[Talk-ca] broken forests in eastern Canada

James james2432 at gmail.com
Wed Aug 31 15:50:17 UTC 2016


We could add it as a subpage to:
http://wiki.openstreetmap.org/wiki/WikiProject_Canada seeing as it involves
all of Canada and list out why it's this way etc

On Wed, Aug 31, 2016 at 10:40 AM, Begin Daniel <jfd553 at hotmail.com> wrote:

> “Whats up with the forests in Canada?” A wiki page is a good idea!
>
>
>
> And while talking about forest in eastern Canada…
>
>
>
> It would be very helpful to have a plugin in JOSM that deals with Canvec
> water/wooded area integration in multipolygon.  I am not really a developer
> but since the merging operations are repeated over and over again over
> large areas... might it be possible to do something?
>
>
>
> On the same topic, it has been suggested to split wooded areas in smaller
> chunks by using features on the ground as outer limits (mostly roads,
> streams, rivers) and get rid of arbitrary rectangles from Canvec. Is it
> something we are aiming at?
>
>
>
> Daniel
>
>
>
> *From:* john whelan [mailto:jwhelan0112 at gmail.com]
> *Sent:* Wednesday, 31 August, 2016 07:00
> *To:* Sam Dyck
> *Cc:* Talk-CA OpenStreetMap
> *Subject:* Re: [Talk-ca] broken forests in eastern Canada
>
>
>
> > we need to have a "Whats up with the forests in Canada?" page on the
> wiki to explain our situation and how we've tried to deal with it
>
> Sounds like a plan.
>
> Cheerio John
>
>
>
> On 30 August 2016 at 22:41, Sam Dyck <samueldyck at gmail.com> wrote:
>
> After reading through the changeset discussion, I discovered that one of
> my imports in Northern Manitoba made Worst of OSM. (
> http://worstofosm.tumblr.com/post/22180046353/dear-
> openstreetmap-isnt-it-strange-how-the). As someone who spends a some time
> amount of time in some of relatively unpopulated areas of Canada and makes
> an effort to check the quality of Canvec data (which is usually pretty
> good), I do agree that it is impossible to do everything to the same level
> of quality that we would provide in Toronto or Timmins or even small
> prairie towns.
>
> One of the things that seems to bother Nakaner and the WoO people (if I
> may put words in their mouths) is that the boundaries are a bit funky in
> Canvec. Forests, lakes and wetlands spill into each other, and they are
> often out of alignment with the Bing imagery. In some ways this reflects a
> degree of natural ambiguity: if we look at the above Hudson's bay
> coastline, their is hourly variation in coastlines, and even the long term
> patterns change over time. The Manitoba-Nunavut boundary is more or less
> fixed by so we can't correct it, and a glance at satellite imagery shows
> that the vegetation tends to be spaced off of the shoreline.
>
> That being said sometimes there is some weird stuff happening in Canvec
> data that is out of sync with what is on the ground. These should be
> corrected when detected, but are rare enough that they shouldn't be a
> problem. I confess I haven't always been great in following the rules when
> doing imports (I think the last few years I've been fully in compliance),
> and have sometimes caused problems, people on this list have generally
> understanding. Perhaps we need to have a "Whats up with the forests in
> Canada?" page on the wiki to explain our situation and how we've tried to
> deal with it.
>
>
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-- 
外に遊びに行こう!
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