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Render long-distance ferries at longer zooms (#1486)

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In some areas of the world, ship transportation is the main means of long-distance travel.  For example, in Alaska, the [Alaska Marine Highway System](https://dot.alaska.gov/amhs/route.shtml) is the principal means of transportation through the Alaska Panhandle and down the Aleutian island chain.  The AMHS carries the same importance that the Interstate Highway System has on land, and these ferry routes are exceptionally long distance.
This commit is contained in:
Brian Sperlongano
2023-03-15 11:55:47 -04:00
committed by GitHub
parent d8c367f42c
commit e5a5acfa99
5 changed files with 277 additions and 4 deletions
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42
layers/transportation/mapping.yaml
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@@ -31,6 +31,48 @@ generalized_tables:
sql_filter: ST_IsValid(geometry)
tolerance: ZRES13
# etldoc: osm_shipway_linestring_gen_z5 -> osm_shipway_linestring_gen_z4
shipway_linestring_gen_z4:
source: shipway_linestring_gen_z5
sql_filter: ST_Length(geometry)>2*ZRES0
tolerance: ZRES5
# etldoc: osm_shipway_linestring_gen_z6 -> osm_shipway_linestring_gen_z5
shipway_linestring_gen_z5:
source: shipway_linestring_gen_z6
sql_filter: ST_Length(geometry)>ZRES0
tolerance: ZRES6
# etldoc: osm_shipway_linestring_gen_z7 -> osm_shipway_linestring_gen_z6
shipway_linestring_gen_z6:
source: shipway_linestring_gen_z7
sql_filter: ST_Length(geometry)>ZRES1
tolerance: ZRES7
# etldoc: osm_shipway_linestring_gen_z8 -> osm_shipway_linestring_gen_z7
shipway_linestring_gen_z7:
source: shipway_linestring_gen_z8
sql_filter: ST_Length(geometry)>ZRES2
tolerance: ZRES8
# etldoc: osm_shipway_linestring_gen_z9 -> osm_shipway_linestring_gen_z8
shipway_linestring_gen_z8:
source: shipway_linestring_gen_z9
sql_filter: ST_Length(geometry)>ZRES3
tolerance: ZRES9
# etldoc: osm_shipway_linestring_gen_z10 -> osm_shipway_linestring_gen_z9
shipway_linestring_gen_z9:
source: shipway_linestring_gen_z10
sql_filter: ST_Length(geometry)>ZRES4
tolerance: ZRES10
# etldoc: osm_shipway_linestring_gen_z11 -> osm_shipway_linestring_gen_z10
shipway_linestring_gen_z10:
source: shipway_linestring_gen_z11
sql_filter: ST_Length(geometry)>ZRES5
tolerance: ZRES11
# etldoc: osm_shipway_linestring_gen_z12 -> osm_shipway_linestring_gen_z11
shipway_linestring_gen_z11:
source: shipway_linestring_gen_z12