From: John H. <jdh...@ac...> - 2004-10-28 14:34:15
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>>>>> "gary" == gary ruben <gr...@bi...> writes: gary> Some more possible contour generating code links: [1] http://www.geog.uni-hannover.de/grass/ [2] http://www.triplexware.huckfinn.de/geogfix.html [3] http://www.triplexware.huckfinn.de/contweber.html [4] http://astronomy.swin.edu.au/~pbourke/projection/conrec/ [5] http://members.bellatlantic.net/~vze2vrva/ Hi Gary, thanks for the tips. Note that [1] appears to be GPLd and we're looking for a routine with licenses as permissive as the PSF/matplotlib license. I believe [2] and [4] are both pointing to the same algorithm, by Paul Bourke - this one has a C++ implementation that includes the following license restriction Additionally, the authors grant permission to modify this software and its documentation for any purpose, provided that such modifications are not distributed without the explicit consent of the authors and that existing copyright notices are retained in all copies. Some of the algorithms implemented by this software are patented, observe all applicable patent law. Since this code implements the Bourke algorithm, I assume the other implementations have the same patent restrictions, but I haven't taken a close look. [3] is released under the MPL - http://www.mozilla.org/MPL/MPL-1.1.html, which as I understand has a complex licensing history - it certainly takes a lawyer to read through it - I'm not sure what the status is. [5] is certainly as possibility, if as you say, we contact the author and see if he is willing to release it to us. Hopefully, all of this is moot, as I understand that STSci has been working on a routine ripped from gist and Perry says they are close to having a prototype. I still think it's worthwhile investigating whether marching squares is patented or enforceable - Mr Horton's response was not terribly enlightening. JDH |