Quick script to convert an unnested json file with points to a valid geojson file

json2geojson.py

#!/usr/bin/env python
import json
import argparse

def parse_json(f):
    geojson = {}
    features = []
    geojson['type'] = 'FeatureCollection'
    j = json.load(open(f))
    geo_keys = {}
    lat_key = None
    lng_key = None
    geo_keys['lat'] = 'lat latitude Latitude LATITUDE LAT Lat'.split(" ")
    geo_keys['lng'] = 'lon long lng longitude Lon LON Long LONG Lng LNG Longitude LONGITUDE'.split(" ")
    for obj in j:
        feature = {}
        properties = {}
        feature['type'] = 'Feature'
        for k,v in obj.items():
            if k in geo_keys['lat']:
                lat_key = k
            if k in geo_keys['lng']:
                lng_key = k
            properties[k] = v
        feature['properties'] = properties            
        feature['geometry'] = {
            'type':'Point',
            'coordinates':[ obj[lng_key], obj[lat_key] ]
        }
        features.append(feature)
    geojson['features'] = features
    return geojson


if __name__ == "__main__":
    parser = argparse.ArgumentParser(description='Convert (unnested) JSON file to geojson')
    parser.add_argument('--infile', dest='infile')
    parser.add_argument('--outfile', dest='outfile')
    args = parser.parse_args()
    res = parse_json(args.infile)
    with open(args.outfile, 'w') as fp:
        fp.write(json.dumps(res, indent=4))