Hey there- Back from Senegal a couple of days ago and will blog soon around the TechCamp, the flooding and the status of OSM there
First thanks to all those who contributed to this response: the progresses of the map are important and your work had a strong impact down there amongst the TechCamp participants as well as among GISers I met from the UN, Gov Agency, Academics and Techs. Furthermore it fostered the remobilization of the nascent Senegalese OSM community by heating things up. A few point on this tagging thread. * highway values most likely to be used and fit for these areas of Dakar, I'd like to echo Will and others on *residential*, and strongly support Jaakko's views on *path *(vs footway) which seems well suited for the most narrow streets. I would refrain when mapping remotely to use living_street which calls for on-the-ground knowledge and de facto right of way between vehicle and pedestrians. This is a tag to better explain/ portray and push to the mappers down there. More generally, with Jaakko, Brian and Sev we feel a need to better articulate guide on using highway values below tertiary in developing countries. * surface values: I would use from the imagery *paved/unpaved*, a great deal of unpaved roads in Pikine and Guediawaye are *sand* * On the squares/ piazzas, I feel like Harry and would refrain from tagging them leisure=*pitch/ playground* and/or *parking* since those uses are really changing over time in the course of the day. Those usages also apply to a good deal of streets where as a kid, I learned playing street soccer and hanged out for long hours in wedding/ funerals and later party. I would then stick to Harry's call: highway=pedestrian and area=yes + drawing roads (highway=residential) along the edges of the area * Flooding related tags. I like the work started by Stephane and think that it would be worth taking advantage of this flooding to solidify and generate consensus on the tags In the mapping party we held in Dakar last Saturday, we pushed forward the following tags to map on the ground the worst hit areas in the view of building a datasest of flood prone points. hazard_prone=yes hazard_type=flood 2012:flood_height= 2009:flood_height= 2007:flood_height= We will be waiting for satellite imagery processing to get the various extents (OCHA tasked UNOSAT to carry out such a work with imagery requested through the Charter) Again thanks. Nico On Wed, Sep 5, 2012 at 10:13 PM, Mike Dupont <[email protected] > wrote: > Ok, we had had a good bootcamp so far, about 70 people, tomorrow we will > start working on sengal. > mike > > > On Wed, Sep 5, 2012 at 5:06 PM, william skora <[email protected]>wrote: > >> Hi, >> >> Apologies for the delays. Here's some answers to a few questions. >> "In some cases of >> really narrow, hardly visible streets or deep inside a residential >> area I've used living_street because I assume pedestrians or children >> playing football use them more often than cars." >> >> Regarding the tags of ways, we've done a great job so far, given the >> ambiguity of the areas, osm tags, and current situation. As most of >> you have consistently tagged, a majority of the ways as >> highway=residential (which is appropriate, mostly houses are very >> small businesses, run out of the home or as a storefront). >> >> However, as discussed in the quoted portion and in this picture >> http://imgur.com/AuNTC - there are a few ways that are not very wide >> and deserve more consideration. >> I did a very rough measurement using the measurement plugin and bing >> imagery, the one in the examples are ~3.5 meters wide, just wide >> enough for a smaller car or typical taxi. In my experience in dakar >> for several months, some of these ways still have cars pass through >> them, although may or may not receive a little less traffic than >> other, wider streets that are marked as residential . However, there >> are also many ways, with different levels of visibility on bing >> imagery, that aren't wide enough for a car to go through, surrounded >> by residential buildings (likely the best tag for those, >> highway=footway. When I first started mapping dakar, I tagged the >> narrow ways as highway=service. In a few cases that I surveyed in >> person, I've tagged them as highway=footway. In summary, on the ground >> surveying would provide the context and information that the bing >> imagery can't provide so I'm not sure what tags would be most >> appropriate for these narrower ways without on the ground surveying. I >> hesistate to use highway=living_street >> http://wiki.openstreetmap.org/wiki/Living_street since there aren't >> (as far as I know) any traffic laws that categorize these narrower >> ways than from other residential ways. >> >> I spoke to one mapper on the ground in Dakar who told me the >> areas/ways that Harry mentioned in a conversation a couple days ago >> are used mostly by kids as play areas; so leisure=pitch ? or >> playground ? (although there's no equipment ?). >> >> Lastly, there are some areas that are more floodprone than others. >> Personally, I would hesistate for others to tag them ([based solely on >> bing imagery] and think this may be a job most appropriate to those >> who are on the ground or have been. What tags have been used ? Any >> recommended strategies ? >> >> Regards, >> will. >> >> _______________________________________________ >> HOT mailing list >> [email protected] >> http://lists.openstreetmap.org/listinfo/hot >> > > > > -- > James Michael DuPont > Member of Free Libre Open Source Software Kosova http://flossk.org > <http://flossk.org>Saving wikipedia(tm) articles from deletion > http://SpeedyDeletion.wikia.com > Contributor FOSM, the CC-BY-SA map of the world http://fosm.org > Mozilla Rep https://reps.mozilla.org/u/h4ck3rm1k3 > > > _______________________________________________ > HOT mailing list > [email protected] > http://lists.openstreetmap.org/listinfo/hot > > -- Nicolas Chavent Humanitarian OpenStreetMap Team http://hot.openstreetmap.org/weblog/ http://wiki.openstreetmap.org/wiki/WikiProject_Haiti Mobile (Haiti): +509 4617 3334 Mobile (FRA): +33 (0)6 52 40 78 20 Email: [email protected] Email: [email protected] Skype: c_nicolas Twitter: nicolas_chavent
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