Re: [Talk-ca] aerial imagery for missing roads

2016-06-22 Thread Stewart C. Russell 
Hi Martijn,

> I am wondering if you know of any more recent aerial imagery that may be
> available? Or other suggestions to fill in these missing roads? (We have
> found many, many cases in Canada alone)

We don't have a national mapping agency in Canada that gives everything
away for free. Aerial imagery is typically carried out every couple of
years by the provinces, but in agricultural areas only. This is not free
and tends to cost anything from $10-150 / sq km just to see. Coverage is
spotty, and depends on the province's priorities.

Within 10 miles of the Great Lakes (so, not in your example) we used to
have access to wonderful USGS imagery. We can no longer see it in
Canada, although I suspect the images are still collected and may be
geofenced. Can't have free data getting in the way of Provincial cost
recovery, can we?

cheers,
 Stewart


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Re: [Talk-ca] aerial imagery for missing roads

2016-06-22 Thread Martijn van Exel 
Merci Daniel!
I can read French …ehm.. okay but don’t know it well enough to write. So feel 
free to respond in French, and I will probably be able to make sense of it. 
Again my apologies!
Martijn

> On Jun 22, 2016, at 11:40 AM, Begin Daniel  wrote:
> 
> Traduction en français …
> Salut à tous,
>  
> Excusez le message en anglais seulement, mon français est trop pauvre pour 
> être capable d'écrire quelque chose de cohérent.
>  
> Mes collègues de Telenav ont identifié un groupe de routes manquantes au 
> Canada. Celles-ci sont affichées sous forme de tuiles sur le site Web 
> ImproveOSM[1] et dans le plug-in ImproveOSM de l'application JOSM.
>  
> Le défi avec ces routes est que nous ne disposons pas toujours des images 
> aériennes pour nous permettre de cartographier ces dernières. Voici un 
> exemple [2].
>  
> Vous pouvez voir qu'il y a des travaux en cours, mais l'imagerie est trop 
> vieille pour nous montrer où les routes sont.
>  
> Je me demande si vous connaissez des images aériennes plus récentes qui 
> peuvent être disponibles? Ou d'autres suggestions pour remplir ces routes 
> manquantes? (Nous avons trouvé beaucoup, beaucoup de cas au Canada seulement)
>  
> Merci,
> Martijn
>  
>  
> From: Martijn van Exel [mailto:m...@rtijn.org] 
> Sent: June-22-16 12:06
> To: Talk-CA OpenStreetMap
> Subject: [Talk-ca] aerial imagery for missing roads
>  
> Hi all, 
>  
> Excuse my English only, my French is too poor to be able to write something 
> coherent. 
>  
> My colleagues at Telenav have identified a bunch of missing roads in Canada. 
> These are displayed as tiles on the improve-osm web site [1] and in the 
> ImproveOSM JOSM plugin.
>  
> The challenge with these is that we do not always have the aerial imagery to 
> allow us to map these. Here is an example [2].
>  
> You can see that there is construction going on but the imagery is too old to 
> show us where the roads are.
>  
> I am wondering if you know of any more recent aerial imagery that may be 
> available? Or other suggestions to fill in these missing roads? (We have 
> found many, many cases in Canada alone)
>  
> Thanks,
> Martijn
>  
> [1] See for example: 
> http://www.improve-osm.org/#48.3864397,-71.3031900,17/layer=OSM/OPEN/false,1-0-0/true,1-0-0-0-0/false,1-0
>  
> 
> [2] 
> https://www.dropbox.com/s/0bt0yrc1ppmhdhj/Screenshot%202016-06-22%2009.10.21.png?dl=0
>  
> 
>  - this location in OSM: 
> https://www.openstreetmap.org/#map=17/52.29692/-114.08170 
> 
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[Talk-ca] aerial imagery for missing roads

2016-06-22 Thread Martijn van Exel 
Hi all, 

Excuse my English only, my French is too poor to be able to write something 
coherent. 

My colleagues at Telenav have identified a bunch of missing roads in Canada. 
These are displayed as tiles on the improve-osm web site [1] and in the 
ImproveOSM JOSM plugin.

The challenge with these is that we do not always have the aerial imagery to 
allow us to map these. Here is an example [2].

You can see that there is construction going on but the imagery is too old to 
show us where the roads are.

I am wondering if you know of any more recent aerial imagery that may be 
available? Or other suggestions to fill in these missing roads? (We have found 
many, many cases in Canada alone)

Thanks,
Martijn

[1] See for example: 
http://www.improve-osm.org/#48.3864397,-71.3031900,17/layer=OSM/OPEN/false,1-0-0/true,1-0-0-0-0/false,1-0
 

[2] 
https://www.dropbox.com/s/0bt0yrc1ppmhdhj/Screenshot%202016-06-22%2009.10.21.png?dl=0
 - this location in OSM: 
https://www.openstreetmap.org/#map=17/52.29692/-114.08170 
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