I hope that displaying a small preview map will help with the most obvious of these bugs.
2013/1/17 <[email protected]> > I’ll just mention a data quality problem that’s annoyed me with DBpedia > so far. > > People often get confused if longitude is east or west, so they get the > sign wrong. If you plot coordinates from Wikipedia you find a shadow image > of Europe, for instance, reflected across the prime meridian. It turns > out, however, there are a bunch of shipwrecks and seamounts out there too. > > It would be nice to see these cleaned up. > > *From:* Denny Vrandečić <[email protected]> > *Sent:* Thursday, January 17, 2013 10:13 AM > *To:* Discussion list for the Wikidata > project.<[email protected]> > *Subject:* Re: [Wikidata-l] Coordinate datatype -- update > > Nine decimals is what is used for WAAS reference stations, which appear > in Wikipedia. > > < > http://en.wikipedia.org/wiki/Wide_Area_Augmentation_System#List_of_reference_stations > > > > I actually also think it is a bit excessive, but it is there and looks > legit. I'd rather support it than not (and save 20 MB of disk space). > > Some of the validations sound useful (no values greater than 360), others > a bit restrictive (same number of decimal places). I'd prefer the software > to be rather lax than draconic (it *is* a wiki, after all). > I agree about trailing zeros. They are covered by the precision parameter. > > Thanks for the input! > Cheers, > Denny > > > > > 2013/1/17 Andy Mabbett <[email protected]> > >> On 17 January 2013 10:19, Denny Vrandečić <[email protected]> >> wrote: >> > If you have any further comments on the datatype for coordinates, say so >> > here. >> >> > < >> http://meta.wikimedia.org/wiki/Wikidata/Development/Representing_values#Coordinate >> > >> >> Nine decimal places seems excessive. >> >> We can apply some rudimentary validation: no latitude or longitude >> values greater than 360, for instance (perhaps other criteria >> dependent on the coordinate system); latitude and longitude should >> have the same number of decimal places; trailing zeroes are >> significant and must not be discarded. >> >> -- >> Andy Mabbett >> @pigsonthewing >> http://pigsonthewing.org.uk >> >> _______________________________________________ >> Wikidata-l mailing list >> [email protected] >> https://lists.wikimedia.org/mailman/listinfo/wikidata-l >> > > > > -- > Project director Wikidata > Wikimedia Deutschland e.V. | Obentrautstr. 72 | 10963 Berlin > Tel. +49-30-219 158 26-0 | http://wikimedia.de > > Wikimedia Deutschland - Gesellschaft zur Förderung Freien Wissens e.V. > Eingetragen im Vereinsregister des Amtsgerichts Berlin-Charlottenburg unter > der Nummer 23855 B. Als gemeinnützig anerkannt durch das Finanzamt für > Körperschaften I Berlin, Steuernummer 27/681/51985. > > ------------------------------ > _______________________________________________ > Wikidata-l mailing list > [email protected] > https://lists.wikimedia.org/mailman/listinfo/wikidata-l > > > _______________________________________________ > Wikidata-l mailing list > [email protected] > https://lists.wikimedia.org/mailman/listinfo/wikidata-l > > -- Project director Wikidata Wikimedia Deutschland e.V. | Obentrautstr. 72 | 10963 Berlin Tel. +49-30-219 158 26-0 | http://wikimedia.de Wikimedia Deutschland - Gesellschaft zur Förderung Freien Wissens e.V. Eingetragen im Vereinsregister des Amtsgerichts Berlin-Charlottenburg unter der Nummer 23855 B. Als gemeinnützig anerkannt durch das Finanzamt für Körperschaften I Berlin, Steuernummer 27/681/51985.
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