[HOT] unknown structures are buildings?

Blake Girardot bgirardot at gmail.com
Tue Nov 4 21:12:23 UTC 2014


Hi,

I will get those pages finished up in the next week or so.

 From the conversation here I see I need to add in something about the 
buildings with no roofs and maybe something about fences.

Any additional recommendations or feedback on the existing items is welcome.

Cheers,
Blake



On 11/4/2014 3:59 PM, Michel Gilbert 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
>
> On Tue Nov 04 2014 at 1:27:33 PM <thatwoodb at hushmail.com
> <mailto: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
>     <mailto:ray at ganymede.org>> wrote:
>
>         On Tue, 4 Nov 2014 09:51:54 +0100
>         Claire Halleux <claire.halleux at hotosm.org
>         <mailto: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
>         <mailto:ray at ganymede.org>> wrote:
>         >
>         >  > On Tue, 4 Nov 2014 09:16:50 +0800
>         >  > maning sambale <emmanuel.sambale at gmail.com
>         <mailto: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 <mailto: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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