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<div>Dear all, I am new to this HOT interface on OSM, but joined last week, and interested in road classification in OSM. This is my first posting, and first time I have engaged with anyone on OSM, so am still getting up to speed.<br></div><div><br></div><div>"Road Classification" is an important topic for roads agencies, it helps define the funding and prioritisation for development and maintenance of the road network in a country.</div><div><br></div><div>With regards to OSM, one issue is that the <highway> tag in OSM is never quite the same as the official definition of the country. For example, the highway tag:<br></div><div><br></div><div><a href="https://wiki.openstreetmap.org/wiki/Key:highway" rel="nofollow" target="_blank">https://wiki.openstreetmap.org/wiki/Key:highway</a></div><div><br></div><div>uses "Motorway", "Trunk", "Primary", "Secondary" etc. while a national roads agency might use other terminology such as "Main", "District", "Local" etc. <br></div><div><br></div><div>What this means is that the road network classification in OSM is never quite the same as that used by the Roads Agency, and there are discrepancies between the "official" data of the roads agency, and the OSM definition. This causes confusion to anyone who wants accurate mapping.<br></div><div><br></div><div>As part of my work, I am trying to encourage Roads Agencies to review OSM mapping, to compare with their official definitions, and to update OSM based on their own records. However, the differences in the classification terminologies are a barrier to this. Every country potentially has a different classification system. We have been discussing internally that an extra "layer" on top of OSM might be a way forward, but that is an overhead and requires extra cost and administration.</div><div><br></div><div>Would be grateful for anyone's views on this.</div><div><br></div><div>Regards, Kevin McPherson<br></div><div><br></div><div><br></div><div><br></div><div><br></div>
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On Saturday, April 6, 2019, 3:34:19 PM GMT+1, Ralf Bernhardt <raabee@gmx.de> wrote:
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<p>My point this time is not the classification of a few roads. What
I learn from this, is that our data is processed and reviewed
again. If a mapping error is detected by local staff, it will most
likely only be reported to their own mapping department. It will
also only be fixed locally. We as mappers or validators will never
learn from this process. All errors will remain in the OSM
Database. That might be understandable in an emergency situation
like now. But without direct feedback from map users we will
never improve. We should also demand that more local knowledge
will be shared with OSM. A simple thank you is not enough.</p>
<p>Ralf<br clear="none">
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<div class="ydpf8af174yiv6308088458yqt1676662925" id="ydpf8af174yiv6308088458yqt17987"><div class="ydpf8af174yiv6308088458moz-cite-prefix">On 06.04.19 13:29, John Whelan wrote:<br clear="none">
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</blockquote></div></div><div class="ydpf8af174yiv6308088458yqt1676662925" id="ydpf8af174yiv6308088458yqt96572"><div><div style="font-size:12pt;font-family:Verdana;">There is
another wiki guide <br clear="none">
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<a shape="rect" href="https://wiki.openstreetmap.org/wiki/Highway_Tag_Africa" rel="nofollow" target="_blank">https://wiki.openstreetmap.org/wiki/Highway_Tag_Africa</a><br clear="none">
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both get updated from time to time. As a general rule of thumb
I tag highways between settlements as unclassified not track, I
leave it to the local mappers to say if it is a higher
classification. Occasionally I'll tag as high as tertiary.
Normally I leave the tags alone but have been known to retag
motorways between two small settlements as unclassified.<br clear="none">
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I think step one is to get something mapped. Step two is
correct it and with lots of new mappers with different ideas
we'll always see some problems.<br clear="none">
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Cheerio John <br clear="none">
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<span>Frans Schutz wrote on 2019-04-06 6:27 AM:</span><br clear="none">
<blockquote type="cite">Hello
Ralf
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you pinpoint to a situation which is not always clear.
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First of all. we ty to keep ourselves to the East African
Highway tagging wiki
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<a shape="rect" class="ydpf8af174yiv6308088458moz-txt-link-freetext" href="https://wiki.openstreetmap.org/wiki/East_Africa_Tagging_Guidelines" rel="nofollow" target="_blank">https://wiki.openstreetmap.org/wiki/East_Africa_Tagging_Guidelines</a>
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Different mappers judge different how to tag a highway. Out of
my own experience lots of mappers (and validators) struggle
with how to tag a highway. Looking to the importance, the
routing, and the width of the highway, which is hard to
measure from a satellite image, we have to decide. A big
number of new mappers are joining us and have different ideas
(nor no idea at all) how to tag a highway. I've seen taggings
as secondary highway as a connection to 2 hamlets and so on.
So we try to tag as good as possible, but often it is a
(calculated)guess which tag is relevant. Take also in account
that there is a huge time pressure on these disaster mapping
projects, so sometimes you accept the tagging as they were
made. When there is no time pressure you can take a look to
each highway and decide.
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I hope you get an understanding how we have to deal with this
subject.
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Best regards
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Frans Schutz
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Validator
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Op 5-4-2019 om 20:10 schreef Ralf Bernhardt:
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<blockquote type="cite">Interesting when compared to the
openstreetmap data.
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There are many POIs I would like to see on Openstreetmap
too, also
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boundarys and place names.
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I also noticed a different tagging scheme: Car, Moto and
Foot. I would
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guess that Roads not passable for a car but by foot and moto
should be
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highway=path in OSM.
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But most of them are still tagged as unclassified or
residential. Is
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there a reason for that or will you change them later?
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</blockquote>
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<div class="ydpf8af174yiv6308088458moz-signature">-- <br clear="none">
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