I am working on a bunch of perl modules which are nominally GIS related. I'm further than before, but I am not ready to say it will be done soon.
The latest hurdle, is Akima interpolation. Yes, Math::GSL has one particular Akima interpolant. With options, I have 8. And currently Math::GSL doesn't work on i86 where the hardware supports 64 bit, and the user is running a 32 bit OS. Some strange stack problem, which effects a bunch of programs. A long time ago, I wrote a natural cubic spline in FORTRAN-77. I've seen cubic splines implemented in 6 lines of APL. Akima splines are unusual, in that they allow "corners" in a data set. And they are better at avoiding wiggles. But, to introduce a corner into a dataset takes some deliberate effort. Many materials properties have "corners", but to satisfy Akima interpolatants, artificial points would probably still have to be added. But, if someone goes to the effort to properly introduce a corner into a dataset, such that Akima interpolation will recognize the corner (if it is capable), I suspect this interpolant will be used for a long time. And it should have metadata accompaning it. The place where I've seen the biggest recognition, need and use of metadata is GIS. So, I am calling you experts. :-) Is there an accepted metadata standard which works with GIS? Do people have ideas on what is required? Gord -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: http://lists.debian.org/[email protected]
