Global GIS Raster Warning:
For the Global GIS product to make use of this dataset some processing was done to the original raster data. ArcView Data Publisher cannot query image pixel values. To overcome this problem a compromise was made. We created a 0.1 by 0.1 point file to store the image pixel values. Thus any values obtained from this method are approximate. For example, you may wish to query the exact top of a mountain peak for its' elevation. If this point does not fall exactly at a 0.1 x 0.1 degree point the value returned back to the user will be from the closest point. The value will not be as precise as the original dataset. The Shaded Relief was created using the in Arc/Info by Paul Schruben from the USGS in Reston, Virginia.
(Inserted by Trent Hare)
Global 30-Arc-Second Elevation Data Set |
More Infomation: GTOPO30 Readme
Identification
Information
Spatial
Reference Information
Distribution
Information
Metadata
Reference Information
CITATION Publication Date:1996 Title:Global
30-Arc-Second Elevation Data Set Geospatial Data Presentation Form:Model
Publication Information
Publication Place:Sioux Falls, South Dakota Publisher:U.S.
Geological Survey
DESCRIPTION
Abstract:
Digital elevation model (DEM) data are sampled arrays of surface
elevations in raster form. A DEM provides elevation values in
rows and columns, corresponding to a regular grid of points on
the Earth's surface. The Global 30-Arc-Second Elevation Data Set
(GTOPO30) is so named, because the spacing between adjacent elevation
points is 30 arc-seconds (approximately 1 kilometer) of latitude and
longitude.
Completed in 1997, the GTOPO30 data set was developed at the
U.S. Geological Survey's EROS Data Center over a 3-year period
with support from several national and international cooperators.
Using eight data sources, a global 30-arc-second DEM resulted from
this cooperative effort.
The GTOPO30 data are suitable for many regional and continental
applications, including climate modeling; continental-scale land
cover mapping; extraction of drainage features for hydrologic
modeling; and geometric and atmospheric correction of medium- and
coarse-resolution satellite image data.
The Global Land Information System (GLIS) and the EOSDIS Information
Management System (IMS) are interactive query systems providing
information on this data set and on a variety of other data sets.
These systems also support data visualization and ordering services.
For more information about these systems, see the following home pages:
GLIS Home Page: http://gcmd.gsfc.nasa.gov/cgi-bin/md/redirect.pl?target=http://edcwww.cr.usgs.gov/glis/glis.html
EDC DAAC Home Page: http://gcmd.gsfc.nasa.gov/cgi-bin/md/redirect.pl?target=http://edcwww.cr.usgs.gov/landdaac/
References:
Gesch, D.B., and Larson, K.S., in press, Techniques for
development of global 1-kilometer digital elevation models,
in Pecora Thirteen, Human Interactions with the
Environment--Perspectives from Space, 13th, Sioux Falls, South
Dakota, August 20-22, 1996, Proceedings: Bethesda, Maryland,
American Society of Photogrammetry and Remote Sensing.
Verdin, K.L., and Jenson, S.K., 1996, Development of
continental scale DEMs and extraction of hydrographic
features, in National Center for Geographic Information
and Analysis (NCGIA) International Conference/Workshop on
Integrating GIS and Environmental Modeling, Third, Sante Fe,
New Mexico, January 21-25, 1996, Proceedings, CD-ROM,
1 disc. [Disc contains a Readme file.]
SUPPLEMENTAL INFORMATION:
Sources:
DEM > Digital Elevation Model
SPATIAL DOMAIN
Bounding Coordinates:
West Bounding Coordinate:180W
East Bounding Coordinate:180E
South Bounding Coordinate:90S
North Bounding Coordinate:90N
STATUS
Dataset Progress: COMPLETE
KEYWORDS
Theme Keyword Thesaurus:
GCMD Parameter Keywords
Theme Keywords:
EARTH SCIENCE >LAND SURFACE >TOPOGRAPHY >CONTOURS >
EARTH SCIENCE >LAND SURFACE >TOPOGRAPHY >LANDFORMS >
EARTH SCIENCE >LAND SURFACE >TOPOGRAPHY >RELIEF >
EARTH SCIENCE >LAND SURFACE >TOPOGRAPHY >SURFACE ROUGHNESS >
EARTH SCIENCE >LAND SURFACE >TOPOGRAPHY >TERRAIN ELEVATION >
ANALYSIS
DAAC
DEM
DIGITAL ELEVATION MODEL
DIGITAL MAPPING
DIGITAL TERRAIN ELEVATION DATA
DTED
EARTH
EDC
ELEVATION DATA
EOSDIS
EROS
MODEL
RASTER DATA
SCAR
SLOPE
TOPOGRAPHY
USGS
Place Keyword Thesaurus:
GCMD Location Keywords
Place Keywords:
AFRICA
ANTARCTICA
ASIA
AUSTRALIA
EUROPE
GLOBAL
NORTH AMERICA
SOUTH AMERICA
ACCESS CONSTRAINTS
None
USE CONSTRAINTS
None
POINT OF CONTACT
Contact Person:INFORMATION SYSTEMS MANAGEMENT,PLEASE CONTACT
Contact Position: DIF Author
Address:
Information Systems Management
U.S. Geological Survey
EROS Data Center
47914 252nd Street
Sioux Falls, SD 57198-0001
USA
Telephone:605-594-6594
Electronic Mail Address:CUSTSERV@EDCMAIL.CR.USGS.GOV
DISTRIBUTOR
Contact Organization Primary:EDC_DAAC > EROS Data Center Distributed Active Archive Center
Contact Person:EDC DAAC USER SERVICES,PLEASE CONTACT
Address:
EDC DAAC User Services
U.S. Geological Survey
EROS Data Center
47914 252nd Street
Sioux Falls, SD 57198-0001
USA
Telephone:605-594-6116
Electronic Mail Address:EDC@EOS.NASA.GOV
DISTRIBUTOR
Contact Organization Primary:EROS > Earth Resources Observation Systems Data Center
Contact Person:CUSTOMER SERVICES,PLEASE CONTACT
Address:
Customer Services
U.S. Geological Survey
EROS Data Center
47914 252nd Street
Sioux Falls, SD 57198-0001
USA
Telephone:605-594-6151
Electronic Mail Address:CUSTSERV@EDCMAIL.CR.USGS.GOV
STANDARD ORDER PROCESS:
Digital Form:CD-ROM
Digital Transfer Information:
Format Name: ISO 9660
Transfer Size:.5 gigabyte uncompressed
Fees:$0
Digital Form:File Transfer Protocol
Digital Transfer Information:
Format Name: Raw
Transfer Size:25 megabyte maximum, compressed
Fees:$0
Digital Form:Tape
Digital Transfer Information:
Format Name: 8 mm, Tar High Density
Transfer Size:3 gigabyte maximum
Fees:$0
Online Transfer Option:
Network Address:
Network Resource Name: http://gcmd.gsfc.nasa.gov/cgi-bin/md/redirect.pl?target=http://edcwww.cr.usgs.gov/landdaac/
Online Transfer Option:
Network Address:
Network Resource Name: http://gcmd.gsfc.nasa.gov/cgi-bin/md/redirect.pl?target=http://edcwww.cr.usgs.gov/eros-home.html
Offline Medium:Magnetic Tape
METADATA REVIEW DATE:1997-07-03
|
Responsible NASA Official: Lola
Olsen, Code 902, olsen@gcmd.gsfc.nasa.gov |