide by 3.2808 to get meters) and RGB color values below. >From To index red green blue >--------------------------------------------------- >-250 0 1 220 220 220 >1 249 2 127 159 101 >250 499 3 130 176 112 >500 999 4 160 194 124 >1000 1499 5 185 214 124 >1500 1999 6 207 224 156 >2000 2499 7 223 233 168 >2500 2999 8 241 238 166 >3000 3499 9 237 223 159 >3500 3999 10 240 210 141 >4000 4499 11 230 188 138 >4500 4999 12 216 165 133 >5000 5499 13 197 149 135 >5500 5999 14 217 165 156 >6000 6499 15 227 183 177 >6500 6999 16 223 192 191 >7000 7499 17 239 205 217 >7500 7999 18 244 215 225 >8000 8499 19 243 223 233 >8500 8999 20 248 227 232 >9000 9499 21 248 233 238 >9500 9999 22 246 240 245 >10000 19476 23 255 255 255 >Water 0 132 193 255 > Source_Used_Citation_Abbreviation: National Elevation Dataset Source_Used_Citation_Abbreviation: shorelp020l Process_Date: 200212 Source_Produced_Citation_Abbreviation: ElevationUS_2002 Process_Step: Process_Description: ElevationUS_2002 was converted in Adobe Photoshop from RGB to CMY (no black generated). The contrast of GrayscaleUS was enhanced in Adobe Photoshop by using a tritone technique. The enhanced grayscale image was added as a black band to the converted color elevation image to create a CMYK color shaded relief image. The CMYK image was converted in Photoshop to RGB for use in the online National Atlas. In the combined image, the water and non-U.S. land areas no longer had the correct values, so they were reset to meet the requirements of the National Atlas Map Maker. Open water areas were selected using Adobe Photoshop’s magic wand function and set to a RGB value of (132, 193, 255). The same technique was used to select non-U.S. land, and the RGB value was set to (132, 158, 172). The Photoshop image was saved in as a TIFF, ingested into ArcInfo as a grid using the command IMAGEGRID, saved as a TIFF from ArcInfo using the command GRIDIMAGE, and then processed through a USGS GeoTIFF software program to create a fully-compliant GeoTIFF with valid header information. Source_Used_Citation_Abbreviation: ElevationUS_2002 Source_Used_Citation_Abbreviation: GrayscaleUS Process_Date: 200508 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Grid Cell Row_Count: 17280 Column_Count: 25740 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Lambert Azimuthal Equal Area Lambert_Azimuthal_Equal_Area: Longitude_of_Projection_Center: -100.00 Latitude_of_Projection_Center: 45.00 False_Easting: 0.0 False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: Row and column Coordinate_Representation: Abscissa_Resolution: 200.0 Ordinate_Resolution: 200.0 Planar_Distance_Units: Meters Geodetic_Model: Horizontal_Datum_Name: None Ellipsoid_Name: Sphere Semi-major_Axis: 6370997.0 Denominator_of_Flattening_Ratio: 1.0 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: Shaded relief TIFF image grid cell Entity_Type_Definition: Any of the data elements in the shaded relief file. Entity_Type_Definition_Source: National Atlas of the United States Attribute: Attribute_Label: Shaded relief TIFF image values Attribute_Definition: Color values for the TIFF image. Attribute_Definition_Source: National Atlas of the United States Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 255 Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Earth Science Information Center, U.S. Geological Survey Contact_Address: Address_Type: Mailing address Address: 507 National Center City: Reston State_or_Province: VA Postal_Code: 20192 Country: USA Contact_Voice_Telephone: 1-888-ASK-USGS (1-888-275-8747) Contact_Voice_Telephone: 703-648-5920 Contact_Instructions: In addition to the address above there are other ESIC offices throughout the country. A full list of these offices is at . Distribution_Liability: Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made by the U.S. Geological Survey regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. Use of trademarks or formats does not constitute endorsement by the U.S. Geological Survey. There are no copyright restrictions on the use, redistribution, or further processing of this map layer. No responsibility is assumed by the U.S. Geological Survey in the use of these data. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: TIFF Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: Fees: There is no charge for the map layer. Metadata_Reference_Information: Metadata_Date: 20060829 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Peg Rawson Contact_Organization: National Atlas of the United States Contact_Address: Address_Type: Mailing address Address: 12201 Sunrise Valley Drive Address: MS-561 City: Reston State_or_Province: VA Postal_Code: 20192 Country: USA Contact_Voice_Telephone: 703-648-4183 Contact_Electronic_Mail_Address: atlasmail@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Security_Information: Metadata_Security_Classification_System: None Metadata_Security_Classification: Unclassified Metadata_Security_Handling_Description: None