[OSM-talk] RFC: what are empty nodes and how should we use them?
Pierre-Alain Dorange
pdorange at mac.com
Mon Aug 16 14:00:52 BST 2010
Jonas Stein <news at 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...
> If split uploads contain this emty ones at the moment lets summarise:
>
> There could be empty nodes during splitted uploads.
> So nobody should delete nodes that are younger then a given timespan.
The splitted upload has a very short life.
I notice that in my area at a moment a create lot to empty nodes (would
have been associated with a building) when i try to upload a big
changeset (but JOSM failed) so then i use the split upload function from
JOSM and never got the same problem.
>From those expériences, i could say that big upload with JOSM could lead
to dupplicate nodes and empty nodes ; split upload are safer.
> ps: uploads should not split within empty nodes,
> but thats no topic here for now.
It can't be done, there is circompstance that would lead to empty nodes
upload. Imagine a large way (more than 300 nodes). If JOSM upload with a
split parameter of 200, then it would split during the way+nodes upload
and if for any reason the upload stop there empty nodes have been
transmit to the server...
--
Pierre-Alain Dorange
More information about the talk
mailing list