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Non lat/lon map projections

Hi, Everybody -- 

I am collaborating with a group at NASA GSFC on a project
called Land Information System (LIS) which will be
generating a lot of model output (global data at 1km
resolution) that they will distribute via DODS (oops, I mean
OpenDAP) and a web interface. They are considering using LAS
as the web interface, but they need to support some
additional map projections beyond good ol' basic lat/lon. 

In the Ferret documentation, it says that curvilinear map
projections are supported by using shade, fill, or contour
with two additional arguments, x_page and y_page, which are
grids that specify the X page (horizontal) position and Y
page (vertical) position for each (i,j) index pair. 

So, here's my question. Would it be too terribly difficult
for me to modify the LAS code to allow for an additional
view option, something like a "projected xy slice"? I'm
assuming that the x_page and y_page grids depend on the
requested plot domain, so I'd have to generate them on the
fly, for each user request. How would I do this? 

I should mention that the actual projections they'll want to
support haven't been determined yet, so  I can't be any more
specific. But even a general discussion on converting to a
known projection would be helpful. 

Thanks for your advice,
Jennifer Miletta Adams
Center for Ocean-Land-Atmosphere Studies
4041 Powder Mill Road, Suite 302
Calverton, MD 20705-3106
Phone: (301)902-1278 or (301)595-7000
Fax:   (301)595-9793
Email: jma@cola.iges.org

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