Re: [Talk-ca] Confusing CanVec import: Elliot Lake

2014-08-28 Thread Stewart C. Russell
On 14-08-28 01:44 AM, James Ewen wrote:
 
 OSM is a living entity that changes.

I know this, James. But an edit should change the map for the better.
There were trails along Horne Lake, trails with boardwalks and bridges
that I walked and mapped by hand. But that work's gone — foom! —
replaced with an imported Horne Lake, v1 with land use polygons that
aren't even clipped to the lakeshore.

 So have a bit of a look into what CanVec is … You'll find
 these artifacts all over.

I'd like to suggest that, if an import breaks a country into
Minecraft-like square blocks, you're doing it wrong.

Many of the import guidelines were broken here, too. Is the CanVec
import process described in the wiki moribund? If there had been some
discussion here about imports in the 041J locale, I'd have relished the
opportunity to help fuse imported and source=survey data.

 Large complicated polygons abound in the OSM database. They just need
 to be dealt with appropriately.

Import/Guidelines recommends simplifying shapes
http://wiki.openstreetmap.org/wiki/Import/Guidelines#Consider_simplifying,
and MapShaper — the suggested tool — uses a couple of appropriate
algorithms.

 Everyone's contributions are
 appreciated, but occasionally we bump into each other.

Yeah, but as a pedestrian, I stood no chance against CanvecImports'
steamroller.

cheers,
 Stewart



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Re: [Talk-ca] Confusing CanVec import: Elliot Lake

2014-08-28 Thread Daniel Begin
I give a big +1 to James' comments

-Original Message-
From: James Ewen [mailto:ve6...@gmail.com] 

... existing data usually stays. Obviously a mistake was made. We're all human.
... whichever source has the best resolution should be the one that stays, or 
perhaps a merge of the best data from both...
... OSM is a living entity that changes.
... you've found an area of concern, and Andrew is responding. You can't get 
much better than this.
... should we take your Horne Lake closed polygon and simplify it down to 20 
points? [...] who defines sensible?

... And of course, thank you to both of you for all the work you guys ave done 
in adding to the OSM database. Everyone's contributions are appreciated, but 
occasionally we bump into each other. This forum gives us the perfect place to 
say Oops, excuse me... sorry!



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Re: [Talk-ca] Confusing CanVec import: Elliot Lake

2014-08-28 Thread Andrew
Hello:
For what it's worth I've downloaded the changeset (# 20327545 ) around
Horner lake and there wasn't any trails there prior to my upload. I'll
continue to investigate.

Andrew
aka CanvecImports


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