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Add international airports at z8-9 (#1187)

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Closes #1082

This PR moves the aerodrome/aerodrome_type consolidation (via template) into the lower-level `osm_aerodrome_label_point` table, and creates a partial index on class `international` for airports with an `iata` code.  The presence of an `iata` code is more significant than an `icao` code which exists at many smaller, general aviation airport.  Therefore, `international` + `iata` should be a sufficient filter.

Zoom 8 international airports in the NYC area (blue dots):
![image](https://user-images.githubusercontent.com/3254090/130335311-10b7aa35-d2f9-42cc-a054-878048012040.png)

Zoom 10 in the same area:
![image](https://user-images.githubusercontent.com/3254090/130335327-3989cfba-80ca-46dd-a157-45b375f84a8d.png)
This commit is contained in:
Brian Sperlongano
2021-08-23 08:14:50 -04:00
committed by GitHub
parent aee838e29f
commit 7e9a6812d7
3 changed files with 35 additions and 4 deletions
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27
layers/aerodrome_label/aerodrome_label.sql
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@@ -19,6 +19,28 @@ CREATE OR REPLACE FUNCTION layer_aerodrome_label(bbox geometry,
)
AS
$$
SELECT
-- etldoc: osm_aerodrome_label_point -> layer_aerodrome_label:z8
-- etldoc: osm_aerodrome_label_point -> layer_aerodrome_label:z9
ABS(osm_id) AS id, -- mvt feature IDs can't be negative
geometry,
name,
COALESCE(NULLIF(name_en, ''), name) AS name_en,
COALESCE(NULLIF(name_de, ''), name, name_en) AS name_de,
tags,
aerodrome_type AS class,
NULLIF(iata, '') AS iata,
NULLIF(icao, '') AS icao,
substring(ele FROM E'^(-?\\d+)(\\D|$)')::int AS ele,
round(substring(ele FROM E'^(-?\\d+)(\\D|$)')::int * 3.2808399)::int AS ele_ft
FROM osm_aerodrome_label_point
WHERE geometry && bbox
AND aerodrome_type = 'international'
AND iata <> ''
AND zoom_level BETWEEN 8 AND 9
UNION ALL
SELECT
-- etldoc: osm_aerodrome_label_point -> layer_aerodrome_label:z10_
ABS(osm_id) AS id, -- mvt feature IDs can't be negative
@@ -27,10 +49,7 @@ SELECT
COALESCE(NULLIF(name_en, ''), name) AS name_en,
COALESCE(NULLIF(name_de, ''), name, name_en) AS name_de,
tags,
CASE
%%FIELD_MAPPING: class %%
ELSE 'other'
END AS class,
aerodrome_type AS class,
NULLIF(iata, '') AS iata,
NULLIF(icao, '') AS icao,
substring(ele FROM E'^(-?\\d+)(\\D|$)')::int AS ele,