[GeoSciML] Vancouver meeting notes

Joshua Lieberman jlieberman at tumblingwalls.com
Tue Jun 12 21:48:46 EDT 2018


The good news is that GeoJSON and JSON coordinate lists may not be compatible with RDF/OWL, but they are simple and straightforward to convert back and forth to GeoSPARQL-type geometry literals, so not an obstacle to interoperability.

—Josh 

> On Jun 12, 2018, at 9:44 PM, Simon.Cox--- via GeoSciML <geosciml at lists.opengeospatial.org> wrote:
> 
> I notice you have re-discovered the JSON-LD gotcha – no nested arrays.
>  
> I’m not convinced this is a big problem. The RDF model is for logic and reasoning, not for math operations. Thus I don’t think RDF is relevant to coordinates and geometries – whole geometries can be expressed as RDF literals, but not individual coordinate values. So there is no need for nested arrays. GeoSPARQL recognized this by putting a boundary between the conceptual aspects that are modelled in RDF, and the geometries which are expressed in a micro-format in Literals of type http://www.opengis.net/ont/geosparql#wktLiteral <http://www.opengis.net/ont/geosparql#wktLiteral> or http://www.opengis.net/ont/geosparql#gmlLiteral <http://www.opengis.net/ont/geosparql#gmlLiteral>. See sections 8.5 and 8.6 in GeoSPARQL.
>  
> And anyway, GeoSciML shouldn’t be trying to solve the geometry/geography problems – stick to your knitting, which is geology and geophysics.
>  
> GeoJSON is interesting and important, but is not compatible with JSON-LD.
>  
> Simon 
>  
> From: GeoSciML [mailto:geosciml-bounces+simon.cox=csiro.au at lists.opengeospatial.org] On Behalf Of Boisvert2, Eric (NRCan/RNCan) via GeoSciML
> Sent: Wednesday, 13 June, 2018 05:32
> To: GeoSciml OGC mainling list <geosciml at lists.opengeospatial.org>
> Cc: Boisvert2, Eric (NRCan/RNCan) <eric.boisvert2 at canada.ca>
> Subject: [GeoSciML] Vancouver meeting notes
>  
> https://external.opengeospatial.org/twiki_public/GeoSciMLswg/VancouverGsmlJune2018 <https://external.opengeospatial.org/twiki_public/GeoSciMLswg/VancouverGsmlJune2018>
>  
> please tell me if I forgot anything
>  
> Eric

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