Administrative boundaries not being rendered for closed ways

[matthijsmelissen]

See here for an example:

http://www.openstreetmap.org/?lat=37.88179412484169&lon=-122.3072612285614&zoom=18

The way representing the boundary for the city of Albany, which is being rendered by Mapnik, has a small gap, while the adjacent city of Berkeley boundary is closed. When I close the gap, Albany's borders disappear from the map. It appears that non-closed ways and closed ways that are part of relations are being rendered, but closed ways without relations are not.

See https://trac.openstreetmap.org/ticket/4667.

[matkoniecz]

the same happens with man_made=embankment - see http://help.openstreetmap.org/questions/35020/how-should-i-map-this-artificial-hill/35023 and example at http://www.openstreetmap.org/#map=19/52.29455/5.08556

http://www.openstreetmap.org/way/235003112 is not displayed, http://www.openstreetmap.org/way/234838596 is (235003112 also was displayed before my change)

[mverwijmeren]

I do not think this is one bug. Look at the following three lines from openstreetmap-carto.style:

node,way admin_level text linear
node,way boundary text linear
node,way man_made text polygon

For the boundaries the question is: "Why don't closed boundary ways end up in the planet_osm_roads table?". So this is actually an OSM2PgSQL problem.

For the embankments it is obvious why (and correct that) they end up in two tables. It just needs a UNION query on line 587 of project.mml (cliffs layer) to fix this.

[kocio-pl]

Looks like it's working now.

[jeisenbe]

Should we stop rendering the border lines from unclosed ways (lines)?