Re: BP5: suggestion

thanks Peter. I'll take a look at your two Pull Requests tomorrow. Jeremy

On Mon, 10 Apr 2017 at 11:16 Peter Parslow <Peter.Parslow@os.uk> wrote:

> Kerry, Jeremy,
>
> OK, I’ve included that in pull 660 – with a couple of uses cases which I
> believe have less exacting requirements for positional accuracy
>
>
>
> Peter
>
>
>
> *From:* Jeremy Tandy [mailto:jeremy.tandy@gmail.com]
> *Sent:* 05 April 2017 23:22
> *To:* Kerry Taylor <kerry.taylor@anu.edu.au>; SDW WG Public List <
> public-sdw-wg@w3.org>; Peter Parslow <Peter.Parslow@os.uk>
> *Subject:* Re: BP5: suggestion
>
>
>
> Hi Kerry - I agree with your suggestion. Currently Peter Parslow is
> updating BP5 so I've alerted him to your suggestion.
>
>
>
> (see Pull Request 660 [1] where he's adding his changes)
>
>
>
> Jeremy
>
>
>
>
>
> [1]: https://github.com/w3c/sdw/pull/660
>
> On Wed, 5 Apr 2017 at 21:00 Kerry Taylor <kerry.taylor@anu.edu.au> wrote:
>
> Best Practice 5: Describe the positional accuracy of spatial data
>
>
>
> Says under “Why?” ---“ the precision of the specified coordinates, the
> accuracy of positioning on the actual earth's surface using WGS84 will only
> approach about a meter horizontally and may have apparent errors of up to
> 100 meters vertically, because of assumptions about reference systems,
> tectonic plate movements and which definition of the earth's 'surface' is
> used.”
>
>
>
> That’s fair enough, but does not seem to be an answer to why?. Suggest
> move this down a bit  and for “why “ say something like:
>
>
>
>
>
> “Some spatial data applications , such as aircraft  navigation , [more?]
> require highly accurate data. If the positional accuracy is published
> together with the data, the user can determine whether it is appropriate to
> use for an application. Potentially, this makes existing data more
> re-usable.
>
>
>
>
>
> Kerry
>
>
>
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