Support lake labels

src/import-external/Dockerfile

@@ -1,12 +1,15 @@
-FROM mdillon/postgis:9.4
+FROM osm2vectortiles/postgis
+
 ENV IMPORT_DATA_DIR=/data/import \
-    NATURAL_EARTH_DB=/data/import/natural_earth_vector.sqlite
+    NATURAL_EARTH_DB=/data/import/natural_earth_vector.sqlite \
+    LAKELINES_GEOJSON=/data/import/lake_centerline.geojson
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
       wget \
       unzip \
       gdal-bin \
       sqlite3 \
+      ca-certificates \
     && rm -rf /var/lib/apt/lists/*
 
 RUN mkdir -p $IMPORT_DATA_DIR \
@@ -24,6 +27,8 @@ RUN wget --quiet http://naciscdn.org/naturalearth/packages/natural_earth_vector.
     && rm natural_earth_vector.sqlite.zip \
     && ./usr/src/app/clean-natural-earth.sh
 
+RUN wget --quiet -L -P "$IMPORT_DATA_DIR" https://github.com/lukasmartinelli/osm-lakelines/releases/download/v0.9/lake_centerline.geojson
+
 COPY . /usr/src/app
 WORKDIR /usr/src/app
 

src/import-external/import-labels.sh

@@ -33,4 +33,9 @@ function import_labels() {
     import_geojson "$COUNTRIES_GEOJSON" "custom_countries"
 }
 
+function import_lakelines() {
+    import_geojson "$LAKELINES_GEOJSON" "custom_lakeline"
+}
+
 import_labels
+import_lakelines

src/import-osm/water_point_table.sql

@@ -1,12 +1,26 @@
+CREATE OR REPLACE FUNCTION imposm_id_to_osm_id (imposm_id BIGINT, is_polygon BOOLEAN) RETURNS BIGINT AS $$
+BEGIN
+ RETURN CASE
+   WHEN                      (imposm_id >=     0 )                      THEN imposm_id
+   WHEN (NOT is_polygon) AND (imposm_id >= -1e17 ) AND (imposm_id < 0 ) THEN abs(imposm_id)
+   WHEN (    is_polygon) AND (imposm_id >= -1e17 ) AND (imposm_id < 0 ) THEN abs(imposm_id)
+   WHEN (NOT is_polygon) AND (imposm_id <  -1e17 )                    THEN imposm_id +1e17
+   WHEN (    is_polygon) AND (imposm_id <  -1e17 )                    THEN imposm_id +1e17
+   ELSE 0
+ END;
+END;
+$$ LANGUAGE plpgsql IMMUTABLE;
+
 DROP TABLE IF EXISTS osm_water_point CASCADE;
 CREATE TABLE osm_water_point AS
 SELECT id,
-       topoint(geometry) AS geometry,
+       COALESCE(ll.wkb_geometry, topoint(wp.geometry)) AS geometry,
        timestamp,
        name, name_fr, name_en, name_de,
        name_es, name_ru, name_zh,
        area
-FROM osm_water_polygon;
+FROM osm_water_polygon AS wp
+LEFT JOIN custom_lakeline ll ON imposm_id_to_osm_id(wp.id, true) = ll.osm_id;
 
 CREATE INDEX ON osm_water_point USING gist (geometry);
 CREATE INDEX ON osm_water_point