[HOT] Fwd: huts.

Pierre Béland pierzenh at yahoo.fr
Tue Feb 17 16:49:20 UTC 2015


Look also at this thread in december this same subject where I provided some links to images.Humanitarian OpenStreetMap (HOT) - [Feature Interpretation] #817 - Guinea, Kankan East
 Pierre 

      De : Severin Menard <severin.menard at gmail.com>
 À : Rod Bera <rod at goarem.org> 
Cc : "hot at openstreetmap.org" <hot at openstreetmap.org> 
 Envoyé le : Mardi 17 février 2015 11h14
 Objet : Re: [HOT] Fwd: huts.
   
Hi,

To get an idea of what look like the huts you may find hard to identify on the imagery,
you can have a look on this video of a small plane landing on Zemio airstrip in Central African Republic, especially just before the plane lands. It shows well what you can see here. And you figure out that the round brown shapes are obvious nice huts. I put that on Zemio TM job to help the contributors: usually when creating a job I check if there is no video showing the situation from the ground. In South Sudan it made me figure out what I thought were walls are actually wooden fences.

Sincerely,

Severin

On Tue, Feb 17, 2015 at 11:16 AM, Rod Bera <rod at goarem.org> wrote:

 

 Hi John and everyone,
 
 These huts definitely are for living. 
 
 Again (see my e-email below), the bigger ones are permanent shelters i.e. homes. 
 The smaller ones are strorage (granaries), containing food for a whole family (or more) for a whole year (in the best of cases, just after harvesting) or less (depending on time in year and amounts of previous harvest. One or two successive bad harvests most likely means famine).
 
 These huts (or squared equivalents) are the only possible housing when people live 
    
   - with less than $2.15 a day (as is the case for 516 millions in Sub-Saharan Africa alone, 1.934 billions globally) and
   - in rural areas (which in Sub-Saharan Africa make 77% of those below the $2.15 poverty line).
 Figures are from UN-Habitat2003. Obviously they have increased since then. When I am talking of $2.15, this is obviously not pocket money. It's generally speaking the economic equivalent of the food they produce and eat, etc.
 
 77% (this figure is higher than elsewhere in the world, where the majority of poverty has moved to urban slums) makes about 397millions of "rural poors" in this part of the world alone.
 
 Now, very rough rule-of-thumb: 6 per house (families aren't that big: infant mortality rate alone in Guinea narrows 10% without ebola) + 1 granary for 3 houses (things can be very different from place to place) :. 100 million houses. Amongst them, expect a fair amount of huts. 
 
 So as Pierre advises for all these: 
 building=yes and shift+O to draw circles. And happy shift-O-ing! But before, we need highways=tracks (and other roads), and landuse=residential.
 
 More generally, we have already debated the issue of remote mapping, and difficulty, sometimes, of getting the proper local context. 
 
 Our community is growing and most certainly including people in these areas who have more accurate knowledge of terrain, who know life "as it is" there. 
 We should rely more on them, and I welcome them to take some time explaining things that seem obvious to them, but are not to many westerners who take for granted all the wealth, goods, infrastructures... they benefit from.
 
 Sometimes however, language is an issue and it would be nice to see native/fluent english speakers make the others more self-confident, or risk themselves into other languages.
 
 It's a good thing we can share all this in this list. It is not a matter of "knowing" or "not knowing", nor is it of "just mapping", rather an opportunity to better know each other's cultures and realities. So I welcome more of these exchanges as they can serve improved mutual understanding. In-so-doing HOT and OSM can offer  us all far more than just maps (or data) : a better understanding of the world and people living on this planet, for a start...
 
 Best,
 
 Rod
 
 
 
 On 17/02/15 03:35, john whelan wrote:
  
  I strongly suspect they are huts that people live in.
 
  Cheerio John
   
 
 
  Hi Daniel,
 
 depends on what kind of "hut" you're talking about. Most of these are permanent housing. Some (they tend to be smaller) are granaries.
 Try googling images with "west african hut" and "millet granary" to make yourself an idea. 
 
