<div dir="ltr"><div class="gmail_default" style="font-family:trebuchet ms,sans-serif">For your reference</div><div class="gmail_default" style="font-family:trebuchet ms,sans-serif"><br></div><div class="gmail_default" style="font-family:trebuchet ms,sans-serif">1 Ghana
Driver’s Guide ** <span style="background-color:rgb(255,255,0)">make reference to page 3</span>. </div><div class="gmail_default" style="font-family:trebuchet ms,sans-serif"><a href="https://mrh.gov.gh/wp-content/uploads/2022/09/Ghana-Drivers-Guide-_Final_Signed.pdf">https://mrh.gov.gh/wp-content/uploads/2022/09/Ghana-Drivers-Guide-_Final_Signed.pdf</a></div><div class="gmail_default" style="font-family:trebuchet ms,sans-serif"><br></div><div class="gmail_default" style="font-family:trebuchet ms,sans-serif">2 Speed limits on Ghana roads</div><div class="gmail_default" style="font-family:trebuchet ms,sans-serif"><a href="https://www.youtube.com/watch?v=7flkwDk2Buc">https://www.youtube.com/watch?v=7flkwDk2Buc</a></div><div class="gmail_default" style="font-family:trebuchet ms,sans-serif"><br></div><div class="gmail_default" style="font-family:trebuchet ms,sans-serif">for all other references which were not accessible from my earlier email see below.:</div><div class="gmail_default" style="font-family:trebuchet ms,sans-serif"><br></div><div class="gmail_default" style="font-family:trebuchet ms,sans-serif"><a href="https://drive.google.com/file/d/181DZYKNOA-ispSR-tEqyRLFmizzKPLvp/view?usp=sharing">https://drive.google.com/file/d/181DZYKNOA-ispSR-tEqyRLFmizzKPLvp/view?usp=sharing</a></div><div class="gmail_default" style="font-family:trebuchet ms,sans-serif"><br></div><div class="gmail_default" style="font-family:trebuchet ms,sans-serif">Regards </div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Nov 4, 2024 at 6:33 PM Enock Seth Nyamador via Talk-gh <<a href="mailto:talk-gh@openstreetmap.org">talk-gh@openstreetmap.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi Mawutor and TomTom,<br>
<br>
My comments are not meant to be in anyway harsh towards any person or <br>
group of persons. Unfortunately, I only tell about the reality of the <br>
results of such mapping campaigns which tend reside in OSM for who knows <br>
how long. It is ok to know that some communication have been done with <br>
the community in Ghana but where is this publicly? Any OSM wiki page or <br>
discussions? I am afraid to say if some regulation say roads in urban <br>
areas are eg. 30 km/h doesn't mean we should assume and map all roads <br>
with 30 km/h, even if there are no existing street signs or on roads <br>
that lead nowhere. How do other mappers verify these contributions?<br>
<br>
I must say issues need not arise always, most of them can be easily and <br>
should be avoided. We can make OpenStreetMap better if these kinds of <br>
mapping are discussed in the wider community, well documented, avoided <br>
or corrected in their early stages.<br>
<br>
Unfortunately, the references you shared are not accessible.<br>
<br>
Best,<br>
Enock<br>
<br>
On 04.11.24 17:38, Stephen Mawutor Donkor wrote:<br>
><br>
> Thank you, Enock, for sharing the reference links; they will be <br>
> valuable in expanding on the ongoing investigation of the speed limit <br>
> data collection conducted in Accra by the TomTom Team.<br>
><br>
> I'd like to add that the TomTom Team didn't carry out this project <br>
> independently; they engaged closely with our community. The project <br>
> involved selected members of the YouthMappers community in Ghana, <br>
> though participation was limited to fewer than 20 trained individuals <br>
> who contributed to the mapping, for your information this campaign was <br>
> excluded of newbies; as you mentioned other wise. one needed to be an <br>
> intermediate or advance mapper to join the team.<br>
><br>
> Some issues have already been flagged, and Tomtom is/are exploring <br>
> ways to addressing them.<br>
><br>
> We’ve noticed instances where some participants didn’t refer to <br>
