Bienvenue Vincent ! To keep this thread about Tag classification in Western Africa [trunk] comprehensive of all contributions, I pasted in Will's view which I equally support.
I like Will's comment about the dynamic at play here and the fact that more and more trunks are under construction in this area of the world; this has been massive in SN, over the last 10 years for example. trunk is needed and I like your definition Vincent which is straight and comes with metrics easy to figure out. Nico ---------- Forwarded message ---------- From: Will Skora <skorasau...@gmail.com> Date: Tue, Mar 4, 2014 at 10:22 PM Subject: [HOT] Introducting myself + questions about "Highway Tag Africa" standards To: hot@openstreetmap.org Cc: Augustin Doury <augustin.do...@hotosm.org> 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? On Tue, Mar 4, 2014 at 10:32 PM, Mamadou bassirou THIAM < m.bassirou.th...@gmail.com> wrote: > > +1 For your trunck definition suggestion > > > On Tue, Mar 4, 2014 at 9:09 PM, Vincent Dawans <dawa...@gmail.com> wrote: > >> 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 >> Issues section 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>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> >>> 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 >>> >>> _______________________________________________ >>> HOT mailing list >>> HOT@openstreetmap.org >>> https://lists.openstreetmap.org/listinfo/hot >>> >>> >>> >>> _______________________________________________ >>> HOT mailing list >>> HOT@openstreetmap.org >>> https://lists.openstreetmap.org/listinfo/hot >>> >>> >> >> > > _______________________________________________ > HOT mailing list > HOT@openstreetmap.org > https://lists.openstreetmap.org/listinfo/hot > > -- Nicolas Chavent Humanitarian OpenStreetMap Team http://hot.openstreetmap.org/ Mobile (FRA): +33 (0)6 52 40 78 20 Email: nicolas.chav...@hotosm.org Email: nicolas.chav...@gmail.com Skype: c_nicolas Twitter: nicolas_chavent
_______________________________________________ HOT mailing list HOT@openstreetmap.org https://lists.openstreetmap.org/listinfo/hot
