Thank you Lorenz for the information. Since I have created the first GeoSPARQL implementation (called jena-spatial in the code base) and coined the term GeoSPARQL in collaboration with Taylor Cowan back in 2008 I am well aware of efforts around GeoSpatial SPARQL and RDF.
While I appreciate the active research here it is somewhat telling that the authors haven't mentioned any previous or active Jena implementation over the last couple of years. And now again no mention of the work done by Greg Albiston, Haozhe Chen and Taha Osman on the new and more comprehensive GeoSPARQL Jena Implementation. Which is already active for more than 3 years. It's either just an example of poor research or simply ignorance on behalf of the authors of what goes on in terms of geospatial RDF and or GeoSPARQL. In the future I would like to refer to similar efforts by the authors here exclusively as OGC GeoSPARQL and selected Triple Store Benchmark . You might want to bring this up with the authors of the document. Best, Marco On Fri, Jun 14, 2019 at 7:28 AM Lorenz <[email protected]> wrote: > Hello everyone, > > now that you released the first version with support for GeoSPARQL, you > might also be interested in > > - running Jena on a new benchmark system called Geographica 2 [1] > - as well as check for feature support compared to other systems (Table > 1 in the paper [2]) > > Might be a good idea to mention on the Jena website which of those > features are also possible with Jena? And maybe even planned for future > work? > > Regarding running the benchmark, I don't know how much time and effort > it takes to setup and run the benchmark. > > Moreover, it might also worth to let the authors know that there is > another system now with GeoSPARQL support given that I assume they might > re-run their benchmark in the future and update their benchmark results > page > > > In future work, we plan to include in the bench- > > mark the newest Virtuoso version which offers some > > GeoSPARQL features; we have not been able to do it > > in this version due to problems with the current imple- > > mentation as we discussed in Section 4.2. > > By the way, looking at the benchmark results, except for Strabon system, > the Spatial join performance looks horrible. > > I know all of those things are time costly, but nevertheless I wanted to > let you know of this system/paper which I spotted quite recently. Some > of you might indeed already be aware of it. > > > Cheers, > > Lorenz > > > [1] http://geographica2.di.uoa.gr/ > [2] https://arxiv.org/abs/1906.01933 > > > > -- > Lorenz Bühmann > AKSW group, University of Leipzig > Group: http://aksw.org - semantic web research center > > -- --- Marco Neumann KONA
