[OSM-dev] OSM-Carto style, ported to vector tiles!
chris_hormann at gmx.de
Mon Jul 25 10:40:06 UTC 2016
On Monday 25 July 2016, Rory McCann wrote:
> > That however would also mean you would need to remove all the
> > way_area > 0.01*!pixel_width!::real*!pixel_height!::real
> > filters from SQL for z14 - otherwise you get missing geometries at
> > the higher zooms (not a real lot - that limit is about one Mercator
> > square meter at z14 - but when this occurs it would be visible and
> > possibly surprising).
> Oops. I will fix that. Do you know of an example of where this
> filtering applies in the normal OSM tileserver? It's helpful to have
> something to compare to?
That filter is primarily for the lower zooms for performance reasons, in
particular z6-z9. You should be able to simply remove it for z14
without negative effects.
> Yes, you can't use SQL to filter different things after z14. You have
> to use CartoCSS filters. A z14 tile needs to have all the data a z19
> tile needs to render.
The problem is not really filtering - this would be simple using
additional attributes generated from SQL. The real difficulty is
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