Re: Lisp geographic software

Hi Tiarnán.

> I'm interested in using Lisp for some geographical/cartographical
> work, specifically to do with mapping and using co-ordinate systems in
> different cartographical projections. The maps will be used to display
> geographically specific statistical data.
>
> Is there any body of code that deals with this available for public
> browsing?

Unless you have a purely educational motive, rather than write your own
projections in Lisp, I would strongly recommend binding to the PROJ4 C
library at remotesensing.org using your favourite FFI.

Map projections and datum transformations are particularly difficult to get
right due to the large number of options and issues such as, just for
example, some examples being set by legislation to vary (for purely
practical reasons) from the most accurate published mathematical derivations
with you needing to be totally up on all of the relevant literature. To
test and develop a comprehensive library takes years of effort.

Cheers

Mike Thomas.


.

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