[postgis-devel] Dijikstra

[Stephen Mather]

Cool.  Yah, it looks like the database integration portion is pretty
light-- just some quick wrappers.

Thanks Paul,
Best,
Steve




On Fri, Mar 29, 2013 at 7:27 PM, Paul Ramsey <pramsey at cleverelephant.ca>wrote:

> The main difficultly in writing something independent and then trying to
> integrate it is that you'll have to define data structures to solve your
> problem and many of them may be duplicated in the postgis code. This makes
> the final integration step more work than one might like.
>
> The best interest sol'n, IMO, is to build with (and within) liblwgeom,
> ignoring the database piece entirely. You can get something up and running
> there in pure C, put your tests in CUnit, and debug there, and once
> everything is complete binding into the database itself is relatively
> trivial.
>
> P
>
> --
> Paul Ramsey
> http://cleverelephant.ca
> http://postgis.net
>
>
> On Friday, March 29, 2013 at 4:18 PM, Stephen Mather wrote:
>
> > Hi All,
> > Assuming I spelled that right... working on wrapping my brain around
> adding Dijikstra to PostGIS, which is a largely pleasant way to ride Amtrak
> back. I had hoped to find something useful in pgRouting as a starting
> point, but it looks to my novice eyes like Dijikstra is dependent on Boost,
> so no dice there.
> > Anyway, in going down this thread, I've started studying
> http://trac.osgeo.org/postgis/wiki/DevWikiMain
> >
> > Hopefully updated these lines correctly:
> >
> > "New functions submitted will have to go into the next minor release
> which is currently (PostGIS 2.0.4).
> >
> > New functions/features that require on disk structural changes will go
> into next major release (PostGIS 2.1)"
> >
> > Anyway, to the topic at hand: regarding function development for a
> noob-- as a starting place, is it more important for me to get a bit of
> functioning code that works on a static dataset, and then figure out how to
> patch that into using liblwgeom etc., or better to understand how to write
> the function from the ground up in the PostGIS way?
> >
> > Thanks,
> > Best,
> > Steve
> > _______________________________________________
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>
>
>
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