More Spatial Relations

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More Spatial Relations

ybtsdst
Hi guys,

Currently only limited spatial relations are supported(e.g.
withins/intersects in prefix tree). In DE-9IM, there are abount 8 relations.

If I want to implement query for other relations, should I just serialize
shape to binary format(e.g. wkb) and fall back to jts?

Any development plan on other relations? or will BKD tree support ogc
geometries and DE-9IM relations?
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Re: More Spatial Relations

david.w.smiley@gmail.com
Hi Bingtao,

> If I want to implement query for other relations, should I just serialize
shape to binary format(e.g. wkb) and fall back to jts?

Yes.  There's a lot already there but you'd need to subclass some stuff to
add some other predicates.  See CompositeSpatialStrategy and
ShapeValuesPredicate.  You could cast the value, a Shape, to a JtsGeometry
(a Spatial4j shape) and then call getGeom() to get the underlying JTS
Geometry instance.  If you find you need to fork entire classes then feel
free to suggest improvements to the extensibility.

~ David

On Tue, May 29, 2018 at 10:52 PM Bingtao Yin <[hidden email]> wrote:

> Hi guys,
>
> Currently only limited spatial relations are supported(e.g.
> withins/intersects in prefix tree). In DE-9IM, there are abount 8
> relations.
>
> If I want to implement query for other relations, should I just serialize
> shape to binary format(e.g. wkb) and fall back to jts?
>
> Any development plan on other relations? or will BKD tree support ogc
> geometries and DE-9IM relations?
>
--
Lucene/Solr Search Committer, Consultant, Developer, Author, Speaker
LinkedIn: http://linkedin.com/in/davidwsmiley | Book:
http://www.solrenterprisesearchserver.com
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Re: More Spatial Relations

ybtsdst
Hi David,

Thanks for you reply.

Compared to the prefix tree, implementation through doc-value seems slow.
It needs to load shapes from doc-value for all docs and check each with the
query shape.


2018-06-02 3:31 GMT+08:00 David Smiley <[hidden email]>:

> Hi Bingtao,
>
> > If I want to implement query for other relations, should I just serialize
> shape to binary format(e.g. wkb) and fall back to jts?
>
> Yes.  There's a lot already there but you'd need to subclass some stuff to
> add some other predicates.  See CompositeSpatialStrategy and
> ShapeValuesPredicate.  You could cast the value, a Shape, to a JtsGeometry
> (a Spatial4j shape) and then call getGeom() to get the underlying JTS
> Geometry instance.  If you find you need to fork entire classes then feel
> free to suggest improvements to the extensibility.
>
> ~ David
>
> On Tue, May 29, 2018 at 10:52 PM Bingtao Yin <[hidden email]> wrote:
>
> > Hi guys,
> >
> > Currently only limited spatial relations are supported(e.g.
> > withins/intersects in prefix tree). In DE-9IM, there are abount 8
> > relations.
> >
> > If I want to implement query for other relations, should I just serialize
> > shape to binary format(e.g. wkb) and fall back to jts?
> >
> > Any development plan on other relations? or will BKD tree support ogc
> > geometries and DE-9IM relations?
> >
> --
> Lucene/Solr Search Committer, Consultant, Developer, Author, Speaker
> LinkedIn: http://linkedin.com/in/davidwsmiley | Book:
> http://www.solrenterprisesearchserver.com
>
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Re: More Spatial Relations

david.w.smiley@gmail.com
For predicates other than "intersects", that is true :-/  Any help you
might be interested in offering here is most welcome.

On Fri, Jun 1, 2018 at 8:38 PM Bingtao Yin <[hidden email]> wrote:

> Hi David,
>
> Thanks for you reply.
>
> Compared to the prefix tree, implementation through doc-value seems slow.
> It needs to load shapes from doc-value for all docs and check each with the
> query shape.
>
>
> 2018-06-02 3:31 GMT+08:00 David Smiley <[hidden email]>:
>
> > Hi Bingtao,
> >
> > > If I want to implement query for other relations, should I just
> serialize
> > shape to binary format(e.g. wkb) and fall back to jts?
> >
> > Yes.  There's a lot already there but you'd need to subclass some stuff
> to
> > add some other predicates.  See CompositeSpatialStrategy and
> > ShapeValuesPredicate.  You could cast the value, a Shape, to a
> JtsGeometry
> > (a Spatial4j shape) and then call getGeom() to get the underlying JTS
> > Geometry instance.  If you find you need to fork entire classes then feel
> > free to suggest improvements to the extensibility.
> >
> > ~ David
> >
> > On Tue, May 29, 2018 at 10:52 PM Bingtao Yin <[hidden email]> wrote:
> >
> > > Hi guys,
> > >
> > > Currently only limited spatial relations are supported(e.g.
> > > withins/intersects in prefix tree). In DE-9IM, there are abount 8
> > > relations.
> > >
> > > If I want to implement query for other relations, should I just
> serialize
> > > shape to binary format(e.g. wkb) and fall back to jts?
> > >
> > > Any development plan on other relations? or will BKD tree support ogc
> > > geometries and DE-9IM relations?
> > >
> > --
> > Lucene/Solr Search Committer, Consultant, Developer, Author, Speaker
> > LinkedIn: http://linkedin.com/in/davidwsmiley | Book:
> > http://www.solrenterprisesearchserver.com
> >
>
--
Lucene/Solr Search Committer, Consultant, Developer, Author, Speaker
LinkedIn: http://linkedin.com/in/davidwsmiley | Book:
http://www.solrenterprisesearchserver.com