[HOT] Senegal - Dakar Flooding Activation

Mike Dupont jamesmikedupont at googlemail.com
Wed Sep 5 21:13:37 BST 2012


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 <skorasaurus at gmail.com> 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.
>
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James Michael DuPont
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