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| ID | Product | Surface | Spacing | Vertical reference | Accuracy context | Terms |
|---|---|---|---|---|---|---|
| E01 | USGS 3DEP 1-metre DEM | Bare earth | 1 metre | Usually NAVD88; regional exceptions require tile metadata | QL2-or-better lidar source; no per-tile accuracy established | US public domain (USGS-produced) |
| E02 | Copernicus GLO-30 DGED | DSM including buildings and vegetation | 1 arc-second; nominal 30 metres | EGM2008, EPSG:3855 | Product specification: absolute vertical <4 m LE90; not local validation | Copernicus DEM ESA–User Licence (instance-specific) |
| E03 | ALOS AW3D30 | DSM | Nominal 1 arc-second; longitude angular spacing increases at high latitudes | EGM96 orthometric | Quality fields supplied; no uniform measured local accuracy established | JAXA Terms of Use of Research Data |
| E04 | ArcticDEM 2-metre strips | DSM | 2 metres | WGS84 ellipsoid | Strips unregistered to ground control/altimetry | NextView / EOCL public DEM release exception |
| E05 | GEBCO 2026 grid | Land elevation and bathymetry | 15 arc-seconds | Assumed mean sea level; some source datums differ | Grid spacing is not source-data resolution or accuracy | Public domain (GEBCO terms of use) |
| E06 | USGS 3DEP 1/3-arc-second DEM | Bare-earth seamless terrain | 1/3 arc-second; approximately 10 m north–south | Usually NAVD88; local/NGVD29 exceptions outside CONUS | Varies by source project; no uniform local value established | US public domain (USGS-produced) |
| E07 | USGS 3DEP 1-arc-second DEM | Bare-earth seamless terrain | 1 arc-second; approximately 30 m north–south | Usually NAVD88; local/NGVD29 exceptions outside CONUS | Varies by source project; no uniform local value established | US public domain (USGS-produced) |
| E08 | USGS Alaska 5-metre IfSAR DEM | Bare-earth DTM | 5 metres | Tile metadata required; do not assume CONUS vertical datum | Not established for selected tile | US public domain (USGS-produced) |
| E09 | USGS Alaska IfSAR DSM | DSM; vegetation and structures included | 5 metres | Not established in inspected sources | Not established for selected tile | US public domain (USGS-produced) |
| E10 | Copernicus GLO-90 | DSM; buildings and vegetation retained | 3 arc-seconds; nominal 90 m | EGM2008 (EPSG:3855) | Product specification <4 m absolute vertical LE90; not local validation | Copernicus DEM ESA–User Licence (instance-specific) |
| E11 | Copernicus EEA-10 | DSM; buildings and vegetation retained | DGED 0.4 arc-second; INSPIRE nominal 10 m | EGM2008 (EPSG:3855) | Product specification <4 m absolute vertical LE90; not local validation | Copernicus DEM ESA–User Licence (instance-specific) |
| E12 | ArcticDEM mosaic | DSM mosaic | 2 m primary; coarser mosaics also offered | WGS84 ellipsoid | Mosaic registration and source coverage vary; no local benchmark here | NextView / EOCL public DEM release exception |
| E13 | REMA strips | DSM strips | 2 metres | WGS84 ellipsoid | Strips not registered to altimetry; mosaic claim does not apply | NextView / EOCL public DEM release exception |
| E14 | REMA mosaic | DSM mosaic | 2 m; reduced resolutions 10/32 m and whole-domain grids | WGS84 ellipsoid | Provider reports <1 m absolute uncertainty over most registered area; not local validation | NextView / EOCL public DEM release exception |
| E15 | NASADEM HGT | Radar-derived terrain/surface with merged fills; not universally bare earth | 1 arc-second | EGM96 geoid for merged HGT; SRTM-only float product differs | Reprocessed product; no single local accuracy guarantee | CC0 (unmarked NASA-led mission data; check exceptions) |
| E16 | SRTM GL1 v3 | Radar-derived elevation; vegetation/buildings may influence heights | 1 arc-second | EGM96 | USGS describes mission accuracy; no local validation here | CC0 (unmarked NASA-led mission data; check exceptions) |
| E17 | CGIAR SRTM 90 m | Void-filled SRTM-derived elevation | 3 arc-seconds; nominal 90 m at equator | Not established in inspected sources | Page reports source vertical error <16 m; not independent CGIAR/local validation | CIAT SRTM distribution terms |
| E18 | MERIT DEM | Error-reduced terrain estimate | 3 arc-seconds; nominal 90 m at equator | EGM96 geoid | Provider reports 58% of land better than 2 m after correction; not uniform accuracy | CC BY-NC 4.0 or ODbL 1.0 (choice; additional condition) |
| E19 | FABDEM | Terrain estimate with forest/building biases removed | Uniform 1 arc-second; approximately 30 m at equator | EGM2008 EPSG:3855 | No single numerical local accuracy claim established here | CC BY-NC-SA 4.0 (commercial permission separate) |
| E20 | ASTER GDEM v3 | Optical-stereo surface elevation | 1 arc-second; nominal 30 m at equator | EGM96 | Known inaccuracies/artifacts; no uniform accuracy guaranteed | NASA/METI data-use conditions; no separate licence established |