The problem is not just to record co-ordinates, but to do something with
them. This means identifying services that can evaluate poistion functions,
such as computing proximity, comparing regions, converting between
co-ordinates and place names, or following through the hierarchy of
administrative districts. (01)
Also, given that there are a large number of co-ordinate systems actually
in use (often based on different shapes for the Earth), there
will also be a requirement for services to convert between different
co-ordinate systems. (02)
It may be worth considering separating out the concept of position from the
representation of position, to allow for position to be represented using
multiple co-ordinate systems or geographic regions. (03)
Sean Barker
Bristol, UK (04)
> -----Original Message-----
> From: ontolog-forum-bounces@xxxxxxxxxxxxxxxx
> [mailto:ontolog-forum-bounces@xxxxxxxxxxxxxxxx] On Behalf Of John F.
> Sowa
> Sent: 25 October 2010 14:20
> To: ontolog-forum@xxxxxxxxxxxxxxxx
> Subject: Re: [ontolog-forum] GPS coordinates in an ontology?
>
>
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> On 10/25/2010 8:48 AM, Joshua Lieberman wrote:
>> Depending on the required precision, GPS coordinates may or may not be
>
>> something to enshrine in a static ontology, and a GPS point may or may
>
>> not be the appropriate geometric representation.
>
> I strongly agree.
>
> Every application is likely to need other domain-dependent
> representations, such as a street address. And it is also likely to
> need various transformations, such as deriving speed down those roads
> and streets.
>
> All the units of measure are interrelated, and the ontology should
> include all of them.
>
> John
> (05)
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