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Description

The Land Processes Distributed Active Archive Center (LP DAAC) is responsible for the archive and distribution of NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) SRTM, which includes the global 30 arc second (~1,000 meter) product.

The NASA SRTM product with sample spacing of 3 arc second (~90 meter) generated by a 3 X 3 averaging of the 1 arc second data are then 10 X 10 averaged to produce thirty 30 arc second (~1,000 meter) data to correspond with Global 30 Arc Second Elevation (GTOPO30). (See the User Guide Section 2.1.4)

The NASA SRTM data sets result from a collaborative effort by the National Aeronautics and Space Administration (NASA) and the National Geospatial-Intelligence Agency (NGA - previously known as the National Imagery and Mapping Agency, or NIMA), as well as the participation of the German and Italian space agencies. This collaboration aims to generate a near-global digital elevation model (DEM) of Earth using radar interferometry. SRTM was the primary (and virtually only) payload on the STS-99 mission of the Space Shuttle Endeavour, which launched February 11, 2000 and flew for 11 days.

The SRTM swaths extended from ~30 degrees off-nadir to ~58 degrees off-nadir from an altitude of 233 kilometers (km), creating swaths ~225 km wide, and consisted of all land between 60° N and 56° S latitude to account for 80% of Earth's total landmass.

Known Issues

  • SRTMGL30 is Version 2.1 and has not been updated for the NASA SRTM V3.0 release as described in the User Guide.
  • Known issues in the NASA SRTM are described in the following publication:

Improvements/Changes from Previous Version

  • Editing, spike and pit removal, waterbody leveling, and coastline definition.

Version Description

Well-defined water bodies and coastlines, absence of spikes and wells with areas of voids, and recalculates SRTM 90m sample spacing made by 3x3 averaging of full resolution edited data and elimination of vertical 'banding' from V2.

Product Summary

Platforms
STS-99
Instruments
SRTM
Spatial Extent
N: 60 S: -56 E: 180 W: -180
Spatial Resolution
1000 Meters x 1000 Meters
Geographic Region
GLOBAL LAND
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2000-02-11 to 2000-02-21
Temporal Resolution
11 Day
Data Partner
Land Processes Distributed Active Archive Center (LP DAAC)
Shuttle Radar Topography Mission Project Office, Jet Propulsion Laboratory, NASA (NASA/JPL/SRTM)
Concept ID
C2763266346-LPCLOUD
Data State
COMPLETE
Processing Level
3
Published
Updated
Science Keywords
RADAR IMAGERY,
Terrain Elevation,
Digital Elevation/Terrain Model (DEM)

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

NASA JPL. (2013). NASA Shuttle Radar Topography Mission Global 30 arc second [Data set]. NASA Land Processes Distributed Active Archive Center. https://doi.org/10.5067/MEASURES/SRTM/SRTMGL30.002 Date Accessed: 2025-11-02

File Naming Convention

w020n90.dem

The file name begins with the latitude and longitude of the lower left corner of the tile (w020n90) followed by the Product Short Name (SRTMGL30), and the Data Format (dem).

Documents

Publications Citing This Dataset

Filters
Title Year Author
Landslide susceptibility assessment using AHP model and multi resolution DEMs along a highway in Manipur, India Chanu, M. L.
Sensitivity of pollutant concentrations to the turbulence schemes of a dispersion modelling chain over complex orography Bellini, A.
Spatial patterns and driving factors of aboveground and belowground biomass over the eastern Eurasian steppe Ding, L.
Retrieval of solar-induced chlorophyll fluorescence (SIF) from satellite measurements—Comparison of SIF between TanSat and OCO-2 Yao, L.
Ancient DNA and deep population structure in sub-Saharan African foragers Lipson, M.
Modeling streamflow at the Iberian Peninsula scale using MOHID-Land—Challenges from a coarse scale approach Oliveira, A. R.
Geographical accessibility to the supply of antiophidic sera in Brazil—Timely access possibilities Oliveira, R. A. D.
Real vehicle fuel consumption in logistic corridors Huertas, J. I.
All-sky 1 km MODIS land surface temperature reconstruction considering cloud effects based on machine learning Cho, D.
Development of a new index for automated mapping of ratoon rice areas using time-series normalized difference vegetation index imagery Li, B.
SHOWING 10 OF 119

Variables

Variables are a set of physical properties whose values determine the characteristics or behavior of something. For example, temperature and pressure are variables of the atmosphere. Parameters and variables can be used interchangeably. Variable level attributes provide individual information for each variable.

The Name in this table is the variable name. Fill value indicates missing or undefined data points in a variable. Valid range is the range of values the variable can store. Scale factor is used to increase or decrease the size of an object and can be used to correct for distortion. For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor
DEM Elevation Meters int16 -32768 -32768 to 32767 N/A
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