| S/N0 | Data | Sources |
| 1 | Terrestrial Bouguer gravity | Nigerian Geological Survey Agency (NGSA) |
| 2 | Computed Bouguer gravity | ICGEM website |
| 3 | Terrestrial DEM | Enugu State ministry of lands and surveys |
| 4 | Reference DEM | ICGEM website |
| 5 | Global Gravity Field Models (GGMs) | ICGEM website |