Re: [OSM-talk] Overlapping Crossing ways

2008-05-31 Thread Mark Williams
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Richard Fairhurst wrote:
 Mark Williams wrote:
 
[snip]
 
 On a slightly related issue, I'll be interested to see how  
 changesets, and the easier ability to monitor an area, affect this.  
 0.6b went live on 15th January, 0.8a on 30th March, so these  
 duplicated ways have been around there for a while: I'm slightly  
 surprised that they hadn't been noticed before.
 

Mmm, me too, but I've been looking to the east more of late, so it took
'til I ran up Validator over an area I knew to be reasonable already to
spot; but actually the whole section of M25, A13, junction  river were
on twice plus, as I said, a couple of triplicates (!)
This part has been done since before I joined OSM, so it's not under
active editing (not by me, anyway!).
Where it had been quite neatly done, it was hard to spot; and the
tripled layer actually used the same nodes, so GOK Perhaps when
routing is in actual common use these things will be spotted sooner.

It would be possible to put in quite an exotic set of these, producing
some really amusing navigation directions from that perspective ;) -
I've had my Navteq system suggest the 7th exit from a 4-road roundabout
before, perhaps I now know why?

Anyhow, I'm only speculating as to causes; I have sent a couple of
(hopefully) polite  helpful postings to named individuals, but no
feedback has been forthcoming as yet.

Please don't take it as yet another dig at Potlatch - As I said, I think
it's more of a network issue and would affect any on-line editor.

Mark
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Re: [OSM-talk] Overlapping Crossing ways

2008-05-30 Thread Andy Allan
On Fri, May 30, 2008 at 9:13 AM, Richard Fairhurst [EMAIL PROTECTED] wrote:

 (Should I also just disable z11 on Potlatch altogether? Thoughts
 welcome: personally I don't use it, but then I don't use the Yahoo
 imagery either.)

I'm an urban mapper, so the higher the zoom the better. Especially
when clicking edit on any of my traces, which immediately tries
loading tens of square kilometres of south-west london, bringing the
app to a juddering halt.

At least erring on the side of over-zoom allows people to easily zoom
back out, where as starting at too low a zoom often makes the
experience a bit naff.

Cheers,
Andy

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[OSM-talk] Overlapping Crossing ways

2008-05-29 Thread Mark Williams




This is another Potlatch grumble - but it's not really Potlatch, it's
the internet.

I just found a whole lot (really, a lot) of overlapping ways with some
really old data (Potlatch alpha  before) buried under new versions
from Potlatch v0.6a  0.8 - for instance, the M25 Junction 30 had 3
(three!!) layers of roundabout in places. 2 hours has seen most of it
off... I wonder how much of other peoples' time I just deleted?

I can't imagine this was done knowingly; I suspect that the redraw was
sufficiently slow that it looked unmapped to a less experienced user,
and allowed time to re-draw the ways before it showed up.

Would it be possible to make it draw ways  nodes BEFORE the aerial
photography, so this can't happen is less likely? I
had assumed that having to move from the map to the editor would
prevent this, but I think folk are scrolling miles  never seeing
the rendered version. Maybe a slippy map under the photography? Or make
it impossible to add any nodes until it's completely finished loading?

I also had a good number of "High Road; Low Road" names to untangle,
and a river to unplait. I do hope it stays done this time :)

Mark




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Re: [OSM-talk] Overlapping Crossing ways

2008-05-29 Thread Robin Paulson
2008/5/30 Mark Williams [EMAIL PROTECTED]:
 This is another Potlatch grumble - but it's not really Potlatch, it's the
 internet.

 I just found a whole lot (really, a lot) of overlapping ways with some
 really old data (Potlatch alpha  before) buried under new versions from
 Potlatch v0.6a  0.8 - for instance, the M25 Junction 30 had 3 (three!!)
 layers of roundabout in places. 2 hours has seen most of it off... I wonder
 how much of other peoples' time I just deleted?

i had a similar problem near me recently. i had a lot of streets that
had been 'helpfully' drawn, without tags, in small, unjoined segments.
after i mapped the area in question, i merged all the relevant
segments and tagged them as appropriate (all in potlatch, approx.
version 0.9a i think).

i was looking at the rendering the next day, and realised that when
they'd been merged, a new long road had been created, but the original
short pieces had not been deleted - not at all what i had imagined
would happen, and surely not intentional. i guess this is what
happened here with your m25 problems

maybe we need an extra warning category in maplint, to indicate
duplicate ways  - i.e. using the same nodes and having the same tags?


 I can't imagine this was done knowingly; I suspect that the redraw was
 sufficiently slow that it looked unmapped to a less experienced user, and
 allowed time to re-draw the ways before it showed up.

 Would it be possible to make it draw ways  nodes BEFORE the aerial
 photography, so this can't happen is less likely? I had assumed that having
 to move from the map to the editor would prevent this, but I think folk are
 scrolling miles  never seeing the rendered version. Maybe a slippy map
 under the photography? Or make it impossible to add any nodes until it's
 completely finished loading?

 I also had a good number of High Road; Low Road names to untangle, and a
 river to unplait.  I do hope it stays done this time :)

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