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#!/usr/bin/env python3
import argparse
import json
import logging
import sys
import os
import urllib.request
try:
from lxml import etree
except ImportError:
import xml.etree.ElementTree as etree
TYPES = [k.split('=') for k in [
'sponsored=partner1',
'sponsored=partner2',
'sponsored=partner3',
'sponsored=partner4',
'sponsored=partner5',
'sponsored=partner6',
'sponsored=partner7',
'sponsored=partner8',
'sponsored=partner9',
'sponsored=partner10',
'sponsored=partner11',
'sponsored=partner12',
'sponsored=partner13',
'sponsored=partner14',
'sponsored=partner15',
'sponsored=partner16',
'sponsored=partner17',
'sponsored=partner18',
'sponsored=partner19',
'sponsored=partner20',
'event=fc2018_city',
'event=fc2018',
]]
OSM_CACHE = os.path.join(os.path.dirname(sys.argv[0]), 'osm_cache.json')
def query_osm(osm_type, osm_id):
if os.path.exists(OSM_CACHE):
with open(OSM_CACHE, 'r') as f:
cache = json.load(f)
else:
cache = {}
k = '{}{}'.format(osm_type, osm_id)
if k in cache:
coord = cache[k]
return (coord[1], coord[0])
OSM_API_SERVER = 'https://api.openstreetmap.org/api/0.6'
try:
r = urllib.request.urlopen('{}/{}/{}{}'.format(
OSM_API_SERVER, osm_type, osm_id, '/full' if osm_type != 'node' else ''))
except OSError as e:
logging.warn('Could not download %s %s: %s', osm_type, osm_id, e)
return None
xml = etree.parse(r)
nodes = {}
for nd in xml.findall('node'):
nodes[nd.get('id')] = (float(nd.get('lat')), float(nd.get('lon')))
ways = {}
for way in xml.findall('way'):
coord = [0, 0]
count = 0
for nd in way.findall('nd'):
count += 1
for i in range(len(coord)):
coord[i] += nodes[nd.get('ref')][i]
ways[way.get('id')] = [coord[0] / count, coord[1] / count]
coord = None
if osm_type == 'node':
coord = nodes[str(osm_id)]
elif osm_type == 'way':
coord = ways[str(osm_id)]
else:
for el in xml.findall(osm_type):
if el.get('id') == str(osm_id):
coord = [0, 0]
count = 0
for m in el.findall('member'):
if m.get('type') == 'node' and m.get('ref') in nodes:
count += 1
for i in range(len(coord)):
coord[i] += nodes[m.get('ref')][i]
elif m.get('type') == 'way' and m.get('ref') in ways:
count += 1
for i in range(len(coord)):
coord[i] += ways[m.get('ref')][i]
if count > 0:
coord = [coord[0] / count, coord[1] / count]
if coord is None:
return None
cache[k] = coord
with open(OSM_CACHE, 'w') as f:
json.dump(cache, f)
return (coord[1], coord[0])
def get_coord(tags):
lat = tags.pop('lat', None)
lon = tags.pop('lon', None)
if lat is None or lon is None:
return None
return [float(lon), float(lat)]
def get_type(tags):
global TYPES
for t in TYPES:
if tags.get(t[0]) == t[1]:
return t[min(len(t)-1, 2)]
return None
def make_feature(coord, ftype, tags):
global type_to_colour, COLOURS
colour = None
if ftype in type_to_colour:
colour = type_to_colour[ftype]
else:
if type_to_colour:
i = max(type_to_colour.values())
else:
i = -1
if i < len(COLOURS) - 1:
colour = i + 1
type_to_colour[ftype] = colour
if colour is not None:
tags['marker-color'] = COLOURS[colour]
return {
'type': 'Feature',
'geometry': {
'type': 'Point',
'coordinates': coord,
},
'properties': tags
}
def ok_to_print(options, ftype):
if ftype is not None and options.missing:
return False
if options.types:
t = [s.strip() for s in options.types.split(',')]
if ftype not in t:
return False
return True
parser = argparse.ArgumentParser(
description='This script converts a mixed_whatever.txt file to a geojson.')
parser.add_argument('txt', help='Path to mixed_nodes.txt or mixed_tags.txt.')
parser.add_argument('-d', '--duplicates', action='store_true',
help='If specified, geojson will contain data only for duplicate '
'elements in mixed_tags.txt.')
parser.add_argument('-t', '--types',
help='Comma-separated list of types to include.')
parser.add_argument('-m', '--missing', action='store_true',
help='Include only items with type missing from the built-in list.')
options = parser.parse_args()
logging.basicConfig(level=logging.INFO, format='%(message)s')
COLOURS = [
'#a6cee3',
'#1f78b4',
'#b2df8a',
'#33a02c',
'#fb9a99',
'#e31a1c',
'#fdbf6f',
'#ff7f00',
'#cab2d6',
'#6a3d9a',
'#ffff99',
'#b15928',
]
type_to_colour = {}
features = []
is_nodes = 'nodes' in options.txt
tags = {}
coord = None
seen = {}
line_no = 0
with open(options.txt, 'r') as f:
for line in f:
line_no += 1
if line.strip()[:1] == '#':
continue
if is_nodes:
if len(line.strip()) == 0 and tags:
coord = get_coord(tags)
if coord is None:
logging.warn('No coordinate for line %s, type %s', line_no, get_type(tags))
tags = {}
else:
kv = [s.strip() for s in line.split('=', 1)]
if len(kv) == 2 and len(kv[0]) > 0:
tags[kv[0]] = kv[1]
else:
parts = [s.strip() for s in line.split(',')]
if len(parts) >= 3 and parts[1].isdigit():
kv = [s.split('=', 1) for s in parts[2:]]
tags = {k[0].strip(): k[1].strip() for k in kv}
# Check for duplicates
if options.duplicates:
k = (parts[0], parts[1])
if k not in seen:
seen[k] = True
tags = {}
continue
# Got OSM object, query its coordinates
coord = query_osm(parts[0], parts[1])
if coord is None:
logging.warn('No coordinate for line %s, type %s', line_no, get_type(tags))
if coord:
ftype = get_type(tags)
if ok_to_print(options, ftype):
features.append(make_feature(coord, ftype, tags))
coord = None
tags = {}
if is_nodes and tags:
coord = get_coord(tags)
ftype = get_type(tags)
if coord and ok_to_print(options, ftype):
features.append(make_feature(coord, ftype, tags))
print(json.dumps({'type': 'FeatureCollection', 'features': features},
ensure_ascii=False, indent=1))
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