72 lines
1.7 KiB
Python
72 lines
1.7 KiB
Python
|
"""Load OS MasterMap from GeoJSON to Postgres
|
||
|
|
|
||
|
|
Use `fid` as source_id
|
||
|
|
"""
|
||
|
|
import json
|
||
|
|
import glob
|
||
|
|
import os
|
||
|
|
import sys
|
||
|
|
|
||
|
|
import psycopg2
|
||
|
|
import shapely.geometry
|
||
|
|
|
||
|
|
|
||
|
|
def main(source_dir, config_path):
|
||
|
|
"""Load config, read files and save features to the database
|
||
|
|
"""
|
||
|
|
conf = read_config(config_path)
|
||
|
|
dbconf = conf['database']
|
||
|
|
conn = psycopg2.connect(**dbconf)
|
||
|
|
|
||
|
|
files = glob.glob(os.path.join(source_dir, '*.geojson'))
|
||
|
|
n = len(files)
|
||
|
|
|
||
|
|
for i, filename in enumerate(files):
|
||
|
|
print("Processing {} ({} of {})".format(filename, i+1, n))
|
||
|
|
with open(filename, 'r') as fh:
|
||
|
|
data = json.load(fh)
|
||
|
|
with conn.cursor() as cur:
|
||
|
|
for feature in data['features']:
|
||
|
|
save_feature(cur, feature)
|
||
|
|
conn.commit()
|
||
|
|
|
||
|
|
|
||
|
|
def save_feature(cur, feature):
|
||
|
|
"""Save a feature with geometry and source id
|
||
|
|
"""
|
||
|
|
cur.execute("""INSERT INTO geometries
|
||
|
|
(
|
||
|
|
geometry_doc,
|
||
|
|
geometry_geom
|
||
|
|
)
|
||
|
|
VALUES
|
||
|
|
(
|
||
|
|
%s,
|
||
|
|
ST_SetSRID(%s::geometry, %s)
|
||
|
|
)
|
||
|
|
""", (
|
||
|
|
json.dumps({
|
||
|
|
'source_id': feature['properties']['fid']
|
||
|
|
}),
|
||
|
|
shapely.geometry.shape(feature['geometry']).wkb_hex,
|
||
|
|
3857
|
||
|
|
)
|
||
|
|
)
|
||
|
|
|
||
|
|
|
||
|
|
def read_config(config_path):
|
||
|
|
"""Read a JSON config file containing database connection details
|
||
|
|
"""
|
||
|
|
with open(config_path, 'r') as fh:
|
||
|
|
conf = json.load(fh)
|
||
|
|
return conf
|
||
|
|
|
||
|
|
|
||
|
|
if __name__ == '__main__':
|
||
|
|
if len(sys.argv) != 3:
|
||
|
|
print("Usage: {} ./path/to/source/dir ./path/to/dbconfig.json".format(
|
||
|
|
os.path.basename(__file__)
|
||
|
|
))
|
||
|
|
exit()
|
||
|
|
main(sys.argv[1], sys.argv[2])
|