Overview of Digital Elevation Model (DEM) datasets
A Digital Elevation Model (DEM) represents the elevation of the surface.
It is useful to distinguish between DSM and DTM.
In this repo, DEM is a generic term referring to either a DSM or a DTM. Note however that DEM is often also equated with DTM.
This graphic from Neon summarizes the differences well:
For a more detailed discussion, see Digital Elevation Models: Terminology and Definitions.
Dataset | Type | Horizontal resolution (m) | Vertical accuracy (m) | Data collection period | Method | Notes |
---|---|---|---|---|---|---|
ASTER GDEM V3 | DSM | 30 | 17 | 2000-2011 | Photogrammetry | |
SRTM DEM V3 | DSM | 30 USA, 90 outside | 9 | 2000 | InSAR | Coverage between 60° north and 56° south latitude |
NASADEM | DSM | 30 | 2000 | InSAR | Reprocessing of SRTM | |
AW3D30 | DSM | 30 | 5 | 2006-2011 | Photogrammetry | |
COPERNICUS GLO-30 | DSM | 30 | 4 | 2011-2015 | InSAR | Based on WorldDEM |
MERIT | DSM | 90 | 12 | 2000, 2006-2011 | InSAR + Photogrammetry | Created from SRTM + AW3D30 |
FABDEM | DTM | 30 | 1.12-2.88 (mean error) | 2011-2015 | InSAR | Used ML to remove buildings+trees from GLO-30 |
TanDEM-X 90m | DSM | 90 | 10 | 2010-2015 | InSAR |
Advanced Spaceborne Thermal Emission and Reflection satellite
Shuttle Radar Topography Mission
Coverage is only between 60° north and 56° south latitude
Reprocessing of SRTM
Comparison with CopernicusDEM in the Indus delta region
Based on WorldDEM/TanDEM-X
Does not cover areas around Azerbaijan and Armenia
Product comparison
Created by combining SRTM and ALOS Word 3D
DTM, processed GLO-30
License
See section below for more details.
The 90m version should be open for research use.
Collection of open and proprietary DEMs from Airbus (WorldDEM) and DLR (TanDEM-X)
5m
ETOPO1 is a 1 arc-minute global relief model of Earth's surface that integrates land topography and ocean bathymetry. Built from global and regional data sets, it is available in "Ice Surface" (top of Antarctic and Greenland ice sheets) and "Bedrock" (base of the ice sheets).
Global Multi-Resolution Topography Data Synthesis
GEBCO’s current gridded bathymetric data set, the GEBCO_2022 Grid, is a global terrain model for ocean and land, providing elevation data, in meters, on a 15 arc-second interval grid. It is accompanied by a Type Identifier (TID) Grid that gives information on the types of source data that the GEBCO_2022 Grid is based on.
Global Bathymetry and Topography
DSM, fusion of SRTM and ASTER GDEM
Used Ensemble Machine Learning with GEDI and ICESat-2 data to process available DSMs into a DTM
USGS 3D Elevation Program (3DEP)
DSM of the Arctic
Timestamped elevation model of the Arctic
DEMs, DSMs and point clouds for Australia
Coastal areas in mainland France, topographic and bathymetric information
DTM of France (including ultramarine territories). This DEM is updated each year with new acquisitions (usually lidar)
Ongoing LIDAR acquisition campaign
SwissALTI3D is an extremely precise digital elevation model which describes the surface of Switzerland without vegetation and development
High mountain asia glaciers
Lunar DEM created by the Lunar Reconnaissance Orbiter (LRO) mission. The data is available in several versions. A DEM covering the entire lunar surface at a resolution of 118m and a DEM of resolution 59m covering latitudes within ±60.
A partial DEM of Pluto with a resolution of 300m
A DEM of Mars with a resolution of 463m
A partial DEM of Pluto with a resolution of 300m
A DEM of Mercury with a resolution of 665m
A Dem of Venus with a resolution of 4641m