- Total Magnetic Field Intensity Grid – Geosoft Format:
Geosoft Grid Format - Total Magnetic Field Intensity Grid – ASCII Format::
ASCII Text Format
- Scale: 1:50,000
- Region: NW – Chad Basin
Please note that the sample downloaded data only covers 1:50,000, i.e. a quadrant of 1:100,000. The remaining data can be purchased from Nigerian Geological Survey after formal request