- From: Raphaël Troncy <raphael.troncy@eurecom.fr>
- Date: Wed, 09 Jan 2013 16:59:06 +0100
- To: Chris Beer <chris@codex.net.au>
- CC: John Goodwin <John.Goodwin@ordnancesurvey.co.uk>, Andreas Harth <harth@kit.edu>, public-locadd@w3.org
Hello Chris, > But, at the risk of trivialising, what I actually find even stranger > is that at the core, geo is really about two numbers (lat,long) or 3 > if you want to add altitude (and yes, even a polygon is just a > container of coordinates)- its not really semantic. Yet we see a lot > of effort going into this nowadays. ... because it is a bit more complex than this :-) As Philippe said, if you start to talk about lat/long, you assume a coordinate systems (and you probably assume WGS84). Sadly, there are tons of coordinate systems, and good reasons to have many and you might want to declaratively say which one you use and how to project from one to the other, etc. Second, there are geometries, which in some use cases can be represented as a container of coordinates, but in some other use cases, need to have a bit more structure and semantics, because part of geometries are shared, etc. For the rest, I agree with what you said, and clearly the GIS and SW community need to talk to each other more, but I see those (hopefully merged) groups the perfect occasion for doing this. 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 Wednesday, 9 January 2013 15:59:38 UTC