51751b5b78
This PR adding OSM ID to the lakes OSM lakes are used from zoom 6 From zoom 0 to zoom 5 are used Natural Earth lakes. - There is a new joining mat. view (`match_osm_ne_id`) contains which Natural Earth ID should convert to OSM ID. This logic is used to keep a consistent ID between switching between NE (zooms 0 - 5) and OSM (zooms 6 - 12). For smaller areas (not the whole planet), where are not available OSM lakes, the NE lakes keep their NE ID. - There are also switch the final views to the mat. views - this should slightly increase performance (get rid of multipolygons). - FIX typo for zooms 0 - 3 (`lakes` instead of `lake`).
53 lines
2.3 KiB
YAML
53 lines
2.3 KiB
YAML
layer:
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id: "water"
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requires:
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tables:
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- osm_ocean_polygon
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description: |
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Water polygons representing oceans and lakes. Covered watered areas are excluded (`covered=yes`).
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On low zoom levels all water originates from Natural Earth. To get a more correct display of the south pole you should also
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style the covering ice shelves over the water.
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On higher zoom levels water polygons from [OpenStreetMapData](http://osmdata.openstreetmap.de/) are used.
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The polygons are split into many smaller polygons to improve rendering performance.
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This however can lead to less rendering options in clients since these boundaries show up. So you might not be
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able to use border styling for ocean water features.
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fields:
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id:
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description: |
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From zoom 6 are taken OSM IDs. Up to zoom 5 there are used Natural Earth lakes, where are propagated the OSM IDs insted of Natural Earth IDs.
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For smaller area then planet, NE lakes keep their Natural Earth IDs.
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class:
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description: |
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All water polygons from [OpenStreetMapData](http://osmdata.openstreetmap.de/) have the class `ocean`.
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Water bodies with the [`waterway=riverbank`](http://wiki.openstreetmap.org/wiki/Tag:waterway=riverbank)
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or [`water=river`](http://wiki.openstreetmap.org/wiki/Tag:water=river) tag are classified as river. Wet and dry docks
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tagged [`waterway=dock`](http://wiki.openstreetmap.org/wiki/Tag:waterway=dock) are classified as a `dock`.
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All other water bodies are classified as `lake`.
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values:
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dock:
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waterway: 'dock'
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river:
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water: 'river'
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waterway: 'riverbank'
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lake:
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ocean:
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intermittent:
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description: |
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Mark with `1` if it is an [intermittent](http://wiki.openstreetmap.org/wiki/Key:intermittent) water polygon.
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values: [0, 1]
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brunnel:
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description: |
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Identifies the type of crossing as either a bridge or a tunnel.
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values:
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- bridge
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- tunnel
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buffer_size: 4
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datasource:
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query: (SELECT id, geometry, class, intermittent, brunnel FROM layer_water(!bbox!, z(!scale_denominator!))) AS t
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schema:
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- ./update_water.sql
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- ./water.sql
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datasources:
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- type: imposm3
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mapping_file: ./mapping.yaml
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