Re: [OSM-talk] RFC: what are empty nodes and how should w e use them?

2010-08-16 Thread Maarten Deen
On Mon, 16 Aug 2010 08:19:42 +0200, Frederik Ramm frede...@remote.org
wrote:
 Hi,
 
 Jonas Stein wrote:
 In the IRC channel i was told, that there are users who paint
 empty nodes in the map to mark things like
 road is not mapped, but continues here
 
 I do this occasionally, and I'm sure I haven't made this up but got
 the practice from someone/somewhere else - when a way is drawn and you
 know it goes on but haven't mapped it, you put three dots, just as
 you do in written language:
 
 ---  . . .
 
 I'm not religious about it but I think it is pretty elegant because
 it does not require language to explain it - or at least that's what I
 thought until I heard from several people that they delete empty
 nodes on sight without further thought.

It's the first that I heard of this strategy and I'm not sure if I
would recognize it. I certainly haven't in the past.

It does raise a question: why not just map a way over it and tag it
with some FIXME? If I map a new area and make photo's and see that there
is a road somewhere that I didn't go, I map the road as far as I can see
it and.

 I mean - an empty node somewhere in the middle of town which has sat
 there for ages, ok, but if you saw something like the above, where the
 three nodes clearly hint at a way continuation - would you really
 remove them? I'd think that a bit careless.

I would at least tag the nodes with a FIXME. Personally I do make a
point of looking at the history of a stray node, but that is far from
failsafe.

Regards,
Maarten

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Re: [OSM-talk] RFC: what are empty nodes and how should w e use them?

2010-08-16 Thread Maarten Deen
On Mon, 16 Aug 2010 15:00:52 +0200, pdora...@mac.com (Pierre-Alain
Dorange) wrote:
 Jonas Stein n...@jonasstein.de wrote:
 
  Yes, but JOSM has a chunked upload mode where it uses multiple
  transactions for one upload.

 Can someone confirm, that josm first uploads an empty node
 and then the content?
 
 Can't confirm ; be it would be very strange to upload an empty node,
 then the tag associate... or an empty node then then way associated.
 But it coudl happen for ways...

I think there is some confusion. JOSM uploads nodes first and then
ways. That's just because you cannot create a way between two nodes that
have not yet been created.

But that automatically means that if you upload in multiple chunks and
something goes wrong after nodes have been uploaded, it can occur that
the nodes will be created but the ways not.
And since most nodes that belong to ways have no tags, you end up with
a bunch of untagged nodes.

I don't think anyone tries to suggest that JOSM first uploads an empty
node and then uploads it again with the tags associated with it.

Maarten

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