[OSM-talk] Converting buildings from nodes to ways

2010-12-23 Thread Laurence Penney
I've been 'exploding' several building nodes into ways, based on splendid Bing imagery for Bristol. I'm getting concerned about data loss, the fact that any external database accumulating information on such vulnerable nodes, e.g. [1], will only with difficulty and guesswork be able to match it

Re: [OSM-talk] Converting buildings from nodes to ways

2010-12-23 Thread andrzej zaborowski
On 23 December 2010 13:10, Laurence Penney wrote: > I've been 'exploding' several building nodes into ways, based on splendid > Bing imagery for Bristol. I'm getting concerned about data loss, the fact > that any external database accumulating information on such vulnerable nodes, > e.g. [1], w

Re: [OSM-talk] Converting buildings from nodes to ways

2010-12-23 Thread Andrew Harvey
I was advised on the newbies list a while ago to make that initial node part of the new way. ie. you move the node to somewhere on the edge of the building, then start tracing from that node. This means the node isn't deleted and one can see where in the history this node was converted from a lone

Re: [OSM-talk] Converting buildings from nodes to ways

2010-12-23 Thread Ed Avis
Andrew Harvey gmail.com> writes: >I was advised on the newbies list a while ago to make that initial >node part of the new way. ie. you move the node to somewhere on the >edge of the building, then start tracing from that node. This means >the node isn't deleted and one can see where in the histo

Re: [OSM-talk] Converting buildings from nodes to ways

2010-12-23 Thread Steve Bennett
On Thu, Dec 23, 2010 at 11:10 PM, Laurence Penney wrote: > * Is there a tagging convention to record node->way conversion, i.e. what was > this way's predecessor_node? I think it would be worthwhile to use relations here, to also address the general issue of different representations of the same

Re: [OSM-talk] Converting buildings from nodes to ways

2010-12-23 Thread Alan Mintz
At 2010-12-23 04:10, Laurence Penney wrote: I've been 'exploding' several building nodes into ways, based on splendid Bing imagery for Bristol. It is nice, isn't it? I've been lucky enough to have 25/30cm imagery from USGS in most of my area, but this 6cm stuff is awesome. And cheers to the i

Re: [OSM-talk] Converting buildings from nodes to ways

2010-12-28 Thread Laurence Penney
Thanks for the comments, everybody. The reuse of the old node in the new way, though not of supreme elegance, seems a very nice hack and I'll use it from now on. - L ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinf

Re: [OSM-talk] Converting buildings from nodes to ways

2010-12-29 Thread Dave F.
On 23/12/2010 12:10, Laurence Penney wrote: I've been 'exploding' several building nodes into ways, City centres maps look so much better with polygon ways, don't they? To encourage this practice it would be useful if the R (replicate) key in Potlatch worked from nodes to ways. It could also

Re: [OSM-talk] Converting buildings from nodes to ways

2010-12-29 Thread andrzej zaborowski
On 29 December 2010 13:47, Dave F. wrote: > On 23/12/2010 12:10, Laurence Penney wrote: >> >> I've been 'exploding' several building nodes into ways, > > City centres maps look so much better with polygon ways, don't they? > > To encourage this practice it would be useful if the R (replicate) key

Re: [OSM-talk] Converting buildings from nodes to ways

2010-12-29 Thread Dave F.
On 29/12/2010 20:17, andrzej zaborowski wrote: Hi Dave, On 29 December 2010 21:04, Dave F. wrote: On 29/12/2010 17:30, andrzej zaborowski wrote: On 29 December 2010 13:47, Dave F.wrote: On 23/12/2010 12:10, Laurence Penney wrote: I've been 'exploding' several building nodes into ways,

Re: [OSM-talk] Converting buildings from nodes to ways

2010-12-29 Thread Dave F.
On 29/12/2010 21:13, Dave F. wrote: On 29/12/2010 20:17, andrzej zaborowski wrote: Hi Dave, On 29 December 2010 21:04, Dave F. wrote: On 29/12/2010 17:30, andrzej zaborowski wrote: On 29 December 2010 13:47, Dave F.wrote: On 23/12/2010 12:10, Laurence Penney wrote: I've been 'exploding

Re: [OSM-talk] Converting buildings from nodes to ways

2010-12-29 Thread andrzej zaborowski
On 29 December 2010 22:13, Dave F. wrote: > On 29/12/2010 20:17, andrzej zaborowski wrote: >> >> Hi Dave, >> >> On 29 December 2010 21:04, Dave F.  wrote: >>> >>> On 29/12/2010 17:30, andrzej zaborowski wrote: On 29 December 2010 13:47, Dave F.    wrote: > > On 23/12/2010 12:10,

Re: [OSM-talk] Converting buildings from nodes to ways

2010-12-29 Thread Anthony
On Wed, Dec 29, 2010 at 4:44 PM, andrzej zaborowski wrote: > Well, this still needs a change in the database schema and the API > because currently there's no such attribute that the editors could > use. If you're going to change the database schema, I vote for just making IDs unique across all o

Re: [OSM-talk] Converting buildings from nodes to ways

2010-12-29 Thread andrzej zaborowski
On 29 December 2010 23:12, Anthony wrote: > On Wed, Dec 29, 2010 at 4:44 PM, andrzej zaborowski wrote: >> Well, this still needs a change in the database schema and the API >> because currently there's no such attribute that the editors could >> use. > > If you're going to change the database sch