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Description

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

NASA Shuttle Radar Topography Mission (SRTM) datasets 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. The purpose of SRTM was to generate a near-global digital elevation model (DEM) of the Earth using radar interferometry. SRTM was a primary component of the payload on the Space Shuttle Endeavour during its STS-99 mission. Endeavour launched February 11, 2000 and flew for 11 days.

SRTM collected data in swaths, which extend from ~30 degrees off-nadir to ~58 degrees off-nadir from an altitude of 233 kilometers (km). These swaths are ~225 km wide, and consisted of all land between 60° N and 56° S latitude. This accounts for about 80% of Earth's total landmass.

Each SRTMGL1 data tile contains a mosaic and blending of elevations generated by averaging all "data takes" that fall within that tile. These elevation files use the extension ".HGT", meaning height (such as N37W105.SRTMGL1.HGT). The primary goal of creating the Version 3 data was to eliminate voids that were present in earlier versions of SRTM data. In areas with limited data, existing topographical data were used to supplement the SRTM data to fill the voids. The source of each elevation pixel is identified in the corresponding SRTMGL1N product (such as N37W105.SRTMGL1N.NUM).

The global 1 arc second SRTM product is also available in NetCDF4 format as the SRTMGL1_NC dataset with the source of each elevation pixel in the corresponding SRTMGL1_NUMNC product.

Known Issues

  • Known issues in the NASA SRTM are described in the following publication:

Version Description

The following improvement was implemented for SRTM Version 3 data products: Missing data or voids were filled with ASTER Global Digital Elevation Model (GDEM) Version 2, the Global Multi-resolution Terrain Elevation Data 2010 (GMTED2010), or the National Elevation Dataset (NED).

Product Summary

Platforms
STS-99
Instruments
SRTM
Spatial Extent

N: 60 S: -56 E: 180 W: -180

Spatial Resolution
30 Meters x 30 Meters
Location
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
C2763266360-LPCLOUD
Data State
COMPLETE
Number of Files/Granules
14297
Processing Level
3
Published
Updated
Science Keywords
RADAR IMAGERY ,
Terrain Elevation ,
Topographical Relief Maps ,
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 1 arc second [Data set]. NASA Land Processes Distributed Active Archive Center. https://doi.org/10.5067/MEASURES/SRTM/SRTMGL1.003 Date Accessed: 2026-05-18

File Naming Convention

N26W077.hgt

The file name begins with the latitude and longitude of the lower left corner of the tile (N26W077) followed by the Data Format (hgt).

Documents

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Publications Citing This Dataset

