- From: Raphaël Troncy <raphael.troncy@eurecom.fr>
- Date: Thu, 7 Apr 2016 17:49:08 +0200
- To: Frans Knibbe <frans.knibbe@geodan.nl>, SDW WG Public List <public-sdw-wg@w3.org>
Dear Frans, all, We have resolved this exact problem that we have documented in this paper co-authored with IGN (the French National Institute of Geographic and Forestry Information), read http://www.eurecom.fr/~troncy/Publications/Atemezing_Troncy-terra14.pdf. This comes to what Matthew wrote: - we defined the property http://data.ign.fr/def/geometrie#crs that has for domain a http://data.ign.fr/def/geometrie#Geometry which is a subclass of http://www.opengis.net/ont/sf#Geometry - we defined an entire vocabulary to properly define anyone's CRS, see http://data.ign.fr/def/ignf/ - we published a list of CRSs, commonly used by IGN, with proper URI to identify them Hence, the example of Matthew becomes: ex:location1234 a dcterms:Location ; locn:geometry ex:geom1234 ; locn:geometry ex:geom6789 ; ex:geom1234 a geom:Geometry ; geom:crs <http://www.opengis.net/def/crs/EPSG/0/28992> ; gsp:asWKT "<http://www.opengis.net/def/crs/EPSG/0/28992> POINT(139715 476443)"^^geosparql:wktLiteral. ex:geom6789 a geom:Geometry ; geom:crs <http://www.opengis.net/def/crs/OGC/1.3/CRS84> ; gsp:asWKT "<geosparql:asWKT "POINT(5.1633 52.2758)"^^geosparql:wktLiteral. Where: @prefix sf: <http://www.opengis.net/ont/sf#>. @prefix gsp: <http://www.opengis.net/ont/geosparql#>. @prefix ignf: <http://data.ign.fr/def/ignf#>. @prefix geom: <http://data.ign.fr/def/geometrie#>. Raphaël -- Raphaël Troncy EURECOM, Campus SophiaTech Data Science Department 450 route des Chappes, 06410 Biot, France. e-mail: raphael.troncy@eurecom.fr & raphael.troncy@gmail.com Tel: +33 (0)4 - 9300 8242 Fax: +33 (0)4 - 9000 8200 Web: http://www.eurecom.fr/~troncy/
Received on Thursday, 7 April 2016 15:50:00 UTC