> Mapillary road sign data from our closing conversations, and in other <br>
> cases, certain speed limits recorded did not align with the reference <br>
> standards we were using.<br>
><br>
> While I feel that some feedback has been a bit harsh, I also believe <br>
> we are all here to learn from others and our own experiences. When <br>
> mistakes happen, it’s essential to focus on constructive solutions and <br>
> use them as learning curves/opportunities for all, not just be.<br>
><br>
> Make ref to:<br>
><br>
> [Ref_1] where some of the mappers shared ground truff data just to <br>
> validate their data<br>
><br>
> [Ref_4]the mappers were taught how to use mappillary data. sadly the <br>
> data doesn't cover much. We want as much as conducting a mappillary <br>
> campaign but you guess it is as good as mine.<br>
><br>
> [Ref_2] some strange speed limits on highways<br>
><br>
> [Ref_3] when mappers were unsure about what to do brough the <br>
> conversation back to the group.<br>
><br>
> once again, thank you for your continuous interest in the quality of <br>
> data coming Ghana and in the OSM ecosystem, I would like to encourage <br>
> you to continually share your constructive feedback for the betterment <br>
> of the community and solutions to make some of these processes smoother.<br>
><br>
> thank you<br>
> Mawutor<br>
><br>
><br>
> ref_4: <br>
> <a href="https://drive.google.com/file/d/1Hmn7BiQnNuj-bagFPmOogFEJFsUTO6eF/view?usp=drive_link" rel="noreferrer" target="_blank">https://drive.google.com/file/d/1Hmn7BiQnNuj-bagFPmOogFEJFsUTO6eF/view?usp=drive_link</a><br>
><br>
> ref_3: <br>
> <a href="https://drive.google.com/file/d/14YRssyg1a7NOxAh6G4iSKqetdxTRRkpj/view?usp=drive_link" rel="noreferrer" target="_blank">https://drive.google.com/file/d/14YRssyg1a7NOxAh6G4iSKqetdxTRRkpj/view?usp=drive_link</a><br>
><br>
> ref_2: <br>
> <a href="https://drive.google.com/file/d/1y5Qd-KbhR4a6UXHa0SryyC8uZCN2yDOz/view?usp=drive_link" rel="noreferrer" target="_blank">https://drive.google.com/file/d/1y5Qd-KbhR4a6UXHa0SryyC8uZCN2yDOz/view?usp=drive_link</a><br>
><br>
> ref_1: <br>
> <a href="https://drive.google.com/file/d/1UOQXSjyBvD0ee8Mkmum4yL2TNQ9rdU6o/view?usp=drive_link" rel="noreferrer" target="_blank">https://drive.google.com/file/d/1UOQXSjyBvD0ee8Mkmum4yL2TNQ9rdU6o/view?usp=drive_link</a><br>
><br>
><br>
> On Mon, Nov 4, 2024 at 12:31 PM Enock Seth Nyamador via Talk-gh <br>
> <<a href="mailto:talk-gh@openstreetmap.org" target="_blank">talk-gh@openstreetmap.org</a>> wrote:<br>
><br>
> Dear Hajar and TomTom (mappers),<br>
><br>
> In reference to my comments on your maxspeed=* mapping in Accra [1].<br>
> There are multiple frightening maxspeed=* from this mapping which are<br>
> completely unverifiable. I also see roads which of course lead<br>
> nowhere<br>
> and were results of other organised mapping campaigns tagged with<br>
> maxspeed=* without any further investigation.<br>
><br>
> I would have expected that this kind of organised mapping is<br>
> discussed<br>
> publicly and documented on the OSM Wiki. As of 2024-08-23, there is<br>
> only one road in Accra on OSM with verifiable speed limit of 100 km/h<br>
> [2]. Seeing roads in dense Accra Central even with existing adjacent<br>
> verifiable maxspeed=50 tagged with higher maxspeed=90/100 [3][3a]<br>
> makes<br>
> me wonder. I have also seen lower maxspeed values where there<br>
> exist some<br>
> street-level images to validate eg. way [4] (maxspeed=30) and<br>
> Mapillary<br>
> image [5] (street sign 50).<br>
><br>
> TomTom's mapping team I believe is better aware and in the<br>
> position to<br>
> post-process all roads wherever and add whatever desired speed, see<br>
> Default speed limits [6], but outsourcing to a bunch of newbies to<br>
> add<br>
> into OSM, is not what OpenStreetMap is about.<br>
><br>
> As I have always commented on this list and elsewhere there is<br>
> just too<br>
> much useless data from many undocumented organised mapping<br>
> activities in<br>
