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Re: Are we covering linear referencing?

From: Frans Knibbe <frans.knibbe@geodan.nl>
Date: Mon, 22 Aug 2016 15:13:25 +0200
Message-ID: <CAFVDz406Unfhr4d8yyDJnfDpES-XpkJVmBim6Ubv5qS8W054pA@mail.gmail.com>
To: Scott Simmons <ssimmons@opengeospatial.org>
Cc: Rob Atkinson <rob@metalinkage.com.au>, Ed Parsons <eparsons@google.com>, SDW WG Public List <public-sdw-wg@w3.org>
OK, I was wondering whether linear referencing data fall in the coverage
category or in in the other category (spatial things that can be described
by geometry). But probably it is both, depending on what the data are
about. If it is something like the location of lampposts along a road it is
1D  geometry data using a 2D reference system and if its something like
water levels in a river (a continuous phenomenon) it's probably coverage
data.

This kind of data is popular in the transportation sector, especially where
transport takes place over fixed infrastructure (roads, railways, canals
...). I wonder if this type of data has requirements that are not addressed
yet by current specifications like GeoSPARQL or CovJSON.

Regards,
Frans



On 22 August 2016 at 14:39, Scott Simmons <ssimmons@opengeospatial.org>
wrote:

> OGC Abstract Specification Topic 2 (Spatial Referencing by Coordinates)
> covers simple linear systems (continuous measurements). For more complex
> cases, the main standard is ISO 19133.
>
> Scott
>
> On Aug 22, 2016, at 5:24 AM, Rob Atkinson <rob@metalinkage.com.au> wrote:
>
> I think it falls under re-use of vocabularies again - i.e. for linear
> referencing one should ideally look to an OGC standard, and we should look
> to the basic spatial ontology proposal to make sure that positioning is
> general enough to be a linear reference.
>
> Rob
>
> On Mon, 22 Aug 2016 at 19:11 Ed Parsons <eparsons@google.com> wrote:
>
>> I would suggest its rather an edge case, most common in the Architecture,
>> Engineering and Construction (AEC) part of the  industry... I think we have
>> bigger fish to fry...
>>
>> Ed
>>
>>
>> On Mon, 22 Aug 2016 at 09:38 Frans Knibbe <frans.knibbe@geodan.nl> wrote:
>>
>>> Hello all,
>>>
>>> I just wondered if the practice of linear referencing
>>> <https://en.wikipedia.org/wiki/Linear_referencing> (a.k.a. dymanic
>>> segmentation) is also covered by our work. I guess this type of data falls
>>> in the coverage category. Will there be examples of linear referencing in
>>> the coverage deliverables or perhaps in the BP deliverable?
>>>
>>> Regards,
>>> Frans
>>>
>>> --
>>
>> *Ed Parsons *FRGS
>> Geospatial Technologist, Google
>>
>> Google Voice +44 (0)20 7881 4501
>> www.edparsons.com @edparsons
>>
>
>
Received on Monday, 22 August 2016 13:13:54 UTC

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