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Add aboriginal lands (#1489)

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This PR adds support for `boundary=aboriginal_lands` by adding it to the `park` layer. While these lands are certainly not "parks", they have similar treatment from a technology perspective and can benefit from the existing processing chain established in that layer. I set all of these objects to `class=aboriginal_lands` in the tiles, including at the lowest zoom in order to separate it from the protected area merging implemented in #1160. In order to distinguish these from general parks, I expose the `class` attribute for these objects at z4 and also ensure that the z4 generalization is performed separately for protected areas versus aboriginal lands.

This unblocks #ZeLonewolf/openstreetmap-americana#105, which describes why having indigenous land boundaries is an important general feature on the map. This is also consistent with my suggested implementation in https://github.com/openmaptiles/openmaptiles/issues/1296#issuecomment-967749403.
This commit is contained in:
Brian Sperlongano
2023-04-04 07:20:41 -04:00
committed by GitHub
parent 6f2b39e657
commit b3d67ed5b3
5 changed files with 14 additions and 9 deletions
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13
layers/park/park.sql
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@@ -26,11 +26,12 @@ SELECT osm_id,
FROM (
SELECT osm_id,
geometry,
COALESCE(
LOWER(REPLACE(NULLIF(protection_title, ''), ' ', '_')),
NULLIF(boundary, ''),
NULLIF(leisure, '')
) AS class,
CASE WHEN boundary='aboriginal_lands' THEN 'aboriginal_lands'
ELSE COALESCE(
LOWER(REPLACE(NULLIF(protection_title, ''), ' ', '_')),
NULLIF(boundary, ''),
NULLIF(leisure, '')
) END AS class,
name,
name_en,
name_de,
@@ -45,7 +46,7 @@ FROM (
NULL AS name_de,
NULL AS tags,
NULL AS leisure,
NULL AS boundary,
CASE WHEN boundary='aboriginal_lands' THEN boundary END AS boundary,
NULL AS protection_title
FROM osm_park_polygon_dissolve_z4
WHERE zoom_level = 4