[Tagging] Let's put more wikipedia-tags in OSM WAS Re: [OSM-dev] Some Questions about the Collaboration of OpenStreetMap and Wikipedia

[Zhijie Shen]

On Fri, Feb 25, 2011 at 1:16 AM, M∡rtin Koppenhoefer <dieterdreist at gmail.com
> wrote:

> 2011/2/24 Zhijie Shen <zjshen14 at gmail.com>:
> > I'm student who is currently working on using OpenStreetMap to facilitate
> > our project. Now I want to retrieve Wikipedia entry from OpenStreetMap to
> > fertilize the data source for our project. To do this, I crawled OSM
> data,
> > and found there are few wikipedia tags in my test region... I guess that
> the wikipedia entry on
> > OpenStreetMap is added manually. Am I correct?
>
>
> Yes, they are added manually. If you wanted to put them on the map
> without reference to an OSM-Object you could simply take the
> coordinates that wikipedia gives you for geotagged articles and
> display them as an overlay. We cannot (AFAIK) import those coordinates
> into OSM because we believe that they were mainly created from
> Googlemaps hence constitute a derived database [1].
>
If I have the geotagged articles, I can display it on OSM. However, my
computation logic is that during parsing the OSM data, the wikipedia entries
of the corresponding entities (e.g., node, way) should be crawled if they
exist. The problem is that many entities have the corresponding wikipedia
entries, but the wikipedia tags haven't been added in the OSM data. Hence
only relying on wikipedia tags may overlook much potential knowledge.

Yes, I agree the coordinates cannot be directly imported into OSM,
otherwise, some inconsistence issues may occur.

>
> Today I was looking at some places (countries, states and cities) and
> found that despite some wikipedia links most of them are actually
> missing.
>
> I invite everybody to look in his region for features (not only
> place-features) to see, if they are already linked to wikipedia. In
> case they are not I suggest to add a tag in the form:
> wikipedia=<language-code>:<article-name>
> as suggested here:
> http://wiki.openstreetmap.org/wiki/Key:wikipedia
>
> e.g.
> wikipedia=en:London
> or
> wikipedia=it:Hong_Kong
>
> (copy the value from the URL to avoid typos).
>
> It is generally sufficient to add 1 wikipedia-tag for one language, as
> all the others can be fetched from the interlanguage links Wikipedia
> is offering. Only in rare cases there might be need for additional
> tags for different languages (in cases where the wikipedia structure
> for different languages is differing, e.g. some languages have a
> specific article, in other languages the same feature is described
> inside the article of another thing).
>
In addition to manual editing by contributors, I'm also thinking about
creating wikipedia tags or retrieving wikipedia entries automatically by
analyzing the information from the current OSM data.

>
> cheers,
> Martin
>
> PS: This would also make a beautiful project of the month...
>
> [1]
> http://wiki.openstreetmap.org/wiki/Wikipedia#Importing_geodata_from_Wikipedia
>



-- 
Zhijie Shen
School of Computing
National University of Singapore
<http://www.comp.nus.edu.sg/%7Ez-shen/>
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