1614a4656c
Simplify some of the OSM->OMT field value mappings using declarative syntax. This approach is not for all cases, but in many it removes the need of storing the same field in both the .yaml and .sql files. TODO: support more complex AND/OR cases
61 lines
3.1 KiB
PL/PgSQL
61 lines
3.1 KiB
PL/PgSQL
CREATE OR REPLACE FUNCTION brunnel(is_bridge BOOL, is_tunnel BOOL, is_ford BOOL) RETURNS TEXT AS $$
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SELECT CASE
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WHEN is_bridge THEN 'bridge'
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WHEN is_tunnel THEN 'tunnel'
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WHEN is_ford THEN 'ford'
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ELSE NULL
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END;
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$$ LANGUAGE SQL IMMUTABLE STRICT;
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-- The classes for highways are derived from the classes used in ClearTables
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-- https://github.com/ClearTables/ClearTables/blob/master/transportation.lua
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CREATE OR REPLACE FUNCTION highway_class(highway TEXT, public_transport TEXT, construction TEXT) RETURNS TEXT AS $$
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SELECT CASE
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%%FIELD_MAPPING: class %%
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WHEN highway = 'construction' THEN CASE
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WHEN construction IN ('motorway', 'motorway_link') THEN 'motorway_construction'
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WHEN construction IN ('trunk', 'trunk_link') THEN 'trunk_construction'
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WHEN construction IN ('primary', 'primary_link') THEN 'primary_construction'
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WHEN construction IN ('secondary', 'secondary_link') THEN 'secondary_construction'
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WHEN construction IN ('tertiary', 'tertiary_link') THEN 'tertiary_construction'
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WHEN construction IN ('', 'unclassified', 'residential', 'living_street', 'road') THEN 'minor_construction'
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WHEN construction IN ('pedestrian', 'path', 'footway', 'cycleway', 'steps', 'bridleway', 'corridor')
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OR public_transport = 'platform' THEN 'path_construction'
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WHEN construction = 'service' THEN 'service_construction'
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WHEN construction = 'track' THEN 'track_construction'
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WHEN construction = 'raceway' THEN 'raceway_construction'
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ELSE NULL
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END
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ELSE NULL
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END;
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$$ LANGUAGE SQL IMMUTABLE;
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-- The classes for railways are derived from the classes used in ClearTables
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-- https://github.com/ClearTables/ClearTables/blob/master/transportation.lua
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CREATE OR REPLACE FUNCTION railway_class(railway TEXT) RETURNS TEXT AS $$
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SELECT CASE
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WHEN railway IN ('rail', 'narrow_gauge', 'preserved', 'funicular') THEN 'rail'
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WHEN railway IN ('subway', 'light_rail', 'monorail', 'tram') THEN 'transit'
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ELSE NULL
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END;
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$$ LANGUAGE SQL IMMUTABLE STRICT;
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-- Limit service to only the most important values to ensure
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-- we always know the values of service
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CREATE OR REPLACE FUNCTION service_value(service TEXT) RETURNS TEXT AS $$
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SELECT CASE
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WHEN service IN ('spur', 'yard', 'siding', 'crossover', 'driveway', 'alley', 'parking_aisle') THEN service
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ELSE NULL
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END;
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$$ LANGUAGE SQL IMMUTABLE STRICT;
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-- Limit surface to only the most important values to ensure
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-- we always know the values of surface
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CREATE OR REPLACE FUNCTION surface_value(surface TEXT) RETURNS TEXT AS $$
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SELECT CASE
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WHEN surface IN ('paved', 'asphalt', 'cobblestone', 'concrete', 'concrete:lanes', 'concrete:plates', 'metal', 'paving_stones', 'sett', 'unhewn_cobblestone', 'wood') THEN 'paved'
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WHEN surface IN ('unpaved', 'compacted', 'dirt', 'earth', 'fine_gravel', 'grass', 'grass_paver', 'gravel', 'gravel_turf', 'ground', 'ice', 'mud', 'pebblestone', 'salt', 'sand', 'snow', 'woodchips') THEN 'unpaved'
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ELSE NULL
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END;
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$$ LANGUAGE SQL IMMUTABLE STRICT;
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