[HOT] unknown structures are buildings?

Tue Nov 4 11:20:14 UTC 2014

Hi Ray,

Sorry, I didn't explain much myself neither.
I meant that that page (crop=cassava) is still empty (apart from the
cassava picture from the ground) and I think it would be interesting to
have examples from sat imagery on how to recognize those crops from above.
Blake Girardot actually started to prepare something on that subject. You
can check it here and exchange with him on the subject too:
http://wiki.openstreetmap.org/wiki/User:Bgirardot/West_African_HOT_Mapping_Tips#Cassava_.28Manioc.29_Crops

There have been several suggestions to create a catalog of objects found on
sat imagery but it doesn't exist yet + there were still some legal points
to be checked I think + technical points to set it up.
Before this one get created, I think it's worth to store the information at
some place where it can be accessed by all (like in the OSM wiki for
instance).

Best,

Claire

Claire Halleux
Volunteer and Member of the Board
+243 99 256 9980 (Kinshasa, DRC)
Humanitarian OpenStreetMap Team

http://www.hotosm.org/
http://wiki.openstreetmap.org/wiki/2014_DRC_Ebola_Response

On Tue, Nov 4, 2014 at 12:02 PM, 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
> > >
> > > _______________________________________________
> > > 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
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/hot/attachments/20141104/c423c7f8/attachment.html>