| Name | Resolution | Coverage | Pros | Cons |
|---|
| GTOPO30 (aka "USGS") | ~ 900m | Global | - Used by various operational models
- No gaps
| - Low resolution
- Some glitches at high latitudes
- Missing small islands
- Some known errors (e.g. "ghost" mountain in BC)
- Bad choice for Z0 of grids under 10Km resolution
|
| USNAVY | ~ 18.5 Km | Global | |
|
GMTED2010
(GMTED30)(GMTED15)(GMTED75) | ~1km (GMTED30),
~500m (GMTED15), ~250m (GMTED75) | -56<lat<+84
Only product MEAN30 has Antarctica and Greenland | - Available at 3 spatial resolutions
| - Tested by few users
- Missing Antarctica and Greenland for all products except MEAN of GMTED30
- Original data all have a square area with 0 as value in lake Superior, this has been repaired by replacing 0 with value=height of lake.
|
| SRTM-DEM | ~ 30m for v3.0
(90m for SRTMv4) | -60<lat<+60 | | - High latitudes missing
- Tested by few users
|
| ASTER GDEM | ~ 30m | -83<lat<+83 | | - “Experimental” or “research grade” product
- Tested by few users
|
| CDED250 | ~ 90m | Canada | | |
| CDED50 | ~ 20m | Canada | | |
| CDEM | ~ 20m | Canada | | |