> Ghana that needs to be deleted in the end, hence we don't want to see<br>
> new problems that will never be fixed.<br>
><br>
> The practice of setting up a series of maproulette or HOTOSM Tasking<br>
> manager instance projects and letting it fix itself is not helping<br>
> but<br>
> continues take place from multiple actors in Ghana and elsewhere.<br>
><br>
> Please kindly find the best way to undo all maxspeed=* resulting from<br>
> this organised mapping campaign without damaging existing valid ones<br>
> e.g. manually, contact DWG, etc.<br>
><br>
> 1. <a href="https://maproulette.org/browse/challenges/48926" rel="noreferrer" target="_blank">https://maproulette.org/browse/challenges/48926</a><br>
> 2. <a href="https://overpass-turbo.eu/s/1TCn" rel="noreferrer" target="_blank">https://overpass-turbo.eu/s/1TCn</a><br>
> 3.<br>
> <a href="https://www.openstreetbrowser.org/#map=17/5.54911/-0.20774&basemap=osm-mapnik&categories=car_maxspeed" rel="noreferrer" target="_blank">https://www.openstreetbrowser.org/#map=17/5.54911/-0.20774&basemap=osm-mapnik&categories=car_maxspeed</a><br>
> 3a<br>
> <<a href="https://www.openstreetbrowser.org/#map=17/5.54911/-0.20774&basemap=osm-mapnik&categories=car_maxspeed3a" rel="noreferrer" target="_blank">https://www.openstreetbrowser.org/#map=17/5.54911/-0.20774&basemap=osm-mapnik&categories=car_maxspeed3a</a>>.<br>
> <a href="https://overpass-turbo.eu/s/1TCC" rel="noreferrer" target="_blank">https://overpass-turbo.eu/s/1TCC</a><br>
> 4. <a href="https://www.openstreetmap.org/way/169135203/history/7" rel="noreferrer" target="_blank">https://www.openstreetmap.org/way/169135203/history/7</a><br>
> 5.<br>
> <a href="https://www.mapillary.com/app/?lat=5.551382553813923&lng=-0.19400795959847983&z=19.9&pKey=517473239420891&focus=photo" rel="noreferrer" target="_blank">https://www.mapillary.com/app/?lat=5.551382553813923&lng=-0.19400795959847983&z=19.9&pKey=517473239420891&focus=photo</a><br>
> <<a href="https://www.mapillary.com/app/?lat=5.551382553813923&lng=-0.19400795959847983&z=19.9&pKey=517473239420891&focus=photo" rel="noreferrer" target="_blank">https://www.mapillary.com/app/?lat=5.551382553813923&lng=-0.19400795959847983&z=19.9&pKey=517473239420891&focus=photo</a>><br>
> 6. <a href="https://wiki.openstreetmap.org/wiki/Default_speed_limits" rel="noreferrer" target="_blank">https://wiki.openstreetmap.org/wiki/Default_speed_limits</a><br>
><br>
> Best,<br>
> Enock<br>
><br>
><br>
> _______________________________________________<br>
> Talk-gh mailing list<br>
> <a href="mailto:Talk-gh@openstreetmap.org" target="_blank">Talk-gh@openstreetmap.org</a><br>
> <a href="https://lists.openstreetmap.org/listinfo/talk-gh" rel="noreferrer" target="_blank">https://lists.openstreetmap.org/listinfo/talk-gh</a><br>
><br>
><br>
><br>
> -- <br>
> Stephen Mawutor Donkor<br>
> M: +233 (020) 8254044<br>
> T: @stevdok<br>
> S: stevdok<br>
><br>
><br>
> /"Mere philosophy will not satisfy us.We cannot reach the goal by mere <br>
> words alone.Without practice, nothing can be achieved" - Sri S. <br>
> Satchidananda/<br>
<br>
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</blockquote></div><br clear="all"><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><font face="trebuchet ms, sans-serif"><font size="1">Stephen</font> <font size="4">Mawutor</font> <font size="1">Donkor </font></font><div><font face="trebuchet ms, sans-serif">M: +233 (020) 8254044</font></div><div><font face="trebuchet ms, sans-serif">T: @stevdok</font></div><div><font face="trebuchet ms, sans-serif">S: stevdok</font></div><div><font face="trebuchet ms, sans-serif"><br></font></div><div><font face="trebuchet ms, sans-serif"><br></font></div><div><i style="color:rgb(53,28,117);font-family:"trebuchet ms",sans-serif;line-height:16px"><font size="1">"Mere philosophy will not satisfy us.We cannot reach the goal by mere words alone.Without practice, nothing can be achieved" - Sri S. Satchidananda</font></i><font face="trebuchet ms, sans-serif"><br></font></div></div></div></div></div>