[HOT] (hotosm#711) Wells in Kayes/Mali?

Pierre Béland pierzenh at yahoo.fr
Fri Oct 31 02:36:53 UTC 2014

Yes this is what I refer to.
While this is not very clear, we see what looks like structure. They can have various forms and dimensions  but there is generally a cement base.

This Google search for images shows various examples.https://www.google.ca/search?q=image+pompe+eau+mali&rls=org.mozilla:fr:official&biw=1252&bih=560&tbm=isch&imgil=Ox530FxyMx8ioM%253A%253Bwn25dMEfvasGvM%253Bhttp%25253A%25252F%25252Fmaliactu.info%25252Fsociete%25252Fplaine-de-san-ouest-les-rates-incessants-de-la-station-de-pompage&source=iu&pf=m&fir=Ox530FxyMx8ioM%253A%252Cwn25dMEfvasGvM%252C_&usg=__IQln6GAPsN7nsHf13xPEE680hZk%3D&ved=0CCgQyjc&ei=X_VSVLPcFoS3yATtqIHAAQ

      De : S Volk <svolk2 at hotmail.com>
 À : Pierre Béland <pierzenh at yahoo.fr>; "hot at openstreetmap.org" <hot at openstreetmap.org> 
 Envoyé le : Jeudi 30 octobre 2014 22h15
 Objet : RE: [HOT] (hotosm#711) Wells in Kayes/Mali?
#yiv8460560668 #yiv8460560668 --.yiv8460560668hmmessage P{margin:0px;padding:0px;}#yiv8460560668 body.yiv8460560668hmmessage{font-size:12pt;font-family:Calibri;}#yiv8460560668 Thanks Pierre,is this what you say was on top left (I zoomed in to put it the center of screen)?:http://www.openstreetmap.org/edit?editor=id&%20#map=22/14.44208/-11.46070
(if isn't, may you send the URL?)
Also this structure looked to me what you talked as circular livestock marks around what may be a well (and many wells have a thick beam on the top, that perhaps split the mark of shadow in two; this place is right on the contact of two aerial images, but shows a circle around; I zoomed to the center): http://www.openstreetmap.org/edit?editor=id&%20#map=21/14.44327/-11.46493Is it what you talked?
Yes, I guess some little trees constrated may look black spots.Sergio

Date: Fri, 31 Oct 2014 01:37:03 +0000
From: pierzenh at yahoo.fr
To: svolk2 at hotmail.com; hot at openstreetmap.org
Subject: Re: [HOT] (hotosm#711) Wells in Kayes/Mali?


after exchanging with Andrew on what we both see on the screen, I realize that looking at my screen with a certain angle, contrasts where better to see paths but the colors of certains objects are affected. In this image, with a certain angle, trees contrast is particularly exegarated and make them look as black spots.
On the top left corner of the place I now see what looks to be a well. Pierre 

      De : Pierre Béland <pierzenh at yahoo.fr>
 À : S Volk <svolk2 at hotmail.com>; "hot at openstreetmap.org" <hot at openstreetmap.org> 
 Envoyé le : Jeudi 30 octobre 2014 18h43
 Objet : Re: [HOT] (hotosm#711) Wells in Kayes/Mali?
Wells are an important information to provide. But the Bing Imagery shows exactly what I was talking about before. If we look in the streets around, we see various water pools that could be left after heayv rain. 

To my point of view, we cannot conclude from this imagery that there is a well. I do not see a structure that would confirm a well in the midlle of the place. 

It is not easy to spot these from aerial imagery. For the Mali Activation, north of Mali early 2013, we could find wells with traces like a propeller around the well. This is done by using livestock moving around to lift the water out of the well.  Pierre 

      De : S Volk <svolk2 at hotmail.com>
 À : "hot at openstreetmap.org" <hot at openstreetmap.org> 
 Envoyé le : Jeudi 30 octobre 2014 17h49
 Objet : [HOT] (hotosm#711) Wells in Kayes/Mali?

#yiv8460560668 #yiv8460560668 --.yiv8460560668ExternalClass #yiv8460560668ecxyiv1579724980 body.yiv8460560668ecxyiv1579724980hmmessage {font-size:12pt;font-family:Calibri;}#yiv8460560668 If it's useful:
-Example of recently constructed well in Didieni/Mali (mounts of debris around, walls don't rise above (redundant redundancy) the ground):http://appropriateprojects.com/node/1022
-What seems new wells in Kayes, too (debris seen, walls not seen; seems square hole, possibly on the going of digging at the moment of satellite image):http://www.openstreetmap.org/edit?editor=id&%20#map=20/14.44191/-11.46058
Screen Capture:

Regards, Sergio

 #yiv8460560668 #yiv8460560668 --.yiv8460560668ExternalClass #yiv8460560668ecxyiv1579724980 .yiv8460560668ecxyiv1579724980ExternalClass body.yiv8460560668ecxyiv1579724980ecxhmmessage {font-size:12pt;font-family:Calibri;}#yiv8460560668  
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