- From: Raphaël Troncy <raphael.troncy@eurecom.fr>
- Date: Tue, 19 May 2015 10:09:02 +0200
- To: Simon.Cox@csiro.au, Kerry.Taylor@csiro.au, L.Svensson@dnb.de, eparsons@google.com, janowicz@ucsb.edu
- CC: public-sdw-wg@w3.org
Dear Simon, > Thanks Kerry - that's essentially the way I see it, if by "linked > data representation" you are implying RDF. I would like to ask those > people advocating a new CRS encoding in RDF, what this would be > useful for? Well of course, this is a very "niche" usage, but typical use cases are for getting an explicit semantic description of how a CRS has been built so that you can, for example, query for all CRSs that use a specific Datum, or, more simply, ask for the EPSG identifier corresponding to the URI of a CRS, etc. > The main use for a CRS _description_ (as opposed to > denotation) is to support _coordinate transformation_, which is a > very mathematical operation. Not really what RDF is good at. I agree. I would not argue that the RDF description of a CRS is crucial for actually implementing the coordinate transformation. Note that for this, we have also started to implement a REST-based service that do pair-wise coordinate transformation between CRS, see https://github.com/vienlam/Geo Best regards. Raphaël -- Raphaël Troncy EURECOM, Campus SophiaTech Multimedia Communications 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 Tuesday, 19 May 2015 08:09:48 UTC