Simplification of waterlines according to zoom level.

OpenHistoricalMap · Mar 25, 2024 · b354009 · b354009
1 parent da8824b
commit b354009
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Showing 2 changed files with 130 additions and 11 deletions.
diff --git a/images/tiler-server/config/config.template.toml b/images/tiler-server/config/config.template.toml
@@ -258,8 +258,32 @@ center = [-74.275329586789, -12.153492567373, 8.0]
 	# Water Lines
 	[[maps.layers]]
 	name = "water_lines"
-	provider_layer = "osm.water_lines_gen0"
+	provider_layer = "osm.water_lines_gen0_5-5"
+	min_zoom = 5
+	max_zoom = 5
+
+	[[maps.layers]]
+	name = "water_lines"
+	provider_layer = "osm.water_lines_gen0_6-6"
+	min_zoom = 6
+	max_zoom = 6
+
+	[[maps.layers]]
+	name = "water_lines"
+	provider_layer = "osm.water_lines_gen0_7-7"
+	min_zoom = 7
+	max_zoom = 7
+
+	[[maps.layers]]
+	name = "water_lines"
+	provider_layer = "osm.water_lines_gen0_8-8"
 	min_zoom = 8
+	max_zoom = 8
+
+	[[maps.layers]]
+	name = "water_lines"
+	provider_layer = "osm.water_lines_gen0_9-9"
+	min_zoom = 9
 	max_zoom = 9
 
 	[[maps.layers]]

diff --git a/images/tiler-server/config/providers/water_lines.toml b/images/tiler-server/config/providers/water_lines.toml
@@ -1,36 +1,82 @@
+# Simplification for geometries
+
 [[providers.layers]]
 geometry_fieldname = "geometry"
 geometry_type = "linestring"
-id_fieldname = "id"
-name = "water_lines"
+id_fieldname = "osm_id"
+name = "water_lines_gen0_5-5"
 sql = """
 SELECT 
-    ST_AsMVTGeom(geometry, !BBOX!) AS geometry, 
-    id, 
-    osm_id, 
+    ST_AsMVTGeom(ST_Simplify(geometry, 2000), !BBOX!) AS geometry, 
+    ABS(osm_id) AS osm_id, 
     name, 
     type, 
     tags->'bridge' AS bridge, 
-    tags->'surface' AS surface, 
     tags->'start_date' AS start_date, 
     tags->'end_date' AS end_date, 
     isodatetodecimaldate(pad_date(tags->'start_date', 'start'), FALSE) AS start_decdate, 
     isodatetodecimaldate(pad_date(tags->'end_date', 'end'), FALSE) AS end_decdate 
 FROM 
-    osm_water_lines 
+    osm_water_lines_gen0 
 WHERE 
-    type IN ('river', 'canal', 'stream', 'ditch', 'drain', 'dam', 'cliff') 
+    type IN ('river', 'canal') 
     AND geometry && !BBOX!
 """
 
 [[providers.layers]]
 geometry_fieldname = "geometry"
 geometry_type = "linestring"
 id_fieldname = "osm_id"
-name = "water_lines_gen0"
+name = "water_lines_gen0_6-6"
 sql = """
 SELECT 
-    ST_AsMVTGeom(geometry, !BBOX!) AS geometry, 
+    ST_AsMVTGeom(ST_Simplify(geometry, 1500), !BBOX!) AS geometry, 
+    ABS(osm_id) AS osm_id, 
+    name, 
+    type, 
+    tags->'bridge' AS bridge, 
+    tags->'start_date' AS start_date, 
+    tags->'end_date' AS end_date, 
+    isodatetodecimaldate(pad_date(tags->'start_date', 'start'), FALSE) AS start_decdate, 
+    isodatetodecimaldate(pad_date(tags->'end_date', 'end'), FALSE) AS end_decdate 
+FROM 
+    osm_water_lines_gen0 
+WHERE 
+    type IN ('river', 'canal') 
+    AND geometry && !BBOX!
+"""
+
+[[providers.layers]]
+geometry_fieldname = "geometry"
+geometry_type = "linestring"
+id_fieldname = "osm_id"
+name = "water_lines_gen0_7-7"
+sql = """
+SELECT 
+    ST_AsMVTGeom(ST_Simplify(geometry, 1000), !BBOX!) AS geometry, 
+    ABS(osm_id) AS osm_id, 
+    name, 
+    type, 
+    tags->'bridge' AS bridge, 
+    tags->'start_date' AS start_date, 
+    tags->'end_date' AS end_date, 
+    isodatetodecimaldate(pad_date(tags->'start_date', 'start'), FALSE) AS start_decdate, 
+    isodatetodecimaldate(pad_date(tags->'end_date', 'end'), FALSE) AS end_decdate 
+FROM 
+    osm_water_lines_gen0 
+WHERE 
+    type IN ('river', 'canal') 
+    AND geometry && !BBOX!
+"""
+
+[[providers.layers]]
+geometry_fieldname = "geometry"
+geometry_type = "linestring"
+id_fieldname = "osm_id"
+name = "water_lines_gen0_8-8"
+sql = """
+SELECT 
+    ST_AsMVTGeom(ST_Simplify(geometry, 500), !BBOX!) AS geometry, 
     ABS(osm_id) AS osm_id, 
     name, 
     type, 
@@ -46,6 +92,30 @@ WHERE
     AND geometry && !BBOX!
 """
 
+[[providers.layers]]
+geometry_fieldname = "geometry"
+geometry_type = "linestring"
+id_fieldname = "osm_id"
+name = "water_lines_gen0_9-9"
+sql = """
+SELECT 
+    ST_AsMVTGeom(ST_Simplify(geometry, 100), !BBOX!) AS geometry, 
+    ABS(osm_id) AS osm_id, 
+    name, 
+    type, 
+    tags->'bridge' AS bridge, 
+    tags->'start_date' AS start_date, 
+    tags->'end_date' AS end_date, 
+    isodatetodecimaldate(pad_date(tags->'start_date', 'start'), FALSE) AS start_decdate, 
+    isodatetodecimaldate(pad_date(tags->'end_date', 'end'), FALSE) AS end_decdate 
+FROM 
+    osm_water_lines_gen0 
+WHERE 
+    type IN ('river', 'canal') 
+    AND geometry && !BBOX!
+"""
+
+
 [[providers.layers]]
 geometry_fieldname = "geometry"
 geometry_type = "linestring"
@@ -69,3 +139,28 @@ WHERE
     type IN ('river', 'canal', 'stream', 'ditch', 'drain', 'dam', 'cliff') 
     AND geometry && !BBOX!
 """
+
+[[providers.layers]]
+geometry_fieldname = "geometry"
+geometry_type = "linestring"
+id_fieldname = "id"
+name = "water_lines"
+sql = """
+SELECT 
+    ST_AsMVTGeom(geometry, !BBOX!) AS geometry, 
+    id, 
+    osm_id, 
+    name, 
+    type, 
+    tags->'bridge' AS bridge, 
+    tags->'surface' AS surface, 
+    tags->'start_date' AS start_date, 
+    tags->'end_date' AS end_date, 
+    isodatetodecimaldate(pad_date(tags->'start_date', 'start'), FALSE) AS start_decdate, 
+    isodatetodecimaldate(pad_date(tags->'end_date', 'end'), FALSE) AS end_decdate 
+FROM 
+    osm_water_lines 
+WHERE 
+    type IN ('river', 'canal', 'stream', 'ditch', 'drain', 'dam', 'cliff') 
+    AND geometry && !BBOX!
+"""