[postgis-devel] New node splitting algorithm for GiST

[Alexander Korotkov]

Hi, Paul!

I see following things need to be done in order to add my algorithm to
PostGIS:
1) Adopt algorithm for PostGIS data structures.
2) Test it on some additional datasets.
I could put my hands on it if it accelerates inclusion of my algorithm info
PostGIS. For number 2 I need relevant datasets for testing.

------
With best regards,
Alexander Korotkov.

On Mon, Jan 9, 2012 at 1:23 AM, Paul Ramsey <pramsey at cleverelephant.ca>wrote:

> It's on my list, but so are a lot of other things...!
> P.
>
> On Sun, Jan 8, 2012 at 7:50 AM, Alexander Korotkov <aekorotkov at gmail.com>
> wrote:
> > Hi!
> >
> > Any news about this topic so soon?
> > This split method is part of my Ph. D. thesis. And it would be nice for
> me
> > to have included into PostGIS too.
> >
> > ------
> > With best regards,
> > Alexander Korotkov.
> >
> > On Wed, Oct 12, 2011 at 11:07 PM, Paul Ramsey <pramsey at opengeo.org>
> wrote:
> >>
> >> NM, I actually read the paper :)
> >> P.
> >>
> >> On Wed, Oct 12, 2011 at 11:59 AM, Paul Ramsey <pramsey at opengeo.org>
> wrote:
> >> > Is the algorithm still O(N) or is it O(N^2) ala Guttman?
> >> > P.
> >> >
> >> > On Wed, Oct 12, 2011 at 11:58 AM, Alexander Korotkov
> >> > <aekorotkov at gmail.com> wrote:
> >> >>
> >> >>
> "A new double sorting-based node splitting algorithm for R-tree", A. Korotkov
> >> >>
> http://syrcose.ispras.ru/2011/files/SYRCoSE2011_Proceedings.pdf#page=36
> >> >> I believe it's applicable to not very high dimensions (3 or 4). On 5
> >> >> and
> >> >> more dimensions guttmann quadratic algorithm could become more
> >> >> effective
> >> >> than my.
> >> >> ------
> >> >> With best regards,
> >> >> Alexander Korotkov.
> >> >> On Wed, Oct 12, 2011 at 10:49 PM, Paul Ramsey <pramsey at opengeo.org>
> >> >> wrote:
> >> >>>
> >> >>> And, in general terms, do you think this approach would be
> applicable
> >> >>> in higher dimensions?
> >> >>> P
> >> >>>
> >> >>> On Wed, Oct 12, 2011 at 11:49 AM, Paul Ramsey <pramsey at opengeo.org>
> >> >>> wrote:
> >> >>> > Thanks for this, could you give me a reference to your paper too?
> >> >>> > P.
> >> >>> >
> >> >>> > On Wed, Oct 12, 2011 at 10:52 AM, Alexander Korotkov
> >> >>> > <aekorotkov at gmail.com> wrote:
> >> >>> >> Hi!
> >> >>> >> Heikki Linnakangas recently commit my patch with new node
> splitting
> >> >>> >> algorithm for GiST to PostgreSQL master branch:
> >> >>> >>
> >> >>> >>
> >> >>> >>
> http://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=7f3bd86843e5aad84585a57d3f6b80db3c609916
> >> >>> >> Since it can significantly accelerate index search, you might be
> >> >>> >> interested
> >> >>> >> to apply same changes to PostGIS.
> >> >>> >> Discussion threads are here:
> >> >>> >>
> http://archives.postgresql.org/pgsql-hackers/2011-10/msg00158.php
> >> >>> >>
> http://archives.postgresql.org/pgsql-hackers/2011-09/msg00576.php
> >> >>> >> ------
> >> >>> >> With best regards,
> >> >>> >> Alexander Korotkov.
> >> >>> >> _______________________________________________
> >> >>> >> postgis-devel mailing list
> >> >>> >> postgis-devel at postgis.refractions.net
> >> >>> >> http://postgis.refractions.net/mailman/listinfo/postgis-devel
> >> >>> >>
> >> >>> >>
> >> >>> >
> >> >>> _______________________________________________
> >> >>> postgis-devel mailing list
> >> >>> postgis-devel at postgis.refractions.net
> >> >>> http://postgis.refractions.net/mailman/listinfo/postgis-devel
> >> >>
> >> >>
> >> >> _______________________________________________
> >> >> postgis-devel mailing list
> >> >> postgis-devel at postgis.refractions.net
> >> >> http://postgis.refractions.net/mailman/listinfo/postgis-devel
> >> >>
> >> >>
> >> >
> >> _______________________________________________
> >> postgis-devel mailing list
> >> postgis-devel at postgis.refractions.net
> >> http://postgis.refractions.net/mailman/listinfo/postgis-devel
> >
> >
> >
> > _______________________________________________
> > postgis-devel mailing list
> > postgis-devel at postgis.refractions.net
> > http://postgis.refractions.net/mailman/listinfo/postgis-devel
> >
> _______________________________________________
> postgis-devel mailing list
> postgis-devel at postgis.refractions.net
> http://postgis.refractions.net/mailman/listinfo/postgis-devel
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/postgis-devel/attachments/20120215/35c3339a/attachment.html>