Hi, I have some geo:Geometry resources with wgs:lat and wgs:long. And I am trying to get the distance between them. However, nothing is returned. Any clue why? PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX wgs: <http://www.w3.org/2003/01/geo/wgs84_pos#> PREFIX geo…

Hi Daniel, First off, have you taken a look at our Geospatial primer ? You probably have, but I would be remiss not to have pointed it out to you if you haven't. That said, can you share the data you are using with which you see this issue?

Hi Stephen, Yes, I have read multiple times the primer and the geospatial section in the manual. For the data I am not sure if I can share it with you. I will verify. In the meantime, here is a sample showing one Geometry instance (which is also a Property) with its lat and long wgs properties. …

Another view of the same sample: [image]

Daniel, I threw together an incredibly small dataset in an attempt to reproduce your problem, and I wasn't able to: PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX wgs: <http://www.w3.org/2003/01/geo/wgs84_pos#> PREFIX geo: <http://www.opengis.net/ont/geosparql#> PREFIX geof: <htt…

Thanks again Stephen. Yes, the spatial indexing is ON. [image]

Hi Stephen, To verify my setup, I have loaded your test data and executed your query. And the result was fine. Conclusion: my database and my ontologies are ok. But something else is wrong. The source of my problem seems to be the data itself. In fact, my wgs source coordinates are in string fo…

The decimal positions don't seem to matter, nor does the conversion from string to decimal. At least not in my simple data set: insert data { graph <http://cdpq.com/rcagraph_geo2> { :geom1 a geo:Geometry ; :lat "45.463497600000004" ; :lon "-73.70411709999999" . …

Thanks again for your help Stephen, I did a few other tests and got something new. I have used a combination of your test dataset and mine. And I have tried to calculate the distance 3 different ways: (1) Using two variables ?geom1 and ?geom2 (2) Directly referring to your dataset IRI short nam…

Hi Stephen, I have done more tests this morning. (1) On the first execution, I have reproduced your other test with your small dataset. And the result was fine. (2) On the second execution, I have modified the previous query in (1) and added an optional clause for the bind statement in which the…

What is the reason of putting it inside an OPTIONAL? An OPTIONAL clause is evaluated separately and then via a left-outer join put together with the other BGP, so the BIND inside the OPTIONAL is not aware of any binding of the variables at all.

Cannot get geof:distance calculated

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serge (Serge Colle - Senior Solution Architect) April 17, 2019, 12:40pm 17

I think this issue and the issue mentioned in Geo Spatcial query return Eval Query -1 Error where geospatial loaded via virtual graph do not work are due to the same root cause.

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Geo Spatcial query return Eval Query -1 Error Support	10	602	April 17, 2019
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Cannot get geof:distance calculated

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