This image is a composite from a series of
images created by the National Geophysical
Data Center (NGDC) in Boulder, CO.
Description:
Abstract:
This composite mosaic is a 2minute color relief
image North America. Six individual mosaics were
combined to create the overview. The images,
created by NOAA/NGDC combines topography and
bathymetry from a variety sources. The data were
gridded and processed to create a 45 deg illuminated
shaded relief image. The image was then color
coded to enhance the bathymetry/topography range.
Purpose:
This image may be used as a basemap layer in
various GIS projects.
Supplemental_Information:
This supplemental information was extracted from
the NGDC/NOAA, MGG website.
This image was generated from digital data bases of
seafloor and land elevations on a 2-minute
latitude/longitude grid (1 minute of latitude equals
1 nautical mile, or 1.852 km). Assumed illumination is
from the west; shading is computed as a function of
the east-west slope of the surface with a nonlinear
exaggeration favoring low-relief areas. A Cylindrical
Equidistant projection was used for the world image,
which spans 360 degrees of longitude from 180 West
eastward to 180 East; latitude coverage is from 90
degrees North to 90 degrees South. The resolution
of the gridded data varies from true 2-minute for
the Atlantic, Pacific, and Indian Ocean floors and
all land masses to 5 minutes for the Arctic Ocean
floor.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20010305
Currentness_Reference: creation of composite mosaic
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -84.13334722
East_Bounding_Coordinate: -56.66668333
North_Bounding_Coordinate: 47.23333889
South_Bounding_Coordinate: 21.73333889
Keywords:
Theme:
Theme_Keyword_Thesaurus: General
Theme_Keyword: National Oceanic and Atmospheric Administration
Theme_Keyword: NOAA
Theme_Keyword: National Geophysical Data Center
Theme_Keyword: NGDC
Theme_Keyword: Marine Geology and Geophysics
Theme_Keyword: MGG
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: Woods Hole Field Center
Theme_Keyword: basemap
Theme_Keyword: image
Theme_Keyword: color shaded relief
Theme_Keyword: earth surface
Theme_Keyword: topography
Theme_Keyword: bathymetry
Theme_Keyword: globe view
Theme_Keyword: global relief
Theme_Keyword: GEOTIFF
Place:
Place_Keyword_Thesaurus: General
Place_Keyword: North America
Place_Keyword: continental United States
Place_Keyword: east coast
Place_Keyword: Canada
Place_Keyword: Cuba
Place_Keyword: Caribbean
Access_Constraints: None
Use_Constraints:
No detailed use constraints for this data set
could be found at the NOAA/NGDC site.
Although this derived data set and it's lineage dataset
have been used by the USGS, no warranty, expressed
or implied, is made by the USGS as to the accuracy
of the data and/or related materials. The act of
distribution shall not constitute any such warranty, and
no responsibility is assumed by the USGS in the use
of these data or related materials.
Browse_Graphic_File_Name:topo.jpg Browse_Graphic_File_Description: US East Coast shaded relief image for
project view Browse_Graphic_File_Type: JPEG
Data_Set_Credit:
Data were compiled and the images were created
by Dr. Peter Sloss, NOAA/NGDC, Boulder CO.
Data for the individual images were compiled from a
number of sources. For detailed information, please see www.ngdc.noaa.gov/mgg/image/2minrelief.html
Native_Data_Set_Environment: GEOTIFF format 3.0
Cross_Reference:
Citation_Information:
Originator: Dr. Peter Sloss(comp.)
Publication_Date: Unknown
Publication_Time: Unknown
Title: Surface of the Earth, 2 minute color relief images
The image is complete in as much as it covers the desired
area of interest. It should be noted, however, that this
image is a subset of the data set available from NOAA/NGDC.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Dr. Peter Sloss(comp.)
Publication_Date: Unknown
Publication_Time: Unknown
Title: Surface of the Earth, 2 minute color relief images
Each of the individual images were compiled in a separate
PCI image data base. The individual images were then
georeferenced according to their upper left and lower right
coordinates and 2 min (.0333334 deg) data resolution.
North America 2 deg shaded relief image: topography and bathymetry
Distribution_Liability:
Although this derived data set and it's lineage dataset
have been used by the USGS, no warranty, expressed
or implied, is made by the USGS as to the accuracy
of the data and/or related materials. The act of
distribution shall not constitute any such warranty, and
no responsibility is assumed by the USGS in the use
of these data or related materials.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: TIFF
File_Decompression_Technique: No compression applied
Transfer_Size: 1848Kb
Digital_Transfer_Option:
Offline_Option:
Offline_Media: CD-ROM
Recording_Capacity:
Recording_Density: 650
Recording_Density_Units: Mbytes
Recording_Format: ISO 9600
Compatibility_Information:
The user must have a system with a CD-ROM capable of
reading an ISO-9660 standard CD-ROM disk. To browse
the information contained on this disk, the user must also
have a current version of WWW browser available.
Digital_Form:
Digital_Transfer_Information:
Format_Name: ARCE
Format_Information_Content:
The GEOTIFF image, world file and georeference report
has been archived together in this zip format file.
File_Decompression_Technique: zip
Transfer_Size: 243Kb
Digital_Transfer_Option:
Offline_Option:
Offline_Media: CD-ROM
Recording_Capacity:
Recording_Density: 650
Recording_Density_Units: Mbytes
Recording_Format: ISO 9600
Compatibility_Information:
The user must have a system with a CD-ROM capable of
reading an ISO-9660 standard CD-ROM disk. To browse
the information contained on this disk, the user must also
have a current version of WWW browser available.
Fees: none
Technical_Prerequisites:
Access to the data and information contained on this
CD-ROM was developed using the HyperText Markup
Language (HTML) utilized by the World Wide Web
(WWW) project. Development of the CD-ROM
documentation and user interface in HTML allows a user
to access the information by using a variety of
WWW information browsers to facilitate browsing and
locating information and data. To access the information
contained on this disk with a WWW client browser, open
the file 'index.htm' at the top level directory of this CD-ROM
with your selected browser.
This CD-ROM should be readable by a variety of
operating systems including Windows 95/98/NT,
Macintosh and UNIX.