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Title Year Author Topic
Assessing the geothermal prospect of the West Coast Geothermal Province Dudhate, Amar Prakashrao, Ray, Labani, Kurakalva, Rama Mohan, Chopra, Nishu, Maurya, Ved Prakash, Podugu, Nagaraju RADAR IMAGERY, Terrain Elevation, Digital Elevation/Terrain Model (DEM), Topographical Relief Maps
Comparative analysis of slope and grid units for co-seismic landslide susceptibility mapping using machine learning methods Bhattarai, Tulasi Ram, Bhandary, Netra Prakash RADAR IMAGERY, Terrain Elevation, Topographical Relief Maps, Digital Elevation/Terrain Model (DEM)
PhysicsConstrained Network for Enhanced ExtendedRange Precipitation Forecasting in East Asia Wang, Yudan, Chen, Huimin, Wu, Hao, Liu, Jane, Yuan, Huiling, Cao, Shuya, Wang, Tijian, Zhuang, Bingliang RADAR IMAGERY, Terrain Elevation, Topographical Relief Maps, Digital Elevation/Terrain Model (DEM), Precipitation, Precipitation Amount, Precipitation Rate, Snow, Rain
Predicting the spatial distribution of vegetation alliances with ecological knowledge under sample-limited conditions Zhao, Fang-He, Jia, Ningxia, Guo, Ke, Zhu, A-Xing, Qin, Cheng-Zhi RADAR IMAGERY, Terrain Elevation, Topographical Relief Maps, Digital Elevation/Terrain Model (DEM)
Reduced future summer water availability in the Tien Shan due to Glacier wastage Van Tricht, Lander, Zekollari, Harry, Huss, Matthias, van Tiel, Marit, Vanderkelen, Inne, Aguayo, Rodrigo, Compagno, Loris, Thiery, Wim, Huybrechts, Philippe, Farinotti, Daniel Terrain Elevation, RADAR IMAGERY, Topographical Relief Maps, Digital Elevation/Terrain Model (DEM)
Same/Other/All K-Fold Cross-Validation for Estimating Similarity of Hocking, Toby Dylan, Thibault, Gabrielle, Bodine, Cameron Scott, Arellano, Paul Nelson, Shenkin, Alexander F., Lindly, Olivia Jasmine RADAR IMAGERY, Terrain Elevation, Topographical Relief Maps, Digital Elevation/Terrain Model (DEM)
Satellite Embedding-Based Population Imputation for Areas with Missing Building Footprint Data: A Computer Vision-Based Approach Jeong, Byeonghwa, Adams, Daniel, Zimmer, Andrew, Urban, Marie RADAR IMAGERY, Terrain Elevation, Topographical Relief Maps, Digital Elevation/Terrain Model (DEM)
Satellite-Based Fraction of Available Water Reveals Soil Moisture Deficits Preceding Major Wildfires Goffin, Benjamin D., Fernandez, Alfonso, Etchanchu, Jordi, Fang, Bin, Lakshmi, Venkataraman Vegetation Water Content, Soil Moisture/Water Content, Skin Temperature, Fire Ecology, Biomass Burning, Wildfires, Fire Occurrence, Burned Area, RADAR IMAGERY, Terrain Elevation, Digital Elevation/Terrain Model (DEM), Land Use/Land Cover Classification, Topographical Relief Maps, Plant Phenology, Enhanced Vegetation Index (EVI), Brightness Temperature, Surface Soil Moisture, SIGMA NAUGHT
Seismic site characterization using satellite-derived terrain Thakur, Harish, Anbazhagan, P. RADAR IMAGERY, Terrain Elevation, Topographical Relief Maps, Digital Elevation/Terrain Model (DEM)
Sequential Residual Learning for Path Loss and Shadowing Prediction Using Multimodal Data Lee, Dongyeob, Noh, Eonsu RADAR IMAGERY, Terrain Elevation, Topographical Relief Maps, Digital Elevation/Terrain Model (DEM)
Smooth surface reconstruction of earthquake faults from distributed moment-potency-tensor solutions Sato, Dye S K, Yagi, Yuji, Okuwaki, Ryo, Fukahata, Yukitoshi RADAR IMAGERY, Terrain Elevation, Topographical Relief Maps, Digital Elevation/Terrain Model (DEM)
Runoff Potential Index (RPI): 3D modelling of surface-driven hydrological dynamics for drought resilience Correa, Edgar S. RADAR IMAGERY, Terrain Elevation, Topographical Relief Maps, Digital Elevation/Terrain Model (DEM)
Decadal scale fire dynamics in savannas and forests of the Nilgiri Biosphere Reserve, India Rajashekar, Pradyumna, Krishnan, Aparna, Varma, Varun, Ratnam, Jayashree, Sankaran, Mahesh, Lehmann, Caroline E. R. RADAR IMAGERY, Terrain Elevation, Topographical Relief Maps, Digital Elevation/Terrain Model (DEM)
Decarbonizing high-speed rail infrastructure in China: An integrated Guo, Guisong, Zhu, Chen, Mao, Ruichang, Li, Xiaodong, Wu, Yankun, Chen, Jian RADAR IMAGERY, Terrain Elevation, Topographical Relief Maps, Digital Elevation/Terrain Model (DEM)