 Rod
 
 
 
 On 16/02/15 20:09, Daniel Specht wrote:
  
 Oops -- didn't mean to send that last one.  Question about huts -- in West Africa there are a lot of huts, sometimes just out in the forest with no rectangular buildings or clearings nearby.  Are these for storage?  Temporary housing? 
  Dan
  
  
  
  Date: Sun, 15 Feb 2015 18:55:45 -0500
 From: john whelan <jwhelan0112 at gmail.com>
 To: "hot at openstreetmap.org" <hot at openstreetmap.org>
 Subject: [HOT] Validation
 Message-ID:
         <CAJ-Ex1F3+N6dHh62xnjNazs-p-Q8HLMLX77BVd_+ZU78SR51Hg at mail.gmail.com>
 Content-Type: text/plain; charset="utf-8"
 
 Mapping in Africa from satellite images I find I'm adding perhaps half a
 dozen settlements when I validate, they're quite quick and easy to do.
 Some are huts and are not quite so easy to spot.
 
 Question at what point should I invalidate?  The question arises when
 perhaps I've added a dozen settlements and half a dozen highways, I'm
 fairly experienced so fairly comfortable the work is OK after I've added in
 the validation but there is the question that I've added a dozen
 settlements and no one else will be validating.
 
 I'm looking more for pragmatic answers more than anything else, there is a
 concern that if I invalidate a tile it may demotivate a mapper and at the
 moment we have a lot of tiles to map.
 
 Thanks
 
 Cheerio John
 
  -- 
 Dan    
  
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https://lists.openstreetmap.org/listinfo/hot
 
 
 
 -- 
Rod Béra,  MCF Géomatique                /   Lecturer, Geomatics
           et SIG pour l'Environnement  /    and Environmental GIS
Agrocampus-Ouest|65 r.Saint-Brieuc|CS84215|35042 Rennes cedex|France
+33 (0) 223 48 5553 - roderic.bera at agrocampus-ouest.fr  
  
  _______________________________________________
HOT mailing list
HOT at openstreetmap.org
https://lists.openstreetmap.org/listinfo/hot
  
 
 
 On 16 February 2015 at 21:09, Daniel Specht <danspecht at gmail.com> wrote:
 
 An example of this is  
#892 - Ebola Outbreak, Guinea, Kindia Prefecture, Road network and settlements, task 77.  Lots of the residential areas have only these barely visible round things.
 
  
  Dan   
  ---------- Forwarded message ----------
 From: Daniel Specht <danspecht at gmail.com>
 Date: Mon, Feb 16, 2015 at 11:09 AM
 Subject: huts.
 To: HOT at openstreetmap.org
 
 
 Oops -- didn't mean to send that last one.  Question about huts -- in West Africa there are a lot of huts, sometimes just out in the forest with no rectangular buildings or clearings nearby.  Are these for storage?  Temporary housing? 
  Dan
  
  
  
  Date: Sun, 15 Feb 2015 18:55:45 -0500
 From: john whelan <jwhelan0112 at gmail.com>
 To: "hot at openstreetmap.org" <hot at openstreetmap.org>
 Subject: [HOT] Validation
 Message-ID:
         <CAJ-Ex1F3+N6dHh62xnjNazs-p-Q8HLMLX77BVd_+ZU78SR51Hg at mail.gmail.com>
 Content-Type: text/plain; charset="utf-8"
 
 Mapping in Africa from satellite images I find I'm adding perhaps half a
 dozen settlements when I validate, they're quite quick and easy to do.
 Some are huts and are not quite so easy to spot.
 
 Question at what point should I invalidate?  The question arises when
 perhaps I've added a dozen settlements and half a dozen highways, I'm
 fairly experienced so fairly comfortable the work is OK after I've added in
 the validation but there is the question that I've added a dozen
 settlements and no one else will be validating.
 
 I'm looking more for pragmatic answers more than anything else, there is a
 concern that if I invalidate a tile it may demotivate a mapper and at the
 moment we have a lot of tiles to map.
 
 Thanks
 
 Cheerio John
 
  -- 
 Dan     
 
 
    -- 
 Dan  
 _______________________________________________
 HOT mailing list
 HOT at openstreetmap.org
 https://lists.openstreetmap.org/listinfo/hot
 
 
  
  
  
 _______________________________________________
HOT mailing list
HOT at openstreetmap.org
https://lists.openstreetmap.org/listinfo/hot
 
 
 
 -- 
Rod Béra,  MCF Géomatique                /   Lecturer, Geomatics
           et SIG pour l'Environnement  /    and Environmental GIS
Agrocampus-Ouest|65 r.Saint-Brieuc|CS84215|35042 Rennes cedex|France
+33 (0) 223 48 5553 - roderic.bera at agrocampus-ouest.fr 
_______________________________________________
HOT mailing list
HOT at openstreetmap.org
https://lists.openstreetmap.org/listinfo/hot




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