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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) Digital Elevation Model (DEM) version 1 (NASADEM_HGT) dataset, which provides global elevation data at 1 arc second spacing.

NASADEM data products were derived from original telemetry data from the Shuttle Radar Topography Mission (SRTM), a collaboration between NASA and the National Geospatial-Intelligence Agency (NGA), as well as participation from the German and Italian space agencies. SRTM's primary focus was to generate a near-global DEM of the Earth using radar interferometry. It was a primary component of the payload on space shuttle Endeavour during its STS-99 mission, which was launched on February 11, 2000, and flew for 11 days.

In addition to Terra Advanced Spaceborne Thermal and Reflection Radiometer (ASTER) Global Digital Elevation Model (GDEM) Version 2 data, NASADEM also relied on Ice, Cloud, and Land Elevation Satellite (ICESat) Geoscience Laser Altimeter System (GLAS) ground control points of its lidar shots to improve surface elevation measurements that led to improved geolocation accuracy. Other reprocessing improvements include the conversion to geoid reference and the use of GDEMs and Advanced Land Observing Satellite Panchromatic Remote-sensing instrument for Stereo Mapping (PRISM) AW3D30 DEM, and interpolation for void filling.

NASADEM are distributed in 1 degree latitude by 1 degree longitude tiles and consist of all land between 60° N and 56° S latitude. This accounts for about 80% of Earth's total landmass.

NASADEM_HGT data product layers include DEM, number of scenes (NUM), and an updated SRTM water body dataset (water mask). The NUM layer indicates the number of scenes that were processed for each pixel and the source of the data. A low-resolution browse image showing elevation is also available for each NASADEM_HGT granule.

The global 1 arc second NASADEM product is also available in NetCDF4 format as the NASADEM_NC dataset with the source of each elevation pixel in the corresponding NASADEM_NUMNC product.

Product Summary

Platforms
OV-105
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
C2763264762-LPCLOUD
Data State
COMPLETE
Number of Files/Granules
14520
Processing Level
3
Published
Updated
Science Keywords
Terrain Elevation ,
RADAR IMAGERY ,
Topographical Relief Maps

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. (2020). NASADEM Merged DEM Global 1 arc second V001 [Data set]. NASA Land Processes Distributed Active Archive Center. https://doi.org/10.5067/MEASURES/NASADEM/NASADEM_HGT.001 Date Accessed: 2026-05-30

File Naming Convention

s01w047.hgt

The file name begins with the latitude and longitude of the lower left corner of the tile (s01w047) followed by the File Extension/Variable (hgt).