Comparison of CMIP6 GCMs historical precipitation with measured precipitation over Pakistan Abbas, Adnan, Ullah, Waheed, Ullah, Safi, Bhatti, Asher Samuel, Waseem, Muhammad, Ali, Gohar, Xu, Dayong RADAR IMAGERY, Terrain Elevation, Topographical Relief Maps, Digital Elevation/Terrain Model (DEM)
Detection and Classification of Land for Coffee Cultivation in El Salvador Using Artificial Intelligence and Clustering Techniques Parada, Gabriela L. Rodriguez, Lopez, Alejandra Del C. Ponce, De Jimenez, Evelyn L. Hernandez RADAR IMAGERY, Terrain Elevation, Topographical Relief Maps, Digital Elevation/Terrain Model (DEM)
Detection of Crustal Deformation Using a Gravimetric and Multitemporal Interferometric SAR (MT-InSAR) Approach Daramola, Olagoke E., Epuh, Emeka E., Okolie, Chukwuma J., Arungwa, Ikenna D., Apeh, Ojima I., Fatoyinbo, Ahmed, Akinnusi, Samuel, Orji, Michael J., Tenzer, Robert Surface Pressure, Heat Flux, Longwave Radiation, Shortwave Radiation, Surface Temperature, Humidity, Evapotranspiration, Surface Winds, Rain, Precipitation Rate, Snow, Soil Moisture/Water Content, Soil Temperature, Land Surface Temperature, Snow Water Equivalent, Runoff, RADAR IMAGERY, Terrain Elevation, Topographical Relief Maps, Digital Elevation/Terrain Model (DEM)
Depositional conditions affecting proximal to distal variation in the Sarin, Tarang, Banerjee, Santanu, Mohammed, Ibrahim Q., Zaki, Nibras, Farouk, Sherif, Mansurbeg, Howri, Singh, Pragya RADAR IMAGERY, Terrain Elevation, Topographical Relief Maps, Digital Elevation/Terrain Model (DEM)
Deep transfer learning for spatiotemporal mapping of PM2.5 nitrate Zheng, Xi, Meng, Haiyan, Zhao, Zixiang, Liu, Xinyi, Zhou, Li, Grieneisen, Michael L., Zhang, Han, Zhan, Yu, Yang, Fumo Aerosols, Aerosol Extinction, Aerosol Optical Depth/Thickness, Angstrom Exponent, Aerosol Particle Properties, Carbonaceous Aerosols, Dust/Ash/Smoke, Organic Particles, Sulfate Particles, Sulfur Oxides, Sulfur Compounds, Sulfate, Sulfur Dioxide, Sulfur Oxides, Particulate Matter, Dimethyl Sulfide, Black Carbon, Sea Salt, PARTICULATE MATTER (PM 2.5), PARTICULATE MATTER (PM 1.0), PARTICULATE MATTER (PM 10), RADAR IMAGERY, Terrain Elevation, Topographical Relief Maps, Digital Elevation/Terrain Model (DEM), Vegetation Index, Normalized Difference Vegetation Index (NDVI), Enhanced Vegetation Index (EVI)
Evaluating elk distribution and conflict under proposed management alternatives at the National Elk Refuge in Jackson, Wyoming Cotterill, Gavin G., Cross, Paul C., Cole, Eric K., Cook, Jonathan D., Mceachran, Margaret C., Graves, Tabitha A. RADAR IMAGERY, Terrain Elevation, Topographical Relief Maps, Digital Elevation/Terrain Model (DEM), Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
Euler inversion: locating sources of potential-field data through inversion of Euler's homogeneity equation Uieda, Leonardo, Souza-Junior, Gelson Ferreira, Uppal, India, Oliveira Jr, Vanderlei Coelho RADAR IMAGERY, Terrain Elevation, Topographical Relief Maps, Digital Elevation/Terrain Model (DEM)
Evaluation of CMIP6 GCM Performance in Simulating Historical Rainfall and Temperature Climatology of the Tana and North Gojjam SubBasins in the Upper Blue Nile Basin, Northwestern Ethiopia Shenkut, Abebe, Alemayehu, Getachew, Tesfaye, Kindie, Getnet, Mezgebu, Alemayehu, Yibekal, Mamo, Girma RADAR IMAGERY, Terrain Elevation, Topographical Relief Maps, Digital Elevation/Terrain Model (DEM)
FloodGenome: interpretable machine learning for decoding features shaping property flood risk predisposition in cities Liu, Chenyue, Mostafavi, Ali RADAR IMAGERY, Terrain Elevation, Topographical Relief Maps, Digital Elevation/Terrain Model (DEM)
Flood detection using PolSAR decomposition, feature selection, and deep learning Lee, Jinwook, Janizadeh, Saeid, Melancon, Alexander, Bateni, Sayed M., Kim, Dongkyun, Molthan, Andrew, Jun, Changhyun, Farhadiani, Ramin, Homayouni, Saeid, Dinka, Megersa RADAR IMAGERY, Terrain Elevation, Topographical Relief Maps, Digital Elevation/Terrain Model (DEM), Maximum/Minimum Temperature, 24 Hour Precipitation Amount, Snow Water Equivalent, Shortwave Radiation, Vapor Pressure
Hydrothermal activity of the Lake Abhe geothermal field (Djibouti): Structural controls and implications for geothermal exploration Walter, Bastien, Geraud, Yves, Favier, Alexiane, Chibati, Nadjib, Diraison, Marc, Magareh, Hassan Mohamed RADAR IMAGERY, Terrain Elevation, Topographical Relief Maps, Digital Elevation/Terrain Model (DEM)
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