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 geometry processing. -- Christoph Hormann http://www.imagico.de/ _______________________________________________ dev mailing list [email protected] https://lists.openstreetmap.org/listinfo/dev
