Title: Digitized aeromagnetic datasets for the conterminous United States, Hawaii, and Puerto Rico (Open-file report)
Description: From 1976 through 1999 Survey digitized analog magnetic maps for regions of U.S., filling in gaps not previously covered. This disc contains all files currently on record for U.S. Updates will be available as they are released on USGS anonymous FTP sites.
Subjects: Aeromagnetic prospecting