decrease buffer

default value for buffer around vector tile is now 64 coordinate units
adapt sources definition to new default buffer

Author: henrythasler

src/sources.json

@@ -290,6 +290,7 @@
             },
             {
               "minzoom": 16,
+              "buffer": 256,
               "table": "import.roads",
               "keys": [
                 "osm_id as id",
@@ -365,6 +366,7 @@
           "variants": [
             {
               "minzoom": 14,
+              "buffer": 256,
               "sql": "select osm_id as id, ST_AsMvtGeom(geometry, !BBOX!) as geom, class, subclass, ST_Length(geometry)::integer as length, ST_IsClosed(geometry) as polygon from import.manmade_lines WHERE (geometry && !BBOX!) \n                  UNION ALL\n                  select osm_id as id, ST_AsMvtGeom(geometry, !BBOX!) as geom, class, subclass, ST_Perimeter(geometry)::integer as length, TRUE as polygon from import.manmade_polygons WHERE (geometry && !BBOX!) \n                  UNION ALL\n                  select osm_id as id, ST_AsMvtGeom(geometry, !BBOX!) as geom, class, subclass, 0 as length, FALSE as polygon from import.manmade_points WHERE (geometry && !BBOX!)\n                  "
             }
           ]

src/sources.toml

@@ -197,6 +197,7 @@
       table   = "import.roads_gen15"
     [[sources.layers.variants]]
       minzoom = 16
+      buffer  = 256
       table   = "import.roads"
       keys      = [
         "osm_id as id", 
@@ -246,6 +247,7 @@
     sql       = "select osm_id as id, ST_AsMvtGeom(geometry, !BBOX!) as geom, class, subclass, ST_Length(geometry)::integer as length, ST_IsClosed(geometry) as polygon from import.manmade_lines_gen13 WHERE (geometry && !BBOX!)"
     [[sources.layers.variants]]
       minzoom = 14
+      buffer  = 256
       sql       = """select osm_id as id, ST_AsMvtGeom(geometry, !BBOX!) as geom, class, subclass, ST_Length(geometry)::integer as length, ST_IsClosed(geometry) as polygon from import.manmade_lines WHERE (geometry && !BBOX!) 
                   UNION ALL
                   select osm_id as id, ST_AsMvtGeom(geometry, !BBOX!) as geom, class, subclass, ST_Perimeter(geometry)::integer as length, TRUE as polygon from import.manmade_polygons WHERE (geometry && !BBOX!) 

src/tileserver.ts

@@ -186,7 +186,7 @@ export class Tileserver {
         const srid: number = (resolved.srid !== undefined) ? resolved.srid : ((source.srid !== undefined) ? source.srid : 3857);
         const bbox: string = `ST_Transform(ST_MakeEnvelope(${wgs84BoundingBox.leftbottom.lng}, ${wgs84BoundingBox.leftbottom.lat}, 
             ${wgs84BoundingBox.righttop.lng}, ${wgs84BoundingBox.righttop.lat}, 4326), ${srid})`;
-        const buffer: number = (resolved.buffer !== undefined) ? resolved.buffer : ((source.buffer !== undefined) ? source.buffer : 256);
+        const buffer: number = (resolved.buffer !== undefined) ? resolved.buffer : ((source.buffer !== undefined) ? source.buffer : 64);
         const clip_geom: boolean = (resolved.clip_geom !== undefined) ? resolved.clip_geom : ((source.clip_geom !== undefined) ? source.clip_geom : true);
         const prefix: string = (resolved.prefix !== undefined) ? resolved.prefix : ((source.prefix !== undefined) ? source.prefix : "");
         const postfix: string = (resolved.postfix !== undefined) ? resolved.postfix : ((source.postfix !== undefined) ? source.postfix : "");