[OSM-talk] Norton, the village in the sea?

[Etienne Cherdlu]

On 5/10/06, SteveC <steve at asklater.com> wrote:
> * @ 09/05/06 11:30:36 PM openstreetmap-L at gj0.net wrote:
> > Nick
> > See
> > http://wiki.openstreetmap.org/index.php?title=Image:Yarmouth.png&rcid=6220
> >
> > The label was placed deliberately, for rendering purposes,  so that it
> > didn't obscure the streets.  It would make sense for the node to
> > actually be in the place it is supposed to label.  Any ideas about a
> > better way of doing this?
>
> In a past life I did label placement and electrostatic-spring network
> layout algorithms.
>
> Put a spring with some spring constant between the labels and their
> actual unmoving nodes. Then make all the labels repulsive with some
> constant so that they move away from each other but cant stray from
> their nodes because of the spring. Iterate the simulation with friction
> and it tends to end up with nice label placement, after you play with
> the two constants.

Do you have an actual algorithm?

There is a way in the current Osmarender to specify an x and y offset
so that a caption is offset from the node it is on, but this applies
to all tags of a specific kind.  Maybe the x-offset and y-offset
should be specifiable as tags on each node - but this would be very
tedious....

> XSLT is turing complete right?
Yes, but doable is not the same as easily doable...


>
> have fun,
>
> SteveC steve at asklater.com http://www.asklater.com/steve/
>


--
Etienne