Re: [Virtuoso-users] Support for Lines and Polygons in Virtuoso's Geospatial Extensions

2010-12-04 Thread William Waites
* [2010-12-05 00:29:05 +0600] Ivan Mikhailov écrit: ] 1. What types of spatial things should be supported? ] ] 2. What operations should be supported? ] ] 3. What sorts of geometry should be supported? ] ] The problem is that costs of features are not additive, the total cost ] of the imple

Re: [Virtuoso-users] Support for Lines and Polygons in Virtuoso's Geospatial Extensions

2010-12-04 Thread Ivan Mikhailov
Hello William > One challenge is that we still have no consensus on how to express > this type of data and these operations in RDF, but that's a separate > issue from support in the database itself. IMHO, the lack of consensus of candidate users is a significant problem, and the problem is "three