41 lines
1.2 KiB
Bash
Executable File
41 lines
1.2 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Load geometries from GeoJSON to Postgres
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# - assume postgres connection details are set in the environment using PGUSER, PGHOST etc.
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: ${1?"Usage: $0 ./path/to/mastermap/dir"}
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mastermap_dir=$1
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# Create 'geometry' record with
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# id: <polygon-guid>,
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# source_id: <toid>,
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# geom: <geom>
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echo "Creating temporary geometries table for input data..."
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psql -c "CREATE TABLE IF NOT EXISTS release_geometries (
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geometry_id serial PRIMARY KEY,
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source_id varchar(30),
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geometry_geom geometry(GEOMETRY, 3857)
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);"
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echo "Copy geometries to db..."
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find $mastermap_dir -type f -name '*.3857.csv' \
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-printf "$mastermap_dir/%f\n" | \
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parallel \
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cat {} '|' psql -c "\"COPY release_geometries ( geometry_geom, source_id ) FROM stdin WITH CSV HEADER;\""
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# Copy release_geometries into existing geometries table
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psql -c "INSERT INTO geometries ( geometry_geom, source_id ) SELECT geometry_geom, source_id FROM release_geometries;"
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# Delete any duplicated geometries (by TOID)
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echo "Delete duplicate geometries..."
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psql -c "DELETE FROM geometries a USING (
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SELECT MIN(ctid) as ctid, source_id
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FROM geometries
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GROUP BY source_id
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HAVING COUNT(*) > 1
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) b
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WHERE a.source_id = b.source_id
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AND a.ctid <> b.ctid;"
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