Documents

Publications Citing This Dataset

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Title Year Author Topic
Leveraging Weekly Snow Cover Time Series for Improved Glacier Monitoring Aberle, Rainey, Enderlin, Ellyn M., Rounce, David R., ONeel, Shad, Tober, Brandon, Friel, Alexandra Terrain Elevation, RADAR IMAGERY, Topographical Relief Maps
Investigating glacier mass balance and driving factors of the Karakoram Zhou, Shuaibo, Sun, Zhangli, Xie, Jinpeng, Zhao, Fanyu, Huang, Kaihong, Wang, Hangtong, Yang, Chenxi Terrain Elevation, RADAR IMAGERY, Topographical Relief Maps
The impact of urban landscape patterns on land surface temperature at the street block level: Evidence from 38 big Chinese cities Zhang, Anqi, Li, Weifeng, Xia, Chang, Guo, Huagui Terrain Elevation, RADAR IMAGERY, Topographical Relief Maps
The Application of Remote Sensing Data (SAR, Thermal and Optical) and Geodetic Modeling to Investigate the Volcanic Activity at Semeru Volcano (Indonesia) Galetto, Federico, Reale, Diego, Coppola, Diego, Sansosti, Eugenio, Pritchard, Matthew E. Terrain Elevation, RADAR IMAGERY, Topographical Relief Maps
Statewide Forest Canopy Cover Mapping of Florida Using Synergistic Schlickmann, Monique Bohora, Bueno, Inacio Thomaz, Valle, Denis, Hammond, William M., Prichard, Susan J., Hudak, Andrew T., Klauberg, Carine, Karasinski, Mauro Alessandro, Brock, Kody Melissa, Rocha, Kleydson Diego, Xia, Jinyi, Vieira Leite, Rodrigo, Higuchi, Pedro, da Silva, Ana Carolina, Maximo da Silva, Gabriel, Cova, Gina R., Silva, Carlos Alberto Terrain Elevation, RADAR IMAGERY, Topographical Relief Maps
Spectral gravity forward modelling of 3D variable densities using an arbitrary integration radius with application to lunar topographic masses Bucha, Blazej Terrain Elevation, RADAR IMAGERY, Topographical Relief Maps
Streamflow forecasting in ungauged basins with CNN-LSTM and radar-based Lee, Jeonghun, Chung, Eun-Sung, Kim, Soohyun, Kim, Dongkyun Terrain Elevation, RADAR IMAGERY, Topographical Relief Maps
Corrigendum to Streamflow forecasting in ungauged basins with CNN-LSTM and radar-based precipitation [J. Hydro-environ. Res. 6061 (2025) 100666] (Journal of Hydro-environment Research (2025) 6061, (S157064432500019X), (10.1016/j.jher.2025.100666)) Lee, Jeonghun, Chung, Eun-Sung, Kim, Soohyun, Kim, Dongkyun Terrain Elevation, RADAR IMAGERY, Topographical Relief Maps
Simulation of Land Cover Change Impacts on Discharge and Sedimentation in Merawu Catchment, Indonesia Fitra, Fauzia Zakira, Marhaento, Hero, Ulhaq, Muhammad Fathi Dhiya Terrain Elevation, RADAR IMAGERY, Topographical Relief Maps
Spatiotemporal patterns and drivers of Chl-a in Chinese lakes between 1986 and 2023 Liu, Chang, Zhu, Fangfang, Yan, Xingguang, Ma, Xiaoliang, Yang, Di, Smith, Andrew Robert Land Surface Temperature, Emissivity, Terrain Elevation, RADAR IMAGERY, Topographical Relief Maps
Relative effects of sacred forests and protected areas on forest Peereman, Jonathan, Aiba, Masahiro, Lin, TengChiu Terrain Elevation, RADAR IMAGERY, Topographical Relief Maps
Robust strategies for forest wildfire mitigation under uncertainty Hildemann, Moritz, Pludow, Amelia B., Murray, Alan T., Pebesma, Edzer, Verstegen, Judith A. Terrain Elevation, RADAR IMAGERY, Topographical Relief Maps
Remote sensing and field data show complementary functions when Trinco, Fabio Daniel, Rusch, Veronica Elena, Cardozo, Andrea, Varela, Santiago Agustin, Garibaldi, Lucas Alejandro, Tittonell, Pablo Adrian Terrain Elevation, RADAR IMAGERY, Topographical Relief Maps
