[HOT] Introducting myself + questions about "Highway Tag Africa" standards

Tue Mar 4 21:22:57 UTC 2014

 Hi Vincent,

Welcome :)

I honestly don't recall why trunk roads were not included in the
highway Africa tags page. As Mikel noted, these standards are elastic
and subject to change. You brought up some good points.

I do recall that when I first started mapping in Western Africa that
the main routes (such as the one from Dakar to St. Louis and N1 in
Senegal, were a mix of trunk and primary).

Regarding the absence of motorways in the guide, it was likely that because
that motorway (whose name escapes me) from Dakar to Rufisique is the
one of the very few motorways (I've been on it myself during HOT's
project in Senegal, June '12) in western AFR, it wasn't included in
the highway standard and there's very few others in AFR.
Perhaps, we should include it into the HIghway Africa Tags since they
are increasingly being built there.

On a related note, highway=trunk isn't included in the HDM Preset and
I'm not sure why.
http://wiki.openstreetmap.org/wiki/Humanitarian_OSM_Tags/HDM_preset -
http://hot.openstreetmap.org/updates/2013-06-07_humanitarian_data_model_redux
Thoughts?

J'ai ajoute Gus et M. Thiam, 2 deux volontariats dans le communite
senegalaise. Nous voudrions vos avis a le classification et discutez
svp  :)
Désolée, je doit retourner a travailler maintenant, donc, je ne peut
traduire mon message entier.

Regards,
Will

> Message: 2
> Date: Mon, 03 Mar 2014 18:14:37 -0800
> From: Vincent Dawans <dawansv at gmail.com>
> To: hot at openstreetmap.org
> Subject: [HOT] Introducting myself + questions about "Highway Tag
>         Africa" standards
> Message-ID: <5315370D.3090802 at gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"; Format="flowed"
>
> Hello:
>
> My name is Vincent Dawans and I am a Senior Technical Advisor at Virtue
> Ventures, a technical firm dedicated to supporting NGOs and social
> enterprises in the developing world.As a technical advisor, I do a lot
> of traveling. I am currently traveling to West Africa every 3 months or
> so. I was last in Mali and got really impressed with the accuracy of the
> openstreetmap layer (I was using the MapWithMe android app that gets its
> data from openstreetmap); certainly the level of details in Bamako is
> quite impressive, enough that I was able to go on long walks through the
> back streets without ever getting lost.Seeing all that good work got me
> interested in getting involved.
>
> One of the organizations I work with is a village-banking organization
> around Kayes (Western Mali) and my plan is to give them gps receivers so
> they can start mapping the many villages in which they work. I got some
> old $25 gps receivers online that I will try using for that purpose...
>
> I also stared updating the map for Kayes itself (it needs some
> attention). However as I am looking at the "Highway Tag Africa"
> standards I am a bit confused as to the lack of mention of the
> "highway=trunk" and "highway=motorway" tags.
>
> I am going to take West Africa as an example since this is what I know.
> I feel like the main regional roads should be consistently marked as
> "trunk" and not merely "primary".Right now some sections are marked
> trunk, other primary. By "regional roads" I mean mostly the roads that
> are part of the new Trans-African Highway Network that is taking
> shape.The Trans-African Highway Network comprises a series of east/west
> and north/south roads crossing the continent. Here is a good overview of
> the Trans-African Highway Network:
> http://en.wikipedia.org/wiki/Trans-African_Highway_network
>
> My personal experience with that network is the Trans-Sahelian Highway
> (Trans-African Highway 5), more specifically its first section running
> from Dakar to Ouagadougou which I use on a regular
> basis.http://en.wikipedia.org/wiki/Dakar-Ndjamena_Highway.The section
> running from Dakar to Ouagadougou actually splits into 2 branches from
> Tambacounda, Senegal to Kita, Mali (one branch is the original northern
> road via Kayes Mali, and the other one is the brand new southern road
> via Kenieba and Kati, Mali.).
>
> I feel that these roads would benefit from being more
> consistently"upgraded" from primary to trunk because they are not only
> important roads for their respective countries but are in fact becoming
> the backbone of the road network in their respective regions and serve
> as the primary roads crisscrossing the continent.  IMHO they fit the
> official trunk definition of "The most important roads in a country's
> system that aren't motorways."
>
> Whatever decision is made, some clarification is necessary because right
> now some sections of that network are already marked as trunk on the
> map, but in a very inconsistent manner, with some trunk roads becoming
> primary mid way without reflecting actual changes on the ground. Here is
> just one example for illustration purpose: in Senegal the trunk tag
> starts in Kaffrine and ends in Kotiari, then it becomes trunk once more
> in Mali between Segala and Bamako. In reality there is no reason why the
> Dakar-Kaffrine section and Tambacounda-Segala section should not be
> marked as trunk as well -- or all of it marked as primary; but not a mix
> of both...
>
> Additionally, the highway=motorway tag also needs to be clarified; on
> the map, motorways are already found, mostly in Northern and Southern
> Africa with some also starting to show up in East and West Africa. For
> instance right now there is a short motorway running from Dakar to
> Rufisque-- it's a real motorway, a restricted access road build as per
> international standards -- a first in West Africa I think.
>
> Hence I think the "Highway Tag Africa" guidelines would benefit from
> being expanded with trunk roads and motorway; if nothing to clarify the
> current mixed used of motorway, trunk and primary tags. I would love to
> know what the opinion of the community is on this matter. I am willing
> to help draft some changes to the guidelines if there is some buy-in for
> the general idea presented here.
>
> I am new to this mailing list and community, so I apologize if this was
> discussed earlier or if I am not fully informed about the issue. Thank
> you for reading my long (too long) email.
>
> Sincerely,
>
> Vincent Dawans
>
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