[OSM-dev] Converting OSM Mapnik stylesheet to Cascadenik or Carto

[Josh Doe]

Thanks for all the info. It seems Cascadenik has been superseded by Carto,
at least that's my impression, as Cascadenik hasn't been touched since last
year, and Carto is inspired by Cascadenik but has seen more recent and
active development. It would be interesting to see a comparison between
Carto and MapCSS. However I'm not sure if OSMF would even be interested in
changing the main stylesheet over to one of these.
-Josh

On Wed, Jul 27, 2011 at 11:21 AM, Andy Allan <gravitystorm at gmail.com> wrote:

> On Wed, Jul 27, 2011 at 4:03 PM, Phil! Gold <phil_g at pobox.com> wrote:
> > * Josh Doe <josh at joshdoe.com> [2011-07-27 10:52 -0400]:
> >> I'm curious if anyone has ever attempted to convert the massive OSM
> Mapnik
> >> stylesheet to one of the CSS-like languages such as Cascadenik or Carto.
> >
> > I started trying to do a conversion to Cascadenik, but gave up on it
> because
> > Cascadenik was generating tons of unnecessary rules (basically, the
> cartesian
> > product of all my selectors) that slowed Mapnik down quite considerably.
> > Maybe it's possible, but it's certainly not for the faint of heart.
>
> There's a new feature in mapnik to handle this better which carto uses
> - a flag for mapnik to match only one rule per style. Saves all the
> "and not X and not (not X and Y)" that Cascadenik generated. I don't
> know how much it helps though, all my projects have either been XML or
> cascadenik, or carto, and I've never tried converting one to the other
> and comparing benchmarks.
>
> Cheers,
> Andy
>
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