Re: [linking-data] What else links to my subject of interest?

Hello,

I think this issue could do with a clearer description of what the problem
is. As I understand it, the problem is not so much that one needs to know
which data links to a certain spatial object, but that a spatial object can
have multiple representations that can have slightly different properties,
which could cause problems. Is that correct?

In that case the problem is that there is a need for authoritative
reference data. For example, governmental data sets that provide elaborate,
high quality data on administrative areas (including geometry and its
history of course), which can be reused by anyone wanting to say or publish
something about such an area. With such authoritative reference data in
place it would be easy to use the same identifiers for locations, and to
find data about those locations on the web.

Greetings,
Frans

By the way, did you know that the classic expression used by cartographers
to warn for unknown (dangerous) areas was 'Hic sunt leones' (here be lions)
(see this wikipedia article about terra incognita
<https://en.wikipedia.org/wiki/Terra_incognita#Details>)?



2015-09-29 2:18 GMT+02:00 <Simon.Cox@csiro.au>:

> FWIW there is a somewhat related discussion underway on the locadd list –
> concerning different types of address.
>
> The issue is that the same ‘identifier’ may have more than one spatial
> object associated with it.
>
> Sometimes these are different types (PO Box vs physical location). You
> can’t rely on the initial minters to have been careful about the uniqueness
> of the identifier. There be dragons indeed.
>
>
>
> *From:* Jon Blower [mailto:j.d.blower@reading.ac.uk]
> *Sent:* Tuesday, 29 September 2015 7:13 AM
> *To:* Jeremy Tandy <jeremy.tandy@gmail.com>
> *Cc:* SDW WG Public List <public-sdw-wg@w3.org>
> *Subject:* Re: [linking-data] What else links to my subject of interest?
>
>
>
> This question also relates to the general problem of annotation. One of
> the strengths of Linked Data is that anyone can provide information about
> anything but the problem, as this thread discusses, is that discovering
> these annotations is hard.
>
>
>
> The CHARMe project (http://www.charme.org.uk) developed an annotation
> system for climate data, based on Linked Data. Essentially it aims to be a
> (single) repository for such annotations, which may include publications
> written about data, free-text comments, etc.
>
>
>
> I don’t know how you might discover annotations from the Web at large, if
> the can be published literally anywhere. Maybe there needs to be an engine
> crawling and harvesting RDF…
>
>
>
> Cheers,
>
> Jon
>
>
>
> On 24 Sep 2015, at 16:57, Jeremy Tandy <jeremy.tandy@gmail.com> wrote:
>
>
>
> From discussions on yesterday's call:
>
>
>
> ----
>
>
>
> BillRoberts sees this problem occur routinely. Statistical data (expressed
> in RDF Data Cubes for example) often relates to geographic and
> administrative areas. Many statistical datasets may use the same "spatial"
> dataset. A common use case is to look for other statistics relating the
> subject administrative area.
>
>
>
> Beware that there is no limit to how many times resources may have linked
> to (referred to) a given subject area ... there may be thousands of
> 'back-links'. How do we prioritise which ones to show/use?
>
>
>
> (BillRoberts says that the situation is quite easy if you have all the
> necessary information in your triple-store - or even if you can federate
> your query across a number of known SPARQL end-points. However, what about
> the "unknowns" - how do you discover what else is "out there" that refers
> to your subject? How do you find third party content? This is a
> discoverability concern ['''see related theme "enabling discovery"'''])
>
>
>
> Is there a place for (domain-specific) catalogues where one can register
> assertions about / references to a subject? For example [http://sameas.org
> sameas.org] provides a place where owl:sameAs assertions can be
> registered ... perhaps, say, data.gov.uk could allow open data publishers
> to register information about resources that are identified in URISets in
> the data.gov.uk domain???
>
>
>
> (Ed notes that "there be dragons" when you're trying to reconcile
> different statistical data that assert that they are (apparently) talking
> about the same location or area ... )
>
>
>
> On Thu, 24 Sep 2015 at 09:35 Jeremy Tandy <jeremy.tandy@gmail.com> wrote:
>
> Email thread for collecting discussion on the question: "What else links
> to my subject of interest?"
>
>
>
> The related wiki entry for this questions is here [1]
>
>
>
> For instructions about how to engage with this discussion, please see my
> previous email [2].
>
>
>
> Many thanks. Jeremy
>
>
>
> [1]:
> https://www.w3.org/2015/spatial/wiki/Linking_Data#What_else_links_to_my_subject_of_interest.3F
> <https://www.w3.org/2015/spatial/wiki/Linking_Data#How_can_I_describe_links_in_my_format_of_choice.3F>
>
>
> [2]: https://lists.w3.org/Archives/Public/public-sdw-wg/2015Sep/0044.html
>
>
>
>
>