[HOT] Thank you from MSF!

Sun Apr 7 17:48:15 UTC 2019

Some countries in Africa have their own tagging Standards

https://wiki.openstreetmap.org/wiki/Namibian_Tagging_Standards

https://wiki.openstreetmap.org/wiki/South_African_Tagging_Guidelines

I think we should  encourage all local communities to develop their own
guidelines

For national  road reference systems we would either need odbl
compatible open data or help from people with local knowledge.

Hot related projects  are following (they try to) most of the time the
https://wiki.openstreetmap.org/wiki/Highway_Tag_Africa guidelines

Ralf

On 07.04.19 19:11, Walker Kosmidou-Bradley wrote:
> Dear Kevin,
>
> In many countries, the country designations are mapped to the OSM
> conventions and then the Main, District, or Local to which you allude
> could be a part of the ref/number.  Afghanistan has a pretty simple
> process to go from from OSM to national data
> (https://wiki.openstreetmap.org/wiki/Highway_Tag_Afghanistan) please
> note that this highway tag list was adapted from the fine work done
> for https://wiki.openstreetmap.org/wiki/Highway_Tag_Africa.
>
> In Afghanistan, the government knows that OSM secondary roads are
> “district roads” and the ref number reflects that, e.g. D320781
> (Secondary) and NH1010 (Trunk), Afghanistan doesn’t use the motorway
> designation from OSM.  If they need to change the tag after
> downloading, a simple if/than script can make the adjustment in a
> couple minutes.
>
> I’m happy to learn more how other folks have tackled this issue.
>
> Best,
>
> Walker
>
> On Apr 7, 2019, at 21:30, Kevin McPherson via HOT
> <hot at openstreetmap.org <mailto:hot at openstreetmap.org>> wrote:
>
>> [External]
>> 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.
>>
>> "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.
>>
>> 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:
>>
>> https://wiki.openstreetmap.org/wiki/Key:highway
>>
>> uses "Motorway", "Trunk", "Primary", "Secondary" etc. while a
>> national roads agency might use other terminology such as "Main",
>> "District", "Local" etc.
>>
>> 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.
>>
>> 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.
>>
>> Would be grateful for anyone's views on this.
>>
>> Regards, Kevin McPherson
>>
>>
>>
>>
>> On Saturday, April 6, 2019, 3:34:19 PM GMT+1, Ralf Bernhardt
>> <raabee at gmx.de <mailto:raabee at gmx.de>> wrote:
>>
>>
>> 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.
>>
>> Ralf
>>
>> On 06.04.19 13:29, John Whelan wrote:
>> There is another wiki guide
>>
>> https://wiki.openstreetmap.org/wiki/Highway_Tag_Africa
>>
>> 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.
>>
>> 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.
>>
>> Cheerio John
>>
>> Frans Schutz wrote on 2019-04-06 6:27 AM:
>>> Hello Ralf
>>>
>>> you pinpoint to a situation which is not always clear.
>>> First of all. we ty to keep ourselves to the East African Highway
>>> tagging wiki
>>> https://wiki.openstreetmap.org/wiki/East_Africa_Tagging_Guidelines
>>>
>>> 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.
>>> I hope you get an understanding how we have to deal with this subject.
>>> Best regards
>>> Frans Schutz
>>> Validator
>>>
>>>
>>>
>>> Op 5-4-2019 om 20:10 schreef Ralf Bernhardt:
>>>> Interesting when compared to the openstreetmap data.
>>>>
>>>> There are many POIs I would like to see on Openstreetmap too, also
>>>> boundarys and place names.
>>>>
>>>> I also noticed a different tagging scheme: Car, Moto and Foot. I would
>>>> guess that Roads not passable for a car but by foot and moto should be
>>>> highway=path in OSM.
>>>>
>>>> But most of them are still tagged as unclassified or residential. Is
>>>> there a reason for that or will you change them later?
>>>>
>>>> _______________________________________________
>>>> HOT mailing list
>>>> HOT at openstreetmap.org <mailto:HOT at openstreetmap.org>
>>>> https://lists.openstreetmap.org/listinfo/hot
>>>
>>
>> --
>> Sent from Postbox
>> <https://www.postbox-inc.com/?utm_source=email&utm_medium=siglink&utm_campaign=reach>
>> _______________________________________________
>> HOT mailing list
>> HOT at openstreetmap.org <mailto:HOT at openstreetmap.org>
>> https://lists.openstreetmap.org/listinfo/hot
>> _______________________________________________
>> HOT mailing list
>> HOT at openstreetmap.org <mailto:HOT at openstreetmap.org>
>> https://lists.openstreetmap.org/listinfo/hot
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/hot/attachments/20190407/8a62c483/attachment.html>