NASADEM Merged DEM Source Global 1 arc second nc V001

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_NC) 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 3 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° by 1° tiles and consist of all land between 60° N and 56° S latitude. This accounts for about 80% of Earth’s total landmass.

NASADEM_NC data product layer includes DEM. The NASADEM_NCNUM layer indicates the number of scenes that were processed for each pixel and the source of the data.

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.

Data and Resources

Field Value
accessLevel public
bureauCode {026:00}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_@id https://data.nasa.gov/data.json
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
citation Archived by National Aeronautics and Space Administration, U.S. Government, LP DAAC. https://doi.org/10.5067/MEASURES/NASADEM/NASADEM_NUMNC.001.
graphic-preview-description Browse image for Earthdata Search
graphic-preview-file https://e4ftl01.cr.usgs.gov//WORKING/BRWS/Browse.001/2018.09.13/NASADEM_NUMNC_n16e095.1.jpg?_ga=2.218789209.1391794668.1578923852-2066674673.1574795892
identifier C1546314584-LPDAAC_ECS
issued 2018-09-06
landingPage https://doi.org/10.5067/MEASURES/NASADEM/NASADEM_NUMNC.001
language {en-US}
metadata_type geospatial
modified 2000-02-21
programCode {026:001}
publisher LP DAAC
resource-type Dataset
source_datajson_identifier true
source_hash 73650003e4dece9b46aee8809e1e3267282690a5
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-180.0, -56.0], [180.0, -56.0], [180.0, 60.0], [-180.0, 60.0], [-180.0, -56.0]]]}
temporal 2000-02-11T00:00:00Z/2000-02-21T23:59:59Z
theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • ckan
  • earth-science
  • geo
  • geoss
  • land-surface
  • national
  • north-america
  • radar
  • spectral-engineering
  • topography
  • united-states
isopen False
license_id notspecified
license_title License not specified
maintainer undefined
maintainer_email lpdaac@usgs.gov
metadata_created 2025-11-22T07:32:36.044877
metadata_modified 2025-11-22T07:32:36.044881
notes 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_NC) 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 3 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° by 1° tiles and consist of all land between 60° N and 56° S latitude. This accounts for about 80% of Earth’s total landmass. NASADEM_NC data product layer includes DEM. The NASADEM_NCNUM layer indicates the number of scenes that were processed for each pixel and the source of the data. 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.
num_resources 9
num_tags 13
title NASADEM Merged DEM Source Global 1 arc second nc V001