Hi Andy, Just to follow up on this, I went ahead and filed this issue:
https://issues.apache.org/jira/browse/SIS-42 I'm going to start work on implementing the Geo SPARQL spec in SIS, maybe even integrating with Any23 (and Jena down the road, but Any23, I'm a tad more familiar with at the moment). I'm CC'ing the any23-dev and jena-dev user lists (apologies for the SPAM guys) just to keep them in the loop. Cheers, Chris On Jan 31, 2012, at 4:59 AM, Andy Seaborne wrote: > Hi there, > > I'm investigating what it would take to implement GeoSPARQL. > There is already an Apache-licensed SPARQL engine in podling Jena. > > Of the things needed are a persistent storage layer with the right > license. Maybe the SIS project has something to use. > > If I understand it correctly, the qtree implementation is an in-memory > structure, with the ability to read from a serialized form on disk, and > to be able to write it to disk in that form. > > Is there any information on scaling for the qtree? Memory usage? > > California_Restaurants.csv is 54K points - is that typical usage size? > > (yes ... there are other things needed as well such as conversion code > between coodinate systems, format parsers, polygon code, ... but a start > would be just for point data in one system :) > > An open copy of the spec is available at: > > http://www.w3.org/2011/02/GeoSPARQL.pdf > > Andy ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Chris Mattmann, Ph.D. Senior Computer Scientist NASA Jet Propulsion Laboratory Pasadena, CA 91109 USA Office: 171-266B, Mailstop: 171-246 Email: [email protected] WWW: http://sunset.usc.edu/~mattmann/ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Adjunct Assistant Professor, Computer Science Department University of Southern California, Los Angeles, CA 90089 USA ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
