Marco Neumann wrote:
Marco
well how so? I currently provide GeoSpatialWeb as GNU Lesser GPL +
r-tree index (Copyright (C) 2002 Navel Ltd.
Hi Marco
see: http://apache.org/legal/3party.html
Probably, not so 'simple'. :-/
The r-tree index is what you would replace with your PostGIS implementation.
Yep.
Are you OK with GNU Lesser GPL. What kind of license would you prefer?
See above.
I am happy to extend the GeoSpatialWeb API. Do you plan to support
geometries or only points?
There is no plan, it depends on what people are willing to do and contribute.
From my point of view (and Talis), I'd love to have something simple (i.e. easy
to install and manage, almost zero manual intervention, with little dependencies
on third party products, ideally pure Java) to provide simple spatial searches:
with in a circle (results sorted by distance) and bounded box searches.
There are situation where a true GIS is needed, but I don't see that being the
majority of our use cases. In these scenarios however a PostGIS implementation
is obvious preferable.
Is there any relation between the GeoSpatialWeb API and the work in GeoSPARQL?
I know GeoSpatliaWeb predates that, but I wonder if you have any plans in
relation to supporting (or not) GeoSPARQL.
Thanks,
Paolo
Marco
On Tue, Sep 13, 2011 at 11:03 AM, Paolo Castagna
<[email protected]> wrote:
Marco Neumann wrote:
Hi Alex,
you can "easily" extend GeoSPARQL to support your desired geospatial
index.
We use a spatial filter during query processing for candidate
selection as outlined by Voissard in Spatial Databases an Introduction
[1]. It would be great if you could build on what we already have in
the geospatialweb project
http://code.google.com/p/geospatialweb/
Hi Marco,
if we want to have this contributed to the Apache Jena project, do you think
there will be problems in relation to licenses of GeoSPARQL or any of its
dependencies?
Thanks,
Paolo
Best,
Marco
[1] http://page.mi.fu-berlin.de/voisard/
On Tue, Sep 13, 2011 at 7:42 AM, Alexander Dutton
<[email protected]> wrote:
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Hi all,
We've currently got a lot of (simple) geospatial data in
<http://data.clarosnet.org/> (served behind the scenes by Fuseki).
We'd like to do some geospatial indexing magic, and were wondering
about writing something a bit like LARQ that will pull out things like
geo:Points and WKT literals, place them in a PostGIS-flavoured DB, and
then implements something like GeoSPARQL (<http://geosparql.org/>).
Has anyone started doing this or something similar? I'm happy to give
it a go and I'm sure my employer would be happy to contribute it back
to Jena and the ASF. My plan was to go through the LARQ codebase to
work out how it hooks itself in, and use that as a model.
Yours,
Alex
- --
Alexander Dutton
Metamorphoses Project Developer, Claros
Oxford University Computing Services, ℡ 01865 (6)13483
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