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Integrate ice into landcover

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This commit is contained in:
lukasmartinelli
2016-10-24 09:51:19 +02:00
parent 446544f5c8
commit 2fdfa8aad2
4 changed files with 26 additions and 39 deletions
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26
layers/landcover/landcover.sql
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@@ -1,3 +1,20 @@
CREATE OR REPLACE VIEW landcover_z0 AS (
SELECT NULL::int AS osm_id, geom AS geometry, 'glacier' AS landuse, NULL AS "natural", NULL AS wetland FROM ne_110m_glaciated_areas
);
CREATE OR REPLACE VIEW landcover_z2 AS (
SELECT NULL::int AS osm_id, geom AS geometry, 'glacier' AS landuse, NULL AS "natural", NULL AS wetland FROM ne_50m_glaciated_areas
UNION ALL
SELECT NULL::int AS osm_id, geom AS geometry, 'ice_shelf' AS landuse, NULL AS "natural", NULL AS wetland FROM ne_50m_antarctic_ice_shelves_polys
);
CREATE OR REPLACE VIEW landcover_z5 AS (
SELECT NULL::int AS osm_id, geom AS geometry, 'glacier' AS landuse, NULL AS "natural", NULL AS wetland FROM ne_10m_glaciated_areas
UNION ALL
SELECT NULL::int AS osm_id, geom AS geometry, 'ice_shelf' AS landuse, NULL AS "natural", NULL AS wetland FROM ne_10m_antarctic_ice_shelves_polys
);
CREATE OR REPLACE VIEW landcover_z8 AS (
SELECT osm_id, geometry, landuse, "natural", wetland FROM osm_landcover_polygon
WHERE ST_Area(geometry) > 15000000
@@ -32,6 +49,15 @@ CREATE OR REPLACE VIEW landcover_z14 AS (
CREATE OR REPLACE FUNCTION layer_landcover(bbox geometry, zoom_level int)
RETURNS TABLE(osm_id bigint, geom geometry, landuse text, "natural" text, wetland text) AS $$
SELECT osm_id, geometry, landuse, "natural", wetland FROM (
SELECT * FROM landcover_z0
WHERE zoom_level BETWEEN 0 AND 1 AND geometry && bbox
UNION ALL
SELECT * FROM landcover_z2
WHERE zoom_level BETWEEN 2 AND 4 AND geometry && bbox
UNION ALL
SELECT * FROM landcover_z5
WHERE zoom_level BETWEEN 5 AND 7 AND geometry && bbox
UNION ALL
SELECT osm_id, ST_Simplify(geometry, 300) AS geometry, landuse, "natural", wetland
FROM landcover_z8 WHERE zoom_level = 8 AND geometry && bbox
UNION ALL