The multi spectral data is held on two files, called Site 005 1992_reduced.img and Site 020 1992_reduced.img. These need to be downloaded and saved to your hard disk before continuing with the next step. Although the images are georeferenced, these files have had the co-ordinate information removed, in order to protect the sites from illegal metal detecting.
Two files in csv (comma separated file format) containing the data as (x, y, value) have been included for those of you who wish to reprocess the data from the sample areas. These are Site 005_xyz_magnetic_data.zip and Site 020_xyz_magnetic_data.zip. Both files have been zipped to enhance download speeds. The original data was collected at 25cm by 1m resolution, although this has been interpolated to 25cm by 25cm in the download files.