DTED Comparison¶
DTED Resolution¶
| Level | SRTM | DTED Post Spacing | Horizontal Accuracy (CE90) | Vertical Accuracy (LE90) | Row x Column |
|---|---|---|---|---|---|
| Level 0 | N/A | 30 arc-seconds (900 m) | 121 x 121 | ||
| Level 1 | 3 arc-seconds (~90 m) | 3 arc-seconds (100 m) | 50 m | 30 m | 1200 x 1200 |
| Level 2 | 1 arc-second (~30 m) | 1 arc-second (30 m) | 23 m | 18 m | 3600 x 3600 |
| Level 3+ | Not applicable | Higher-res, varies |
Comparison with TPC DTED Stream Server¶
ATAK's default DTED data source is the TPC's DTED Stream Server at TAK.gov, which provides DTED0 (90 m/295 ft) files:
"TPC provides DTED0 for four corners of the hemisphere via downloadable .zip files that contain uncompressed DTED files." Source: tak.gov
The "Four Corners" refer to the Earth's hemispheres:
- North West (NW) (includes CONUS)
- North East (NE)
- South West (SW)
- South East (SE)