[Openstreetmap-dev] curves

SteveC steve at asklater.com
Wed Jan 18 11:54:18 GMT 2006

* @ 18/01/06 09:29:44 AM tom at tom-carden.co.uk wrote:
> > My experience of street network data in GIS is that it doesn't usually use
> > curves at all. Everything is points and straight lines, or polylines, and
> > although it looks crude at very close zooms the data is always good
> > enough.
> >
> Interesting.  We can do better than that then :)
> > I wonder if curves are going to add to the complexity of the applet and
> > also data export, without really giving a lot of benefit in terms of
> > additional data. Wouldn't point and line data be more portable into other
> > formats in the future? Just a thought.
> >
> Right now, I agree.
> I don't think it's worth putting much effort into writing curve software
> right now. As you can see from the wiki page, it's going to be hard to
> settle on the ideal curve type - what's important for the editor (speed,
> ease of use) isn't important for print maps (quality, clarity) for
> example.  Also, editing curves is a bit of an art form, and adding it into
> the OSM editors might needlessly raise the bar for editing.
> Not to mention that other things are more pressing (selecting multiple
> segments for naming, and tagging streets as motorway/footpath/rail in the
> applet, to name my favourite two).  Adding curves would also needlessly
> raise the bar for writing clients.

I wasn't planning on curves soon... but now I've seen the mess (and the
patents !?) I'll delay further.

> I wouldn't sweat it over curves when refactoring the database - if
> necessary, the modifications can be made at a later date.

100.times do
  puts 'Nothing is functionally changing in the database.'


have fun,

SteveC steve at asklater.com http://www.asklater.com/steve/

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