Mamadou:
Good to know Senegal is on task! Yes, now I see on the Senegal wiki
page the same issue I am raising. I think I agree with the comment about
using trunk for "maybe only the (roads) with the highest quality (at
least two lanes of good asphalt) and major topological roles."
My take is that trunk designation should indeed be limited to paved
roads with at least 2 full size lanes (that means at least 7 meters wide
= two 3.5 meter lanes). 7 meters wide (+ 1.5 meters on each side, so
total of 10 meter wide base) is the new standard now used Senegal and
Mali I think. This is in line with the 3.5-meter wide European lane
standard and the 12-foot wide US lane standard.
If Senegal is planning some sessions in 2014 that I feel it might be the
best place to make a proposal to further clarify the standards. I will
subscribe to the mailing list to stay in the loop.
Sincerely,
Vincent Dawans.
On 3/4/2014 12:51 PM, Mamadou bassirou THIAM wrote:
Hi there,
Welcome Vincent and many thanks for your message.
Overall, I can confirm your remarks on West African ground.
A first clarification to bring is that Highway Tag Africa
<http://wiki.openstreetmap.org/wiki/Highway_Tag_Africa> is actually
an initiative, for now.
After an active mappy year, a stunning lack was the absence of a
consensual and appropriate
data model for West Africa, roads in particular. You can go through
the Issuessection of
OSM Senegal Wiki Project
<http://wiki.openstreetmap.org/wiki/WikiProject_Senegal>that underline
same questions that you evoked.
This situation is also linked to the real states of our West African
roads in question.
Not easy to figure out the most appropriate OSM tag for each of them
and the Dakar's motorway is still being built (its a new one).
But, It was necessary to start working with something to complete
further large discussions.
Although incomplete this wiki is an important step to build the West
Africa data model and preset.
It very helpful for OSM Senegal and the other HOT activations.
More implication from our dear president will be much appreciated and
I think, even it's all wiki,
it was written based on collective agreement, so I won't recommend a
single person to update it directly.
There are two key events in our 2014 program that will help improve
this situation.
Quality assurance sessions to redraw and finalize the SN highway layer and
A workshop with mappers and organizations interested in OSM data to
determine how to
rationalize harmonize our edits and how to make information matches needs.
You can stay turned by subscribing to our mailing list
<https://lists.openstreetmap.org/listinfo/talk-sn>also.
Discussions will re-open shortly, hope to catch you online or why not
bump into you in Dakar, since you're a traveler!
MisterBass
Saint-Louis, Senegal.
http://twitter.com/bassthiam
On Tue, Mar 4, 2014 at 1:20 PM, Mikel Maron <mikel_ma...@yahoo.com
<mailto:mikel_ma...@yahoo.com>> wrote:
Hi Vincent
Welcome! I don't have direct experience of these roads, but from
my perspective, sounds like a reasonable and informed approach.
Hopefully people working in the region will share their ideas on
this. I just wanted to say, that you should also feel free to
contact directly other people who have edited the wiki page (check
the History), and other people who have edited these roads in OSM.
And yes, remember, it's all a wiki, so even if it's two steps
forward, one step back, collaboratively getting everything into
the commons doesn't require permission.
Cheers
Mikel
* Mikel Maron * +14152835207 @mikel s:mikelmaron
On Monday, March 3, 2014 9:15 PM, Vincent Dawans
<dawa...@gmail.com <mailto:dawa...@gmail.com>> wrote:
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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