| DEM | SD Before Removing Outliers | SD After Removing Outliers | Improvement% |
| SRTM 1 | ±2.6 | ±2.4 | 7.7% |
| SRTM 3 | ±2.8 | ±2.4 | 16.5% |
| EarthEnv-DEM90 | ±2.1 | ±1.9 | 9.4% |
| GTOPO30 | ±6.8 | ±6.7 | 0.9% |
| GMTED2010 | ±2.7 | ±2.4 | 11.4% |
| ASTER | ±5.7 | ±5.2 | 8.5% |
| GLOBE | ±6.6 | ±6.6 | 0% |
| AW3D30 | ±2.4 | ±2.0 | 14.8% |