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Fix transportation road segments disconnection (#1109)

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To avoid discontinuous transportation lines between zooms 9 and 11. 
 - Originally limit geometry by length for z9 - z11 (`ST_Length(geometry) > ZRes(11)`)
 - highway z9 to z11 was generalized during import-osm
 - now just create a filtered and generalized z11 table
 - then merge segments in the same way as from (full-featured) osm_highway_linestring and used this merged z11 for mat.view z10 and z9

Close #1107
This commit is contained in:
Tomas Pohanka
2021-04-30 15:39:56 +02:00
committed by GitHub
parent 68ec5c7ac8
commit d0ebdde458
5 changed files with 93 additions and 22 deletions
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15
layers/transportation/transportation.sql
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@@ -209,7 +209,7 @@ FROM (
WHERE zoom_level = 8
UNION ALL
-- etldoc: osm_highway_linestring_gen_z9 -> layer_transportation:z9
-- etldoc: osm_transportation_merge_linestring_gen_z9 -> layer_transportation:z9
SELECT osm_id,
geometry,
highway,
@@ -234,12 +234,11 @@ FROM (
mtb_scale,
NULL AS surface,
z_order
FROM osm_highway_linestring_gen_z9
FROM osm_transportation_merge_linestring_gen_z9
WHERE zoom_level = 9
AND ST_Length(geometry) > ZRes(11)
UNION ALL
-- etldoc: osm_highway_linestring_gen_z10 -> layer_transportation:z10
-- etldoc: osm_transportation_merge_linestring_gen_z10 -> layer_transportation:z10
SELECT osm_id,
geometry,
highway,
@@ -264,12 +263,11 @@ FROM (
mtb_scale,
NULL AS surface,
z_order
FROM osm_highway_linestring_gen_z10
FROM osm_transportation_merge_linestring_gen_z10
WHERE zoom_level = 10
AND ST_Length(geometry) > ZRes(11)
UNION ALL
-- etldoc: osm_highway_linestring_gen_z11 -> layer_transportation:z11
-- etldoc: osm_transportation_merge_linestring_gen_z11 -> layer_transportation:z11
SELECT osm_id,
geometry,
highway,
@@ -294,9 +292,8 @@ FROM (
mtb_scale,
NULL AS surface,
z_order
FROM osm_highway_linestring_gen_z11
FROM osm_transportation_merge_linestring_gen_z11
WHERE zoom_level = 11
AND ST_Length(geometry) > ZRes(12)
UNION ALL
-- etldoc: osm_highway_linestring -> layer_transportation:z12