[Talk-ca] aerial imagery for missing roads

[Martijn van Exel]

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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