GTOPO30
Global 30 Arc Second Elevation Data Set
Representative applications of GTOPO30
HYDRO 1K: Elevation Derivative Database
Click on an area of the map to preview or download data.
GTOPO30 is a global digital elevation model (DEM) 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 which
can be selected from the map shown above. 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 EROS Data Center (EDC). The following organizations participated by contributing
funding or source data: the National Aeronautics and Space Administration (NASA), the United Nations Environment Programme/Global Resource Information Database (UNEP/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).
edcweb@edcwww.cr.usgs.gov