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<p>Interesting, I assume you are both aware of:</p>
<p><a class="moz-txt-link-freetext" href="http://wiki.openstreetmap.org/wiki/OSM_tags_for_routing/Access-Restrictions">http://wiki.openstreetmap.org/wiki/OSM_tags_for_routing/Access-Restrictions</a></p>
<p>which covers just part of the problem space. For example to do it
properly you need to normalize vehicle types, add rules for
standing/parked vehicles and so on.<br>
</p>
<p>Simon<br>
</p>
<br>
<div class="moz-cite-prefix">Am 24.11.2016 um 17:54 schrieb Michael
Maier:<br>
</div>
<blockquote cite="mid:58371B28.2010001@student.tugraz.at"
type="cite">
<pre wrap="">On 17/11/16 11:51, Per Eric Rosén wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Hi!
I have been making a few maps and applications using OSM data, mostly
stored in postgis. In all cases, I have had to make custom carto rules /
database post-processing / application rules to compensate for multiple
ways of expressing the same information in OSM. Also, in some cases,
for taking care of which tag implies which information.
Is there some way of doing this just once; for example with some
parseable implication database, and library? There is some "implies" on
the wiki; but it's not completely chine-readable in a reliable way.
Such a database would probably also need being optionally keyed on
country, "highway=cycleway" may imply different rules in different
countries for example.
Would such a tool/database be useful, if not existing already?
</pre>
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<pre wrap="">
Definitely, I would have needed such a tool a few times already.
</pre>
<blockquote type="cite">
<pre wrap="">
I see two somewhat different usage cases, and I don't know if the same
tool/database should be used for both:
1. normalizing a database before usage, for example changing
"highway=ford" to "ford=yes" and moving to modern lifecycle tags
(it could be argued that this shoud be done on the main OSM database
by a bot, but data consumers could probably have larger or more
specific needs of normalization compared to what can be agreed to do
by changing the master OSM data)
2. getting specific implications without writing it to a database, for
example highway=cycleway implies bicycle=yes, foot=yes in country X
</pre>
</blockquote>
<pre wrap="">
I would suggest to start a project to use Wikidata for that:
• create a Wikidata object for every key and for every key=value pair of
interest.
• Link them together with
· subclass_of (P279¹) for key=value to key
· when two tags are meant for the same objects, set P460²
· for “implies” I haven't found a property yet, is that possible?
• replace the currently used P1282³ with a new property linking to the
new Wikidata entries for tags
[1] <a class="moz-txt-link-freetext" href="https://www.wikidata.org/wiki/Property:P279">https://www.wikidata.org/wiki/Property:P279</a>
[2] <a class="moz-txt-link-freetext" href="https://www.wikidata.org/wiki/Property:P460">https://www.wikidata.org/wiki/Property:P460</a>
[3] <a class="moz-txt-link-freetext" href="https://www.wikidata.org/wiki/Property:P1282">https://www.wikidata.org/wiki/Property:P1282</a>
Who would be willing to join the effort?
Thanks,
Michael
</pre>
<blockquote type="cite">
<pre wrap="">
best regards
Per Eric Rosén
--
^): Per Eric Rosén <a class="moz-txt-link-freetext" href="http://rosnix.net/~per/">http://rosnix.net/~per/</a>
/ <a class="moz-txt-link-abbreviated" href="mailto:per@rosnix.net">per@rosnix.net</a> GPG 7A7A BD68 ADC0 01E1 F560 79FD 33D1 1EC3 1EBB 7311
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