Re: [Virtuoso-users] SPATIAL JOIN queries in Virtuoso

Hi Maria, We are checking this with development as I have found another occurrence of this error also and do believe the st_distance() function only works with points … There are two other functions, haversine_deg_km() & dist_from_point_to_line_segment() documented at: http://virtuos

Re: [Virtuoso-users] SPATIAL JOIN queries in Virtuoso

Dear Kingsley, Thanks a lot for all the links. I tried running the example queries which you gave, but from the queries it seems function st_distance works only with points. I also found a discussion here: https://groups.google.com/forum/#!topic/linked-geo-data/nxQy719M5EQ regarding the same. I'll

Re: [Virtuoso-users] SPATIAL JOIN queries in Virtuoso

On 2/24/16 4:05 PM, Maria Jackson wrote: > Dear Kingsley, > > Sure I'll do that :) But I am a bit novice so I dont know how can I > use my query against your instances of LOD (Dbpedia essentially has > spatial geometries in the form of points instead of polygons. And my > current focus is on polygo

Re: [Virtuoso-users] SPATIAL JOIN queries in Virtuoso

Dear Kingsley, Sure I'll do that :) But I am a bit novice so I dont know how can I use my query against your instances of LOD (Dbpedia essentially has spatial geometries in the form of points instead of polygons. And my current focus is on polygons) :) The example polygon which I took is from Lin

Re: [Virtuoso-users] SPATIAL JOIN queries in Virtuoso

On 2/24/16 3:11 PM, Maria Jackson wrote: > Dear Kingsley, > > I am afraid, I did see > http://kidehen.blogspot.com/2014/02/geospatial-querying-over-linked-open.html. > But I am unable to understand as to why myself and Mr. Hugh are > getting errors with querying spatial data. Can you please help me

Re: [Virtuoso-users] SPATIAL JOIN queries in Virtuoso

Dear Kingsley, I am afraid, I did see http://kidehen.blogspot.com/2014/02/geospatial-querying-over-linked-open.html. But I am unable to understand as to why myself and Mr. Hugh are getting errors with querying spatial data. Can you please help me understand as to where am I going wrong? On Thu, F

Re: [Virtuoso-users] SPATIAL JOIN queries in Virtuoso

On 2/24/16 10:31 AM, Hugh Williams wrote: > Hi Maria, > > The following slide on that tutorial shows how to find place within a given > proximity of each other: > > > http://virtuoso.openlinksw.com/tutorials/sparql/SPARQL_Tutorials_Part_10/SPARQL_Tutorials_Part_10.html#(6) seeAlso: [1] h

Re: [Virtuoso-users] SPATIAL JOIN queries in Virtuoso

I am afraid I used bif:st_distance function itself but still I am getting the following error: SQL> sparql select ?place ?nplace (( bif:st_distance( ?long,?nlong) ) AS ?distance) WHERE {graph ?g1{?place ?long} graph ?g4{?nplace

Re: [Virtuoso-users] SPATIAL JOIN queries in Virtuoso

Hi Maria, The following slide on that tutorial shows how to find place within a given proximity of each other: http://virtuoso.openlinksw.com/tutorials/sparql/SPARQL_Tutorials_Part_10/SPARQL_Tutorials_Part_10.html#(6) Best Regards Hugh Williams Professional Services OpenLink Software,

Re: [Virtuoso-users] infrequent errors on parallel querying

Hi Hugh, in addition to my last mail I have the following question: Do the logs “missed delete of name id cache…” have any influence on the completeness of query results? Best Andy Von: Nolle, Andreas Gesendet: Dienstag, 23. Februar 2016 14:42 An: 'Hugh Williams' Cc: virtuoso-users@lists.sou

Re: [Virtuoso-users] SPATIAL JOIN queries in Virtuoso

Dear Hugh, I have a deadline tomorrow, therefore I'll be thankful if you can help me with this a bit? On Wed, Feb 24, 2016 at 12:03 AM, Maria Jackson wrote: >> Is the above query known to be valid ie has been run elsewhere or is this >> just a general spatial join query you are trying to get wor