I think that things like formulae come under the rubric of ideas, basic concepts that cannot be copyrighted. Of course, a specific map created at a particular time, using a specific projection, is a thing that can be copyrighted. Ken Grabach Maps Librarian BEST Library, 219D Miami University Libraries Oxford, OH 45056 USA [log in to unmask] 513-529-1726 On Mon, Nov 7, 2016 at 6:02 PM, Jon Jablonski <[log in to unmask]> wrote: > I don’t think you can copyright a projection. > > > Jon Jablonski > Spatial Data Librarian, Map & Imagery Lab > Interim Director, Interdisciplinary Research Collaboratory > 805-893-4049 > UCSB Library > > > > > On Nov 7, 2016, at 1:37 PM, George Carhart <[log in to unmask] > <[log in to unmask]>> wrote: > > can anyone tell me the best way to find a list of copyright dates for > world map projections developed in the 20th century. > > Thanks > George Carhart > > -- > > --------------------------- > Dr. George S. Carhart, Ph.D > Historian of Cartography > and Early Modern Europe > Antiquarian Map Consultant > Historic Research Consultant > > 7 Lafayette Street > Portland > ME, 04101 > USA > (207) 766-1517 > > >