Global 30-Arc-Second Elevation Data (GTOPO30)
Title
Global 30-Arc-Second Elevation Data (GTOPO30)
Description
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. See linked index for help in choosing an area.
Identifier
/NAP/UT/422.xml
2970418859
Collection
Geospatial
Production Date
1996
Data Type
grid
Geographic Keywords
International
Notes
Keywords
DIGITAL ELEVATION MODEL
ELEVATION
DATA SOURCES
Time Period
1996
Coordinate System
4269, http://www.epsg-registry.org/
Producer
USGS
Citation
“Global 30-Arc-Second Elevation Data (GTOPO30),” MDL Data, accessed January 22, 2026, https://mdl-data.library.utoronto.ca/items/show/519.