On Wed, Dec 19, 2012 at 3:29 PM, Toby Murray <[email protected]> wrote: > > I was doing some poking around yesterday and noticed that county > borders (admin_levl=6) aren't being rendered at zoom 9 and 10. But I > do recall some confusion on the existing style between ways and > relations. I don't remember the details but there was some difference > between the zoom level at which ways and relations tagged with > admin_level=6 got rendered. Maybe this caused confusion when porting > to carto? Easy place to see this difference: > http://bl.ocks.org/d/4271706/#9.00/39.4664/-96.9125 > <http://lists.openstreetmap.org/listinfo/dev> >
This seems to be about boundary relation way members being individually (and redundantly?) tagged with boundary=administrative. Some of the admin_level=6 ways in this area [1] are tagged as boundary=administrative, and others are tagless members of boundary relations. If you zoom out, the tagless ways disappear at zoom level 10 and below. [1]: http://osm.org/go/T7OwGz3-- This commented out section of the stylesheet may be why the CartoCSS version is different: https://github.com/gravitystorm/openstreetmap-carto/blob/master/admin.mss#L75-L85 -- AJ Ashton
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