[HOT] unknown structures are buildings?

Blake Girardot bgirardot at gmail.com
Tue Nov 4 21:39:25 UTC 2014

Hi Ray,

I think the only reason my mapping tips page hasn't made it anywhere 
else is because I haven't finished it yet and I was sort of waiting 
until it got done and was given a final once over by everyone to make 
sure I am not pointing out anything incorrectly before sharing it widely 
as a resource. I have most of the data for the remaining sections so the 
rest should go pretty quickly.

I have been spending most of my time on validating and trying to help 
with a data import which is almost done and then I can finish up the 
tips page(s) and get them somewhere easier to find.


On 11/4/2014 4:27 PM, Ray Kiddy wrote:
> On Tue, 04 Nov 2014 20:59:57 +0000
> Michel Gilbert<michcasa at gmail.com>  wrote:
>> Hi Ian,
>> I found this page:
>> http://wiki.openstreetmap.org/wiki/User:Bgirardot/West_African_HOT_Mapping_Tips
>> that is created by BGirardot that provides good tips helping to
>> understand the context for mapping West Africa in terms of features.
>> As an uninitiated HOT mappers I would need more of these.
>> Michel
> It seems an obvious suggestion that a link to the page above could
> appear on the page which some of the Instructions are linking to:
> https://wiki.openstreetmap.org/wiki/2014_West_Africa_Ebola_Response
> Obviously BGirardot's brain is not automatically hooked to all the wiki
> pages it should be hooked up with, more's the pity. :-)
> And this whole discussion could tie into the thread on the list:
>    "Video that Best Represents Our Work?"
> This thread seems to end up discussing ways to use video to help teach
> mappers how to do better mapping.
> This may be a good time for a straw-man catalog/training tool to appear
> on the wiki.
> - ray
>> On Tue Nov 04 2014 at 1:27:33 PM<thatwoodb at hushmail.com>  wrote:
>>> I agree wholeheartedly with Ray. It would be very helpful to have a
>>> page of examples of W. Africa satellite imagery showing, 1)
>>> buildings that are often overlooked by mappers, especially the less
>>> experienced ones, because they may not look like buildings to the
>>> uninitiated, and; 2) things that are often mistaken for buildings,
>>> but aren't. This catalog could be even more useful if further
>>> broken down by areas/countries whose structures differ somewhat, as
>>> well as by typical rural vs urban structures.
>>> If s/he has neither visited these countries nor studied their
>>> cultures, a mapper's working at a distinct disadvantage without
>>> such examples. I've spent some time looking at photos online of
>>> traditional buildings in this part of the world to try to improve
>>> my mapping, but these shots are taken from ground level, of course.
>>> And as Ray points out, it's a completely different experience when
>>> viewing them from a satellite's POV.
>>> -Ian
>>> On 11/4/2014 at 3:03 AM, "Ray Kiddy"<ray at ganymede.org>  wrote:
>>> On Tue, 4 Nov 2014 09:51:54 +0100
>>> Claire Halleux<claire.halleux at hotosm.org>  wrote:
>>>> Hi Ray,
>>>> For cassava, you could add something on the following page I
>>>> guess:
>>>> https://wiki.openstreetmap.org/w/index.php?title=Tag:crop%3Dcassava
>>>> If you intend to use a screenshot of imagery, make sure you keep
>>>> the copyright visible. We got permissions to do so from MapBox,
>>>> HIU and Bing, for training purposes.
>>>> Cheers
>>>> Claire
>>> I am not explaining myself well. The page you are pointing to has a
>>> picture of casava taken from the ground. This does not help me
>>> identify anything if I am looking at casava in a photo taken from a
>>> satellite.
>>> How does one recognize a mound of casava in Liberia? Or a yurt in
>>> Mongolia? Or a well in Pakinstan? From satellite imagery? Does a
>>> well in Pakistan look like well in Montana? Probably not. So, when
>>> one has no experience with an area of the world, how can one
>>> identify its structures? One way is to look at a bunch of satellite
>>> imagery and keep asking questions, over and over. Or, perhaps
>>> pictures of differently shaped structures can be pulled out which
>>> identifies different structures and describes where they appear.
>>> Like a catalog.
>>> So, is there some catalog of satellite imagery that will show what
>>> things look like in various places, for training purposes? Or would
>>> there be suggestions on how to create one and where it could be?
>>> thanx - ray
>>>> On Tue, Nov 4, 2014 at 2:58 AM, Ray Kiddy<ray at ganymede.org>
>>>> wrote:
>>>>> On Tue, 4 Nov 2014 09:16:50 +0800
>>>>> maning sambale<emmanuel.sambale at gmail.com>  wrote:
>>>>>> To me, it looks like building=construction (the dividing
>>>>>> walls are visible). Nearly the same as what I've seen on the
>>>>>> ground in Malawi, Africa.
>>>>>> If you're unsure, just tag it as building=yes.
>>>>> Is there a place on a wiki to place pictures that can be
>>>>> examined to learn to recognize some of the local structures? A
>>>>> catalog that shows how different things appear in different
>>>>> places?
>>>>> I have had similar questions. I had a pic and the round
>>>>> honeycomb looking things were identified as casava plants
>>>>> growing in bunches in Liberia. Is there a logical place on one
>>>>> of the wikis, a sort of image catalog, where I could add this
>>>>> pic and mark it with "Casava plant, Liberia, resolution of
>>>>> image = x"?
>>>>> I was editing in "#479 Tharparkar Drought, Sindh, Pakistan", and
>>>>> some of this stuff could have been on the moon. I just have no
>>>>> context to figure out the shapes of houses, what wells look like
>>>>> (just like houses?) and so on.
>>>>> A catalog of the structure types one might find in, for
>>>>> example, the deserts of Pakistan might be helpful.
>>>>> We could me mapping in Mongolia and I am also not going to know
>>>>> what a yurt looks like from above. Same thing.
>>>>> I went to the wiki and did a search, for example, on Pakistan
>>>>> and got back, as you might expect, the page on Pakistan. This
>>>>> page does not show me, however, how the different types of
>>>>> houses there may appear in imagery.
>>>>> I can, of course, start something, and will. I just wanted to
>>>>> see if there are suggestions from you all first.
>>>>> thanx - ray
>>>>>> On Tue, Nov 4, 2014 at 8:41 AM, Warren Roberts
>>>>>> <gisteacher at gmail.com>  wrote:
>>>>>>> Does anyone have an idea if these are walls for building
>>>>>>> (without roof) .. there are many and in Sierra Leone. Wanted
>>>>>>> to identify them ether to digitize them as buildings. Thanks
>>>>>>> [image: --]
>>>>>>> Warren Roberts
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