Here is some math I found: http://www.flickr.com/groups/mathmap/discuss/72157604625488382/
On Tue, Feb 23, 2010 at 6:10 PM, Dane Springmeyer <[email protected]> wrote: > Yes and no. > > Mapnik uses Proj.4 for coordinate transformation, and Proj.4 is powerful. > All you need to do to use that projection with Mapnik is to construct the > proj.4 string that properly describes the projection and send that to > Mapnik. > > However, that seems like quite a custom/rare projection, so finding the > proj.4 string for it may not be possible, and manually constructing it will > require a deep understanding of projection math. > > For example, there is no mention of Peirce projections at > http://spatialreference.org/ref/?search=+stereographic&srtext=Search > > But, from the wikipedia article I see it is based on stereographic > principles, so you could start but trying/modifying some of these: > > http://spatialreference.org/ref/?search=+stereographic&srtext=Search > > Dane > > > > On Feb 23, 2010, at 8:51 AM, Ciscaucasus Xabarnama wrote: > >> Hello, >> >> I would like to generate maps using the Peirce quincuncial projection >> (http://en.wikipedia.org/wiki/Peirce_quincuncial_projection) in >> mapnik. >> >> Is there a way to do this? >> >> -cixa >> _______________________________________________ >> Mapnik-users mailing list >> [email protected] >> https://lists.berlios.de/mailman/listinfo/mapnik-users > > _______________________________________________ Mapnik-users mailing list [email protected] https://lists.berlios.de/mailman/listinfo/mapnik-users
