[HOT] Mapping Bassikounou, Mauritania - ICRC request
Christian Lenz (clenzch)
hot at clenz.ch
Thu Mar 6 22:40:07 UTC 2014
Pierre, merci beaucoup pour ta proposition. I started exactly as you
propose, in principle following the tagging guide line in the wiki.
Does it make sense to tag "small" areas with "flood_prone"? Maybe the
whole area is flood prone during rainfall events. We don't know how old
the water is. Is it ground water? Was it raining a few days before? I
think it's in the middle of a desert...
Checking the available Bing imagery
(http://mvexel.dev.openstreetmap.org/bingimageanalyzer/#) I found that
the images are mainly from Aug/2010 - Oct/2011. According to:
http://de.climate-data.org/location/766672/ it seems (more or less)
reasonable that the images might have been during a rainy time.
So my point is: Isn't there the possibility that we see much more water
than there is "in reality"? It might even be very seldom that flooding
occurs...
Is there any possibility to get IR channel imagery of Bing or someone
else with high enough resolution? Maybe we could use them to distinguish
deep water wells from shallow (and temporarily) flooded zones?
Chris
On 03/06/2014 11:23 PM, Pierre Béland wrote:
> Hi Christian,
>
> This is more or less man_made, like the ponds inside habitation walls.
>
> Went back to https://wiki.openstreetmap.org/wiki/Key:water.
>
> I propose that we follow the suggestion to use the tag combination
> natural=water
> water=pond.
>
> Pierre
>
> ------------------------------------------------------------------------
> *De :* Christian Lenz (clenzch) <hot at clenz.ch>
> *À :* hot at openstreetmap.org
> *Envoyé le :* Jeudi 6 mars 2014 17h07
> *Objet :* Re: [HOT] Mapping Bassikounou, Mauritania - ICRC request
>
> Should we tag the ponds with "landuse=pond" or with "natural=water"
> and "water=pond"? For me it looks like the ponds are more natural than
> man_made... Or does anyone find some good guideline to distinguish man
> made ponds?
>
> Chris
>
>
>
>
> On 03/06/2014 10:59 PM, Pierre Béland wrote:
>> I cannot spot water wells. The pattern I see in this area is that
>> there is often what seems to be a pond inside the walls of habitations.
>>
>> Andrew and others might be better then me to spot if any water wells.
>>
>>
>> Pierre
>>
>> ------------------------------------------------------------------------
>> *De :* Severin Menard <severin.menard at gmail.com>
>> <mailto:severin.menard at gmail.com>
>> *À :* Pierre Béland <pierzenh at yahoo.fr> <mailto:pierzenh at yahoo.fr>
>> *Cc :* "hot at openstreetmap.org" <mailto:hot at openstreetmap.org>
>> <hot at openstreetmap.org> <mailto:hot at openstreetmap.org>
>> *Envoyé le :* Jeudi 6 mars 2014 16h07
>> *Objet :* Re: [HOT] Mapping Bassikounou, Mauritania - ICRC request
>>
>> Hi Pierre,
>>
>>
>>
>>
>> On Thu, Mar 6, 2014 at 8:10 PM, Pierre Béland <pierzenh at yahoo.fr
>> <mailto:pierzenh at yahoo.fr>> wrote:
>>
>> Hi Severin
>>
>> In this Task Manager job descripton, there are examples give of
>> Intermittent ponds
>> url=http://www.bing.com/maps/?v=2&cp=kn5s43gh3j74&lvl=19&dir=0&sty=b&form=LMLTCC
>>
>> If you zoom-out, it seems that all this zone is flood_prone. I
>> think tha a polygon should be trace around all the zone with the
>> tag flood_prone=yes, plus identify the more permanent ponds. I
>> mapped rapidly inside Bassikounou and have mapped a few of the
>> flood_prone areas as an example.
>>
>> I checked on OpenCycleMap and seems this area is not as low as
>> Bassikounou itself. But I can ask the ICRC Watasan local staff in
>> charge of the field assessment.
>>
>>
>> The film about the water well operation is interesting wit the
>> cattles operating around the well. For Mali activation we were
>> able to spot such wells by observing odd looking "fans" around
>> them in the aerial imagery made by the cattles circulation.
>>
>> Interesting. can you recognize such situation around Bassikounou?
>> Would be good to document this with the examples provided through the
>> discussions for Mali
>>
>>
>> See discussion for Mali
>> https://wiki.openstreetmap.org/wiki/HOT/Mali_Activation_Discussion_with_humanitarians_2013-02-18#Discussion_of_water_wells
>>
>>
>> Pierre
>>
>> ------------------------------------------------------------------------
>> *De :* Severin Menard <severin.menard at gmail.com
>> <mailto:severin.menard at gmail.com>>
>> *À :* "hot at openstreetmap.org <mailto:hot at openstreetmap.org>"
>> <hot at openstreetmap.org <mailto:hot at openstreetmap.org>>
>> *Envoyé le :* Jeudi 6 mars 2014 12h14
>> *Objet :* [HOT] Mapping Bassikounou, Mauritania - ICRC request
>>
>> Hi,
>>
>> ICRC requested us to map an AOI (Area Of Interest) around
>> Bassikounou, a town close to the border with Mali, for a
>> development project about drinkable water. The approach is the
>> same than for Walikale in DRC. To know
>> more: http://tasks.hotosm.org/job/447
>>
>> As you can see, I added a banner to make clear what the job is
>> from, for and about. For sure HTML and wording could be improved,
>> please make suggestions.
>>
>> The map features are a bit more various than usual (eg
>> intermittent ponds - please find a link provided by the local
>> Watsan specialist tp have an idea how to identify them on Bing
>> imagery - and trees).
>>
>> I also added a picture and a video of Bassikounou that I found in
>> the web, to have a better idea of what look like the streets and
>> the outskirts.
>>
>> Sincerely,
>>
>> Severin
>>
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