Thanks Sebastian & Pablo for your responses.
I checked, as you suggested, the live endpoint but the problem persists.
Not on all the points, for example Melbourne is okay, but
http://live.dbpedia.org/page/Prahran,_Victoria still has two geo:lat
objects.
I also would like to note that this page is not in sync with Wikipedia page
of Prahran. I'm thinking of the possibility that the extractors source code
is okay now, but
not when the articles were extracted.
Last update of this Wikipedia page is 18 July 2012. I checked the added
triples on http://live.dbpedia.org/liveupdates/2012/07/18/ but there is no
reference to the Prahran resource.
And thanks, I also like the images. When it's done I will upload them at
the wiki.
Salut!
*--Castells--*
http://jcastellssala.wordpress.com
On Thu, Jul 26, 2012 at 7:58 AM, Sebastian Hellmann <
[email protected]> wrote:
> Hello Jordi,
> these are nice images, maybe you can add them and/or your project to
> wiki.dbpedia.org and link it at:
> http://wiki.dbpedia.org/Applications
>
> For the generation of geocoordinates a two step process is involved, which
> includes some Java/Scala code, i.e. the Geoparser and also some mapping
> rules
> in the Mappings Wiki http://mappings.dbpedia.org/
> for example see the Geocoordinate mapping on
> http://mappings.dbpedia.org/index.php/Mapping_en:Infobox_settlement
>
> I would suggest the following:
> DBpedia 3.8 is almost ready and maybe the bug with the duplicates is fixed
> already, so we don't have to do anything.
> You might also want to try the live endpoint:
> http://live.dbpedia.org/resource/Melbourne
>
> All the best,
> Sebastian
>
>
> Am 25.07.2012 15:35, schrieb jordi castells:
>
> Hello
>
> I have been working with dbpedia the last months, I also asked something
> about the point values on the mailing list,
> and you already gave me good advice on other semantic datasets to check.
>
> I continued working with dbpedia because I want other information provided
> about the Points datasets, relations, wikipedia abstracts etc.
>
> But I would like to ask again the question on how the point values are
> generated. Recently I plotted DBpedia points on a
> map:http://i.imgur.com/lVVbQ.png
> To determine the most populated zones. There are some errors, but I assume
> that it's okay, it is impossible
> not to have errors.
>
> What worries me is the kind of duplication found on
> Australia:http://i.imgur.com/fTAwb.png
>
> For example, the N-triples for Melbourne lat,lon are the following:
> ---<http://dbpedia.org/resource/Melbourne>
> <http://dbpedia.org/resource/Melbourne> <
> http://www.w3.org/2003/01/geo/wgs84_pos#lat>
> <http://www.w3.org/2003/01/geo/wgs84_pos#lat> "37.8136"^^<
> http://www.w3.org/2001/XMLSchema#float>
> <http://www.w3.org/2001/XMLSchema#float>
> .<http://dbpedia.org/resource/Melbourne>
> <http://dbpedia.org/resource/Melbourne> <
> http://www.w3.org/2003/01/geo/wgs84_pos#lat>
> <http://www.w3.org/2003/01/geo/wgs84_pos#lat> "-37.8136"^^<
> http://www.w3.org/2001/XMLSchema#float>
> <http://www.w3.org/2001/XMLSchema#float>
> .<http://dbpedia.org/resource/Melbourne>
> <http://dbpedia.org/resource/Melbourne> <
> http://www.w3.org/2003/01/geo/wgs84_pos#long>
> <http://www.w3.org/2003/01/geo/wgs84_pos#long> "144.963"^^<
> http://www.w3.org/2001/XMLSchema#float>
> <http://www.w3.org/2001/XMLSchema#float> .
> ---
>
> Repeating the latitude with positive and negative values. making it
> impossible for a machine to determine the correct place.
> Other points have duplicated latitudes or longitudes, but those are so
> close that it makes no big difference (like
> http://dbpedia.org/page/Ben_Lomond,_California<http://dbpedia.org/page/Saratoga,_California>
> <http://dbpedia.org/page/Saratoga,_California>
> ).
>
> This is why I write to the mailing list. To point out those errors, ask
> again how the geo:lat, geo:lon predicates are populated, and to offer my
> help if I can do something to improve it.
>
> Salut!
>
> *--Jordi Castells--*http://jcastellssala.wordpress.com
>
>
>
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>
> _______________________________________________
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>
>
>
> --
> Dipl. Inf. Sebastian Hellmann
> Department of Computer Science, University of Leipzig
> Events:
> * http://sabre2012.infai.org/mlode (Leipzig, Sept. 23-24-25, 2012)
> * http://wole2012.eurecom.fr (*Deadline: July 31st 2012*)
> Projects: http://nlp2rdf.org , http://dbpedia.org
> Homepage: http://bis.informatik.uni-leipzig.de/SebastianHellmann
> Research Group: http://aksw.org
>
>
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