Subtropical vegetation damage and recovery dynamics after the great 2008 Xiong, Yujiu, Yan, Wenjie, Wang, Xu, Luo, Yong, Feng, Hanhua, Zhao, Wenli, Zhu, Biqing, Ye, Zhenhua, Li, Hao Vegetation Index, Normalized Difference Vegetation Index (NDVI), Enhanced Vegetation Index (EVI), Photosynthesis, Primary Production, Vegetation Productivity, Terrain Elevation, RADAR IMAGERY, Topographical Relief Maps
Response of Vegetation Phenology to Seasonal Land Surface Temperature in the Beijing-Tianjin-Hebei Region under Urbanization Background Zhang, Jinbing, Zhang, Pengyan, Liu, Zhenyue, Yang, Dan, Li, Mengyu Land Use/Land Cover Classification, Plant Phenology, Enhanced Vegetation Index (EVI), Terrain Elevation, RADAR IMAGERY, Topographical Relief Maps, Land Surface Temperature, Emissivity
Reserve asset or empty promise? Revealing the role of new croplands for improving food production potential in China Chen, Hang, Xia, Hao, Ding, Guanqiao, Tan, Yongzhong, Xiao, Wu, Prishchepov, Alexander V. Terrain Elevation, RADAR IMAGERY, Topographical Relief Maps
Rice farming mediated internal competition and reduced external risks Chen, Xiaolong, Liu, Yan, Zhao, Xiaoshuang, Liu, Shihao, Zhao, Ning, Lai, Xiaohe, Chen, Jing, Li, Maotian, Sun, Qianli Terrain Elevation, RADAR IMAGERY, Topographical Relief Maps
Watershed sediment cascades across multiple timescales: Causal Yue, Z.J., Wang, N.N., Xiao, H.B., Shi, Z.H. Terrain Elevation, RADAR IMAGERY, Topographical Relief Maps
Validating recent global canopy height maps over China's forests based Chen, Ang, Cheng, Kai, Chen, Yuling, Qi, Zhiyong, Yang, Haitao, Ren, Yu, Yang, Zekun, Chen, Mengxi, Xu, Jiachen, Zhang, Yixuan, Huang, Guoran, Xiang, Tianyu, Zhang, Junmin, Liu, Weiyan, Lin, Danyang, Xu, Guangcai, Guo, Qinghua Plant Phenology, Canopy Characteristics, Vegetation Cover, Lidar, Topography, Vegetation Height, Terrain Elevation, RADAR IMAGERY, Topographical Relief Maps
Unlocking drought in pistachio orchards: monitoring and forecasting using landsat time series and machine learning techniques Zarei, Neda, Latifi, Hooman, Hosseininaveh, Ali Terrain Elevation, RADAR IMAGERY, Topographical Relief Maps, Terrestrial Water Storage
Upscaling Frameworks Drive Prediction Accuracy and Uncertainty When Mapping Aboveground Biomass Density from the Synergism of Spaceborne LiDAR, SAR, and Passive Optical Data Bueno, Inacio T., Silva, Carlos A., Schlickmann, Monique B., Donovan, Victoria M., Atkins, Jeff W., Brock, Kody M., Xia, Jinyi, Valle, Denis R., Qiu, Jiangxiao, Vogel, Jason, Susaeta, Andres, Sharma, Ajay, Klauberg, Carine, Mohan, Midhun, Dalla Corte, Ana Paula Terrain Elevation, RADAR IMAGERY, Topographical Relief Maps
Tourist Adaptation to Environmental Change: Evidence from Gangshika Lu, Rongzhu, Wang, Yixin, Liu, Jinqiao, Wang, Yuchen, Yang, Dan, Jiang, Yan, Zhao, Xiaoyang, Zhao, Liqiang, Wang, Naiang Terrain Elevation, RADAR IMAGERY, Topographical Relief Maps
Topographic effects on vegetation greening and area expansion in global alpine zones under climate change Zou, Linqing, Tian, Feng, Liang, Tianchen, Fensholt, Rasmus, He, Tao, Schaepman-Strub, Gabriela Terrain Elevation, RADAR IMAGERY, Topographical Relief Maps
Phenology-Optimized Drought Index Reveals the Spatio-Temporal Patterns of Vegetation Health and Its Attribution on the Loess Plateau Yue, Zichen, Zhong, Shaobo, Wang, Wenhui, Mei, Xin, Huang, Yunxin Vegetation Index, Normalized Difference Vegetation Index (NDVI), Enhanced Vegetation Index (EVI), Photosynthesis, Primary Production, Vegetation Productivity, Land Surface Temperature, Emissivity, Terrain Elevation, RADAR IMAGERY, Topographical Relief Maps
Pervasive aquatic vegetation organic carbon losses in China's lakes Cao, Zhen, Lai, Lai, Zhang, Yuchao, Chen, Xi, Yang, Qiduo, Wu, Shuimu, Jiang, Fahui Terrain Elevation, RADAR IMAGERY, Topographical Relief Maps
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