1 text/xml image/tiff image/png image/png24 image/png32 image/bmp image/gif image/jpeg image/svg image/bil XML INIMAGE BLANK 0 A grid of BigT (total magnetic field magnitude) for the Saint John 1987 survey.This dataset represents BigT, the total magnetic field magnitude, for the Saint John airborne magnetic survey in southern New Brunswick. BigT is calculated by converting total magnetic intensity (TMI) to magnetic field components (X, Y, Z) and computing the vector magnitude, providing a clear overview of magnetic anomalies and sources. The dataset is provided in NB Stereographic Double, NAD83.The BigT grid was created from the Saint John 1987 survey by microlevelling the TMI (Mag_Miclev), converting it to magnetic field components, and calculating the vector magnitude (√(X² + Y² + Z²)). The final grid is provided in NB Stereographic Double, NAD83.Data created Sept 2025. CRS:84 EPSG:4326 EPSG:2953 -66.571206-65.66500445.00027945.854634