Hi The sentence "All ADC data are public domain..." expresses clearly that the data do not have, and do not need, a License to be redistributed.
Please see https://lists.debian.org/debian-devel/2011/07/msg00506.html which fits almost exactly the case for these original data. Also, please see the definition of Public Domain on http://www.gnu.org/philosophy/categories.en.html where it reads: >Public domain software > >Public domain software is software that is not copyrighted. If the source code is in the public domain, that is a special case of noncopylefted free software, which means that some copies or modified versions may not be free at all. > >In some cases, an executable program can be in the public domain but the source code is not available. This is not free software, because free software requires accessibility of source code. Meanwhile, most free software is not in the public domain; it is copyrighted, and the copyright holders have legally given permission for everyone to use it in freedom, using a free software license. > >Sometimes people use the term “public domain” in a loose fashion to mean “free” or “available gratis.” However, “public domain” is a legal term and means, precisely, “not copyrighted”. For clarity, we recommend using “public domain” for that meaning only, and using other terms to convey the other meanings. > >Under the Berne Convention, which most countries have signed, anything written down is automatically copyrighted. This includes programs. Therefore, if you want a program you have written to be in the public domain, you must take some legal steps to disclaim the copyright on it; otherwise, the program is copyrighted. Thus, Public Domain is a perfectly aceptable legal status for the original data, that allowed the original KStars developers to download, modify, relicense and redistribute the data. Package is fully distributable by Debian. Regards
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