[HOT] African Roads on Satelite
sanderd17 at gmail.com
Thu Jan 21 14:06:32 UTC 2016
The satellite images also differ a lot from region to region. In dry
regions, there are usually few trees, and you can easily see how wide a
road is. But in regions with lots of trees, the treetops often obscure part
of the road. So you might think from aerial imagery that it's only a
walking path, but in reality, there's a full-width road beneath the
So it's hard to make a difference, but you can estimate some things from
guessing what should be reachable by car.
2016-01-21 10:58 GMT+01:00 Paul Uithol <paul.uithol at hotosm.org>:
> Let me see if I can find a couple of good examples (combination of
> aerial/ground location) from the region where we're currently running a
> ground survey (eastern Uganda). Not seen anything like the motorway - the
> example looks pretty European.
> When in doubt, I usually tell our mappers to use `highway=unclassified` if
> it looks wide enough to allow regular traffic to pass (hopefully cars, at
> the very least motorbikes), and isn't a dead end.
> On 21-01-2016 12:46, Hakuch wrote:
> On 21.01.2016 02:38, Pierre Béland wrote:
> what this Highway Tag Africa wiki page says is that you classify a road related to its importance.
> yes I got this point from the Wiki. Its just, when you are doing HOT
> mapping, you normally have just a satellite image. So on the ground
> photos of streets are helpful to get an impression of the situation on
> the ground, but it might also be much more helpful to see examples of
> satellite images.
> I know, the classification does not only depend from the road condition
> that I will see on the image. But it could help for some situations. The
> Link to the Bing Satellite picture was very helpful for example.
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