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USGS Mineral Resources On-line Spatial Data
Interactive maps and downloadable data for regional and global Geology, Geochemistry, Geophysics, and Mineral Resources. --USGS Users may browse by topics such as geologic... -
Geoscience Australia
A division of the Australian Government. This page provides free downloadable geophysical data for Australia.
E' possibile inoltre accedere al registro usando le API (vedi Documentazione API).