[Talk-ca] [Imports] Importing CanVec better?

[Matthew Buchanan]

I started adding CanVec tile 104B to OSM using JOSM. So far I've put in the
south/west quadrant.  There was absolutely nothing in that area at all
before. It is my first import of CanVec data so if someone has time to
check, that would be great.

#13460999 <http://www.openstreetmap.org/browse/changeset/13460999> October
11, 2012 23:58
mattropolis_bulk<http://www.openstreetmap.org/user/mattropolis_bulk/edits>

-- Matthew Buchanan
-- Kamloops, BC


On 15 October 2012 23:03, Paul Norman <penorman at mac.com> wrote:

> > From: Maury Markowitz [mailto:maury.markowitz at gmail.com]
> > Sent: Monday, October 15, 2012 1:28 PM
> > To: imports at openstreetmap.org
> > Subject: [Imports] Importing CanVec better?
> >
> > Newb here, so I hope this is the right place to ask. I also posted on
> > one of the wiki talk pages, but I didn't know if anyone goes there.
> >
> > I have noticed that vectors imported from the CanVec database are split
> > at grid boundaries. This means that large objects like roads or lakes
> > are split into multiple parts in OSM.
> >
> > I strongly suspect that there is a way to re-integrate these into single
> > objects, which would greatly improve things (case in point, the cottage
> > would no longer be on a three-part lake :-)
>
> There are five different types of ways that can be split a tile boundaries.
>
> 1. Unclosed ways, like roads. It doesn't matter if these are split, but the
> ends need to share nodes so that they're connected. Splitting a road
> doesn't
> change the meaning.
>
> 2. Small closed ways, like buildings. These need to be joined into one
> closed way.
>
> 3. Lakes. These should be joined together, either as a closed way or as a
> multipolygon.
>
> 4. Large forests. These do not need to be joined. In fact, they need to be
> split at some point to avoid having a multipolygon the size of BC.
>
> 5. Coastlines (and the coast of lakes like the great lakes). In principle
> these are the same as other unclosed ways, but these should only be
> imported
> with those very familiar with both the CanVec water model and OSM
> coastlines.
>
> > As this data is automatically imported, is this the right place to
> > discuss this?
>
> CanVec isn't automatically imported. If people aren't performing the basic
> checks at edges you can send them a note or ask someone else to.
>
>
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