[postgis-devel] Lacking of exact knn-gist?

[Alexander Korotkov]

That's good. Now I'm looking for dataset to do some tests of "exact knn".

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

On Fri, Jun 27, 2014 at 9:48 PM, <maplabs at light42.com> wrote:

> Alexander -
>
>
>   there are some images here that might be useful..
>
> I dont know exactly what the question is, but, this post is an attempt at
> showing several distance searchs and the results.
>
>
>   http://blog.light42.com/wordpress/?p=102
>
>
> --
>
> Brian M Hamlin
>
> OSGeo California Chapter
>
> blog.light42.com
>
>
>
>
> On Fri, 27 Jun 2014 21:29:58 +0400, Alexander Korotkov <
> aekorotkov at gmail.com> wrote:
>
> Hi!
>
> Turning back to this topic. Could you prepare dump and SQL examples,
> please?
>
> ------
> With best regards,
> Alexander Korotkov.
>
> On Fri, Jan 17, 2014 at 6:04 PM, Paul Ramsey <pramsey at cleverelephant.ca>
> wrote:
>
>>  Alex,
>>
>> This piece of the workshop gives some visuals about how unpleasant
>> reasoning abound nearest neighbour using boxes is. (It’s almost
>> embarrassing trying to explain it to people)
>>
>> http://workshops.boundlessgeo.com/postgis-intro/knn.html
>>
>> You can pull the NYC roads data from the associated data package and
>> replicate the results.
>> I can prepare something more plug-n-play (dump file and SQL examples)
>> when I get back home if needed.
>>
>> P.
>>
>> --
>> Paul Ramsey
>> http://cleverelephant.ca
>> http://postgis.net
>>
>> On January 17, 2014 at 9:01:33 AM, Alexander Korotkov (
>> aekorotkov at gmail.com <//aekorotkov at gmail.com>) wrote:
>>
>>
>> You may take a look at my patch to PostgreSQL enabling exact knn-gist:
>>
>> http://www.postgresql.org/message-id/CAPpHfdu_qBLNRnv-r=_tofZYYa6-r=Z5_MGF4_phAOkWcYxfRg@mail.gmail.com
>>  Ideally, it could be in 9.4. But I expect serious critics about
>> accessing heap from gist is fundamentally bad design.
>> Test cases are very welcome. It would be very nice to have them before January
>> 19. <http://airmail.calendar/2014-01-19%2012:00:00%20EST> I know it very
>> soon, but in this case I can include them to PGCon proposal.
>>
>>
>
> ------------------------------
>
> _______________________________________________
> postgis-devel mailing list
> postgis-devel at lists.osgeo.org
> http://lists.osgeo.org/cgi-bin/mailman/listinfo/postgis-devel
> <http://webmail.light42.com/hwebmail/services/go.php?url=http%3A%2F%2Flists.osgeo.org%2Fcgi-bin%2Fmailman%2Flistinfo%2Fpostgis-devel>
>
>
>
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/postgis-devel/attachments/20140627/ecdc6db8/attachment.html>