colouring-montreal/etl/load_coordinates.sh
2022-04-14 09:28:34 +01:00

38 lines
1.3 KiB
Bash

#!/usr/bin/env bash
# Assign latitute and longitute to buildings with OpenTOID data
# - assume postgres connection details are set in the environment using PGUSER, PGHOST etc.
: ${1?"Usage: $0 ./path/to/opentoid/dir"}
opentoid_dir=$1
echo "Create a temporary table for coordinates..."
psql -c "CREATE TABLE open_toid (
toid varchar,
version_number smallint,
version_date date,
source_product varchar,
easting float,
northing float,
latitute float,
longitude float
);"
echo "Loading Open TOID CSV(s) to temporary table..."
find $opentoid_dir -type f -name '*.csv' \
-printf "$opentoid_dir/%f\n" | \
parallel \
cat {} '|' psql -c "\"COPY open_toid ( toid, version_number, version_date, source_product, easting, northing ) FROM stdin WITH CSV HEADER;\""
# Convert the northing/easting coordinates to latitude/longitute with PostGIS
psql -c "select AddGeometryColumn( 'public', 'open_toid', 'the_geom', 27700, 'POINT', 2);"
psql -c "update open_toid set the_geom=GeomFromText('POINT('||easting||' '||northing||')',27700);"
psql -c "update open_toid set longitude=st_x(st_transform(the_geom,4326)), latitude=st_y(st_transform(the_geom,4326));"
# Update the buildings table with coordinates
# psql -c ""
# Delete the temporary table
# psql -c "DROP TABLE open_toid;"