USGS 30 ARC-second Global Elevation Data, GTOPO30 

GTOPO30 is a global raster digital elevation model (DEM) providing terrain
elevation data with a horizontal grid spacing of
30 arc seconds (approximately 1 kilometer). GTOPO30 was derived from several raster
and vector sources of topographic information. For easier distribution, GTOPO30
has been divided into tiles.
Detailed information on the characteristics of GTOPO30
including the data distribution format, the data sources, production methods, accuracy,
and hints for users, is found in the GTOPO30
README file.


GTOPO30, completed in late 1996, was developed over a three year period through a collaborative effort led by staff at the U.S. Geological Survey's Center for Earth Resources Observation and Science (EROS). The following organizations participated by contributing funding or source data:  the National Aeronautics and Space Administration (NASA), the United Nations Environment Program and Global Resource Information Database (UNEP and GRID), the U.S. Agency for International Development (USAID), the Instituto Nacional de Estadistica Geografica e Informatica (INEGI) of Mexico, the Geographical Survey Institute (GSI) of Japan, Manaaki Whenua Landcare Research of New Zealand, and the Scientific Committee on Antarctic Research (SCAR).

To Access Resource:

Questions? Email Resource Support Contact:

  • datahelp@ucar.edu

Keywords

Resource Type dataset
Temporal Range Begin N/A
Temporal Range End N/A
Temporal Resolution N/A
Bounding Box North Lat N/A
Bounding Box South Lat N/A
Bounding Box West Long N/A
Bounding Box East Long N/A
Spatial Representation N/A
Spatial Resolution N/A
Related Links

Related Resource #1 : This is a USGS data set available in the USGS long term archive.
Additional Information N/A
Resource Format Binary
Standardized Resource Format Binary
Asset Size 290.861 MB
Legal Constraints

Creative Commons Attribution 4.0 International License
Access Constraints None
Software Implementation Language N/A

Resource Support Name N/A
Resource Support Email datahelp@ucar.edu
Resource Support Organization N/A
Distributor NSF NCAR Geoscience Data Exchange
Metadata Contact Name N/A
Metadata Contact Email datahelp@ucar.edu
Metadata Contact Organization NSF NCAR Geoscience Data Exchange

Author Earth Resources Observation and Science Center, U.S. Geological Survey, U.S. Department of the Interior
Publisher NSF National Center for Atmospheric Research
Publication Date 1997-07-24
Digital Object Identifier (DOI) https://doi.org/10.5065/A1Z4-EE71
Alternate Identifier d758000
Resource Version N/A
Topic Category elevation
Progress completed
Metadata Date 2025-10-09T01:29:38Z
Metadata Record Identifier edu.ucar.gdex::d758000
Metadata Language eng; USA
Suggested Citation Earth Resources Observation and Science Center, U.S. Geological Survey, U.S. Department of the Interior. (1997). USGS 30 ARC-second Global Elevation Data, GTOPO30. NSF National Center for Atmospheric Research. https://doi.org/10.5065/A1Z4-EE71. Accessed 12 October 2025.

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