Generating a 3D map from terrain-corrected geophysical potential field data

摘要

The method comprises inputting terrain-corrected potential field data (gravity or e.m. field data) for said surveyed region, said potential field data comprising data for a range of spatial wavelengths, wherein geological features at different depths in the surveyed region are associated with different wavelengths in said range of wavelengths; filtering said potential field data by spatial wavelength to generate a first plurality of filtered sets of potential field data, each relating to a respective wavelength or range of wavelengths, thus targeting geological features at a different respective said depth; processing each said filtered set of potential field data to identify a set of spatial features comprising one or both of line spatial features and point spatial features in each said filtered set of potential field data, and then to generate a set of plot data for each said filtered set of potential field data, a said set of plot data representing said identified set of spatial features for a said depth targeted by said filtering; and finally combining said sets of plot data to generate three-dimensional map data providing a three-dimensional representation of said underlying geology of said surveyed region.