d427d58e36
This PR is a bugfix for the `water` layer. * `waterway=stream`, `waterway=river`, `waterway=canal`, `waterway=ditch`, and `waterway=drain` are all linear features, not area features. Thus, these objects are being unnecessarily mapped into the `osm_water_polygon` polygon table, and this PR removes these unneeded mappings. * The combination `natural=water` + `water=river` is the most popular tagging for river areas. However, the current mapping causes rivers tagged in this way to be rendered in the vector tiles as a `lake`. This PR adds a check for the `water=river` tag and tags both variants of river areas as `class=river`. `natural=water` + `water=river` river mapping:  `waterway=riverbank` river mapping:  Lake mapping for a `natural=water` (with no other tagging): 
47 lines
2.0 KiB
YAML
47 lines
2.0 KiB
YAML
layer:
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id: "water"
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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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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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waterway: ''
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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 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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