b3d67ed5b3
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.
34 lines
1.9 KiB
YAML
34 lines
1.9 KiB
YAML
layer:
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id: "park"
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description: |
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The park layer contains parks from OpenStreetMap tagged with
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[`boundary=national_park`](http://wiki.openstreetmap.org/wiki/Tag:boundary%3Dnational_park),
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[`boundary=protected_area`](http://wiki.openstreetmap.org/wiki/Tag:boundary%3Dprotected_area),
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or [`leisure=nature_reserve`](http://wiki.openstreetmap.org/wiki/Tag:leisure%3Dnature_reserve).
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buffer_size: 4
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fields:
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class:
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description: |
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Use the **class** to differentiate between different parks.
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The class for `boundary=protected_area` parks is the lower-case of the
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[`protection_title`](http://wiki.openstreetmap.org/wiki/key:protection_title)
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value with blanks replaced by `_`.
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`national_park` is the class of `protection_title=National Park` and `boundary=national_park`.
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`nature_reserve` is the class of `protection_title=Nature Reserve` and `leisure=nature_reserve`.
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The class for other [`protection_title`](http://wiki.openstreetmap.org/wiki/key:protection_title)
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values is similarly assigned.
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The class for `boundary=aboriginal_lands` is `aboriginal_lands`.
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name: The OSM [`name`](http://wiki.openstreetmap.org/wiki/Key:name) value of the park (point features only).
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name_en: English name `name:en` if available, otherwise `name` (point features only).
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name_de: German name `name:de` if available, otherwise `name` or `name:en` (point features only).
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rank: Rank of the park within one tile, starting at 1 that is the most important park (point features only).
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datasource:
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geometry_field: geometry
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query: (SELECT geometry, class, name, name_en, name_de, {name_languages}, rank FROM layer_park(!bbox!, z(!scale_denominator!), !pixel_width!)) AS t
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schema:
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- ./update_park_polygon.sql
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- ./park.sql
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datasources:
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- type: imposm3
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mapping_file: ./mapping.yaml
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