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 <[email protected]> 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" <[email protected]> wrote: > > On Tue, 4 Nov 2014 09:51:54 +0100 > Claire Halleux <[email protected]> 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 <[email protected]> wrote: > > > > > On Tue, 4 Nov 2014 09:16:50 +0800 > > > maning sambale <[email protected]> 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 > > > > <[email protected]> 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 > > > [email protected] > > > https://lists.openstreetmap.org/listinfo/hot > > > > > > _______________________________________________ > HOT mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/hot > > _______________________________________________ > HOT mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/hot >
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