[Talk-ca] new goodies on OSM --> Canvec artifacts

[Frank Steggink]

On 25-11-2011 16:04, Richard Weait wrote:
> Dear All,
>
> The London hack weekend starts in a few hours in London (yay!),
> England (oh.)  One of these days I'll organize a hack weekend in
> London, Ontario, just for laughs.
>
> Interesting things come out of these hack weekends and sometimes we
> see the results right away, like squashed bugs or new tools, and other
> times the changes are rolled out on a schedule.  The OSM API change
> from 0.5 to 0.6 was largely decided at a previous hack weekend, then
> rolled out as scheduled during server maintenance if I recall
> correctly.
>
> So, I'm looking forward to interesting things coming out of the hack
> weekend.  You might enjoy watching the dev irc channel if you want to
> follow some of the discussions going on at the hack weekend, but
> really, you have to be there to get the full benefit.
>
> Two new things have appeared on OSM.org in the last two days, before
> the hack weekend even started.
>
> Today, the layer selector (the blue + top right of the map) was
> changed.  The seldom-updated nonames layer was removed, and two new
> layers were added.  The Transport map shows public transportation
> infrastructure, and the Open MapQuest map is a general purpose map.
> We want more people to understand you can make special purpose maps
> from the same OSM data.
>
> Yesterday, a new version of Potlatch2 was provided on the site.
> You'll know that you are using the new version when you realize that
> you have been using the map zoom buttons on the top left, rather than
> their previous top right location.  I didn't even realize that it was
> a change when I first saw it.  :-)
>
> Best regards,
> Richard
>
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>
Hi Richard,

Due to the use of Natural Earth (?) as a base layer, certain artifacts 
from the Canvec import become more visible, especially at the lower (<= 
7) zoomlevels. See for example the coastline issues in Atlantic Canada: 
http://www.openstreetmap.org/?lat=45.31&lon=-63.13&zoom=7&layers=T . 
Perhaps unintentional, but this rendering can help us a lot cleaning up 
after certain imports. So, I hope this rendering won't be adjusted 
soon... :)

During the import I also strongly suspect that the Canvec data contains 
railroads which do no longer exist. For example, in Québec a part of 
them have been converted to cycleways. Perhaps someone with good 
knowledge about those cycleways can retag them.

Regards,

Frank