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Re: Geo Spatial and time information

From: Hugh Glaser <hg@ecs.soton.ac.uk>
Date: Mon, 11 Aug 2008 20:13:38 +0100
To: Cristiano Longo <cristiano.longo@tvblob.com>
CC: "semantic-web@w3.org" <semantic-web@w3.org>, link <link@ecs.soton.ac.uk>
Message-ID: <C4C64DF2.2652E%hg@ecs.soton.ac.uk>

Yes, not straightforward if you want to search like that.
Let's say there was a fest in Messina.
So you will record the place as something like
But now, as you say, you can't do the search you want (easily).
So you would need to record the other information you might want, such as
http://dbpedia.org/resource/Sicily and
But I guess that you were going to record something like that in any case,
so using these URIs loses you nothing, and gets you the geolocation data as
well (geo:lat, geo:long).
The good news is that you could use dbpedia to fill in some of the extra
information automatically (ie when you add a festival entry).
The Messina page gives you p:region http://dbpedia.org/resource/Sicily
Which gives p:zone http://dbpedia.org/resource/South_Italy
(I may have got some of the details wrong.)

So hopefully it gives you a some advantage to do it this way.
And then the next thing is people finding you.
So for example, make sure that sindice.com knows about your rdf; then when
an agent is searching for stuff about Messina, it will find your festival

Does anyone have any better suggestions?


On 08/08/2008 14:38, "Cristiano Longo" <cristiano.longo@tvblob.com> wrote:

> Thank you, very good job. But really i can't understand how I could make
> a query that involves information in my knowledge base and from another
> one. For example, suppose that I stored in my KB all the festivals in
> Italy, recording also the city (simply an uri) where this event holds.
> How I can  get  all the festival in Sicily? For instance, is should get
> all the cities of sicily  from your  (remote)  KB and  get all the
> fests in these ones  from my KB.
> Hugh Glaser wrote:
>> Sounds good.
>> Being a bit brave and presumptuous, I would suggest that it would be good to
>> avoid putting the actual geo-location data in your KB.
>> I think the Linked Data (and Semantic Web?) way, is to find a KB that has
>> the geo-location of places, and then use those places (as URIs), at least
>> when possible, in your KB.
>> So places such as
>> http://dbpedia.org/About
>> http://www.geonames.org/ontology/
>> Or our http://unlocode.rkbexplorer.com/
>> All have URIs for places and then things like lat/long and name information
>> for the place, and these URIs can be resolved to get it.
>> Even if you can't use the remote data live, then you can usually download
>> the RDF to your own store, which will give you the possibility of being
>> webby later.
>> And, of course, it will all mean that you don't need to find out any of the
>> geo-location information yourself!
>> Good luck.
>> Hugh
>> --
>> Hugh Glaser,  Reader
>>               Dependable Systems & Software Engineering
>>               School of Electronics and Computer Science,
>>               University of Southampton,
>>               Southampton SO17 1BJ
>> Work: +44 (0)23 8059 3670, Fax: +44 (0)23 8059 3045
>> Mobile: +44 (0)78 9422 3822, Home: +44 (0)23 8061 5652
>> http://www.ecs.soton.ac.uk/~hg/
>> On 08/08/2008 10:28, "Cristiano Longo" <cristiano.longo@tvblob.com> wrote:
>>> Hi all, I'm setting up a knowlege base to store festivals and other
>>> folkloristic stuffs. So at first I need a vocaboulary (owl-dl) for
>>> geospatial information (countries - regions - cities  and coordinates of
>>> these items)  and  calendar ones  (when a festival start and stop).
>>> What is the state of the art for the representation of this kind of
>>> information in owl-dl?
>>> thanks in advance,
>>> Cristiano Longo
Received on Monday, 11 August 2008 19:14:38 UTC

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