avdata is a set of tools for extracting usefully formatted data from US FAA aeronav and NGS published data. It provides a library for great circle navigation, magnetic variation, and quickly finding the nearest airport, navaid, or fix.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.
