Mike,
One more comment: There's a lot more on that page than I realized. (My
NetScape browser displayed it in a very inconvenient form; the printed
form uses miniscule characters, but is much easier to find things in.)
There is a link allowing you to download the author's software. Also,
he mentions a C version of GCTP that includes the projection you want,
available from EROS. A word of warning: I know someone who downloaded
this C code several years ago and found it extremely buggy; I hope it's
been improved in the interim ...
Good luck,
Dave
On Thu, 22 Jul 2004, Dave Kennison wrote:
> Mike,
>
> > Hello. I am working with 8 km x 8 km fractional vegetation cover
> > data from Univ Arizona. I managed to convert the binary data to
> > ascii and read the data values with NCL. However, I am unable to
> > determine the latitudes/longitudes of each point in the 2168x5004
> > grid. I believe it is a Goode's projection. Anyone know how to
> > compute the latitudes/longitudes on such a projection?
>
> The Interrupted Goode Homolosine Projection is not one that NCAR
> Graphics handles, though NG does include the sinusoidal projection
> and a form (but maybe not the right form) of the Mollweide projection,
> both of which are used by the IGHP.
>
> You've probably already Googled this and so know about this site:
>
> http://edcdaac.usgs.gov/1KM/goodesarticle.asp
>
> It describes the projection and an algorithm for mapping from lat/lon
> to the projection plane and vice-versa. I think I would find it rather
> heavy going to translate this into a piece of code, but maybe you can
> contact the author and obtain his code and/or get suggestions as to
> how to proceed.
>
> Dave Kennison
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