- From: Rob Atkinson <rob@metalinkage.com.au>
- Date: Mon, 01 Aug 2016 10:07:34 +0000
- To: Ed Parsons <eparsons@google.com>, Linda van den Brink <l.vandenbrink@geonovum.nl>, SDW WG Public List <public-sdw-wg@w3.org>
- Cc: Jeremy Tandy <jeremy.tandy@gmail.com>
- Message-ID: <CACfF9LwxRLuseNVRYP8hp4cdzSJa1K9agb2SQQeckOdyYpjKXg@mail.gmail.com>
what - we all have funny shaped heads? :-) On Mon, 1 Aug 2016 at 19:14 Ed Parsons <eparsons@google.com> wrote: > CRS are not standardised for the same reason we don't all speak English > :-) I will however give it a go.. > > ed > > > On Mon, 1 Aug 2016 at 07:39 Linda van den Brink <l.vandenbrink@geonovum.nl> > wrote: > >> Hi, >> >> >> >> I still remember well when I started working at Geonovum and first found >> out that there were many different coordinate reference systems. It seemed >> very silly to me that this was not standardized. >> >> >> >> When one of you takes up Jeremy’s challenge, please see what is already >> written about CRS in http://w3c.github.io/sdw/bp/#ref-crs . It makes >> sense to move some of this to an introductory section in the front of the >> document, and any content making this section more accessible is welcome! >> >> >> >> Linda >> >> >> >> *Van:* Jeremy Tandy [mailto:jeremy.tandy@gmail.com] >> *Verzonden:* zaterdag 30 juli 2016 10:06 >> *Aan:* SDW WG Public List; Ed Parsons >> *Onderwerp:* Request for input to the BP doc: an introduction to CRSs >> and related concepts >> >> >> >> Hi- >> >> >> >> Thinking about the article that I just shared [1] on the mailing list it >> occurs to me that to the majority of webby folk, coordinate reference >> systems, projections, datums and the like will seem like some kind of dark >> art ... >> >> >> >> All they will be used to is what every global mapping provider uses: spherical >> / web mercator EPSG:3857 [2] “google maps projection” >> >> >> >> And likely they don't give it any thought at all. >> >> >> >> Much in the same way that I have introduced features / spatial things and >> geometry in the front material of the SDW BP doc [3], I think we need a >> _short_ section to introduce the topic of coordinate/spatial reference >> systems (including non-earth CRS; e.g. cartesian used in >> imagery/microscopy) and projections so that readers: >> >> 1. know what the terms mean (a little bit - point them to references if >> they want to find out more) >> >> 2. why it matters >> >> >> >> Please can a member of the Working Group provide a paragraph or two- and >> better still do it in GitHub and create a Pull Request with your proposal? >> >> >> >> I'm thinking that this might be right up @eparsons' street (no spatial >> pun intended). I also recall that I've recently had conversations with >> @josh about CRS. >> >> >> >> Please help. >> >> >> >> Best Regards, Jeremy >> >> >> >> (who is still thinking about work while I'm trying to pack holiday >> suitcases!) >> >> >> >> PS: I also note that the section I have written on spatial references [4] >> is a little underwhelming. If anyone fancies re-working that section, I >> would appreciate it very much! >> >> >> >> [1]: https://lists.w3.org/Archives/Public/public-sdw-wg/2016Jul/0336.html >> >> >> [2]: https://epsg.io/3857 >> >> [3]: http://w3c.github.io/sdw/bp/#spatial-things-features-and-geometry >> >> [4]: http://w3c.github.io/sdw/bp/#spatial-relations >> > -- > > *Ed Parsons *FRGS > Geospatial Technologist, Google > > Google Voice +44 (0)20 7881 4501 > www.edparsons.com @edparsons >
Received on Monday, 1 August 2016 10:09:42 UTC