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Selective rendering of tracks and paths at z12-13 (#1190)

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Closes #271

This PR adds track and path rendering at lower zooms than currently provided, and also achieves near-parity with openstreetmap-carto on track and path rendering. A previously-abandoned attempt, with significant discussion, was #1169.
This commit is contained in:
Brian Sperlongano
2021-11-18 11:35:34 -05:00
committed by GitHub
parent 7f531c1dbb
commit 75d8c80228
12 changed files with 207 additions and 95 deletions
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17
layers/transportation_name/transportation_name.sql
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@@ -110,8 +110,12 @@ FROM (
FROM osm_transportation_name_linestring
WHERE zoom_level = 12
AND LineLabel(zoom_level, COALESCE(name, ref), geometry)
AND (highway_class(highway, '', subclass) NOT IN ('minor', 'track', 'path') OR highway='shipway')
AND NOT highway_is_link(highway)
AND
CASE WHEN highway_class(highway, NULL::text, NULL::text) NOT IN ('path', 'minor') THEN TRUE
WHEN highway IN ('unclassified', 'residential', 'shipway') THEN TRUE
WHEN route_rank = 1 THEN TRUE END
UNION ALL
-- etldoc: osm_transportation_name_linestring -> layer_transportation_name:z13
@@ -133,7 +137,16 @@ FROM (
FROM osm_transportation_name_linestring
WHERE zoom_level = 13
AND LineLabel(zoom_level, COALESCE(name, ref), geometry)
AND (highway_class(highway, '', subclass) NOT IN ('track', 'path') OR highway='shipway')
AND
CASE WHEN highway <> 'path' THEN TRUE
WHEN highway = 'path' AND (
name <> ''
OR network IS NOT NULL
OR sac_scale <> ''
OR route_rank <= 2
) THEN TRUE
END
UNION ALL
-- etldoc: osm_transportation_name_linestring -> layer_transportation_name:z14_