[Talk-ca] aerial imagery for missing roads

[Pierre Béland]

Hi Martijn,
There is Canadian provincial/federal government agreement to provide updated data on various structures including roads. Other then the Canvec, we have access to the Geobase road database. This is quite complete, including road names, but might miss very recent roads. See "Route Geobase" in the CA section of the Imagery providers. This complete very well imageries such as Bing and MapBox.
Going north outside of urban zones, there are many tracks for lumber areas. Hard to assess the accessibility of such roads for cars.
 
Pierre 


      De : Martijn van Exel <m at rtijn.org>
 À : Stewart C. Russell <scruss at gmail.com> 
Cc : talk-ca at openstreetmap.org
 Envoyé le : jeudi 23 juin 2016 14h00
 Objet : Re: [Talk-ca] aerial imagery for missing roads
   
Hi Stewart, all, 

>From talking to some Canadian (provincial and local) government agency folks at a conference recently I got the sense that the open data landscape is pretty different than here in the US (which is again very different from most places in Europe where I am from originally).

The aerial route seems tricky from what you’re telling me. Unless we get access to a more up to date commercial resource. I wonder what opportunities the more recent versions of Canvec / Canvec+ road layers offer to find and complete newer roads in OSM. Has there been much effort into looking at that? The OSM folks here at Telenav where I work have built a conflation engine that may help integrate newer data into OSM and we could try that out on a smaller area.

Martijn

> On Jun 22, 2016, at 6:29 PM, Stewart C. Russell <scruss at gmail.com> wrote:
> 
> 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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