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split out more code

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This commit is contained in:
Edward Betts 2021-04-16 22:24:59 +02:00
parent cec535ee7e
commit dc24e3f7e7
8 changed files with 194 additions and 215 deletions
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95
geocode/__init__.py
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@ -1,61 +1,38 @@
import requests
import simplejson
wikidata_query_api_url = "https://query.wikidata.org/bigdata/namespace/wdq/sparql"
OVERPASS_URL = "https://lz4.overpass-api.de"
headers = {"User-Agent": "UK gecode/0.1 (edward@4angle.com)"}
class QueryError(Exception):
def __init__(self, query, r):
self.query = query
self.r = r
def wikidata_api_call(params):
return requests.get(
"https://www.wikidata.org/w/api.php",
params={"format": "json", "formatversion": 2, **params},
headers=headers,
).json()
def get_entity(qid):
json_data = wikidata_api_call({"action": "wbgetentities", "ids": qid})
try:
entity = list(json_data["entities"].values())[0]
except KeyError:
return
if "missing" not in entity:
return entity
def qid_to_commons_category(qid):
entity = get_entity(qid)
try:
commons_cat = entity["claims"]["P373"][0]["mainsnak"]["datavalue"]["value"]
except Exception:
commons_cat = None
return commons_cat
def wdqs(query):
r = requests.post(
wikidata_query_api_url, data={"query": query, "format": "json"}, headers=headers
)
try:
return r.json()
except simplejson.errors.JSONDecodeError:
raise QueryError(query, r)
def run_query(oql, error_on_rate_limit=True):
return requests.post(
OVERPASS_URL + "/api/interpreter", data=oql.encode("utf-8"), headers=headers
)
samples = [
(50.8326, -0.2689, "Adur"),
(52.4914, -0.69645, "Corby"),
(50.893, -4.265, "Newton St Petrock"),
(51.779, 0.128, "Harlow"),
(52.387, 0.294, "Ely"),
(50.9, -1.6, "Minstead"),
(52.43, -1.11, "South Kilworth"),
(53.117, -0.202, "Tattershall Thorpe"),
(53.351, -2.701, "Halton"),
(52.421, -0.651, "Warkton"),
(51.51, -1.547, "Lambourn"),
(52.62, -1.884, "Shenstone"),
(53.309, -1.539, "Sheffield"),
(53.322, 0.032, "Haugham"),
(51.05, -2.598, "Babcary"),
(51.158, -1.906, "Berwick St James"),
(51.867, -1.204, "Weston-on-the-Green"),
(51.034, -2.005, "Ebbesbourne Wake"),
(51.07, -0.718, "Fernhurst"),
(53.059, -0.144, "Wildmore"),
(51.473, 0.221, "Dartford"),
(51.059, 0.05, "Danehill"),
(52.253, -0.122, "Papworth Everard"),
(53.498, -0.415, "West Lindsey"),
(53.392, -0.022, "Brackenborough with Little Grimsby"),
(53.463, -0.027, "Fulstow"),
(52.766, 0.31, "Terrington St Clement"),
(53.1540, -1.8034, "Hartington Town Quarter"),
(51.8532, -0.8829, "Fleet Marston"),
(51.4785, -0.354, "London Borough of Hounslow"),
(51.9687, -0.0327, "Buckland, Hertfordshire"),
(51.0804, -2.3263, "Zeals"),
(55.7644, -4.1770, "East Kilbride"),
(51.4520, -2.6210, "Bristol"),
]

36
geocode/overpass.py Normal file
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@ -0,0 +1,36 @@
from flask import current_app
from . import headers
import os
import json
import requests
OVERPASS_URL = "https://lz4.overpass-api.de"
def run_query(oql):
return requests.post(
OVERPASS_URL + "/api/interpreter", data=oql.encode("utf-8"), headers=headers
)
def is_in_lat_lon(lat, lon):
oql = f"""
[out:json][timeout:25];
is_in({lat},{lon})->.a;
(way(pivot.a); rel(pivot.a););
out bb tags qt;"""
return run_query(oql)
def get_osm_elements(lat, lon):
filename = f"cache/{lat}_{lon}.json"
use_cache = current_app.config["USE_CACHE"]
if use_cache and os.path.exists(filename):
return json.load(open(filename))["elements"]
r = is_in_lat_lon(lat, lon)
if use_cache:
open(filename, "wb").write(r.content)
return r.json()["elements"]

51
geocode/wikidata.py Normal file
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@ -0,0 +1,51 @@
import requests
import simplejson
from . import headers
wikidata_query_api_url = "https://query.wikidata.org/bigdata/namespace/wdq/sparql"
class QueryError(Exception):
def __init__(self, query, r):
self.query = query
self.r = r
def api_call(params):
return requests.get(
"https://www.wikidata.org/w/api.php",
params={"format": "json", "formatversion": 2, **params},
headers=headers,
).json()
def get_entity(qid):
json_data = api_call({"action": "wbgetentities", "ids": qid})
try:
entity = list(json_data["entities"].values())[0]
except KeyError:
return
if "missing" not in entity:
return entity
def qid_to_commons_category(qid):
entity = get_entity(qid)
try:
commons_cat = entity["claims"]["P373"][0]["mainsnak"]["datavalue"]["value"]
except Exception:
commons_cat = None
return commons_cat
def wdqs(query):
r = requests.post(
wikidata_query_api_url, data={"query": query, "format": "json"}, headers=headers
)
try:
return r.json()["results"]["bindings"]
except simplejson.errors.JSONDecodeError:
raise QueryError(query, r)

178
lookup.py
View file

@ -2,8 +2,8 @@
from flask import Flask, render_template, request, jsonify, redirect, url_for
import geocode
import os
import json
import geocode.wikidata
import geocode.overpass
import urllib.parse
import random
import psycopg2
@ -12,53 +12,15 @@ from geopy.distance import distance
# select gid, code, name from scotland where st_contains(geom, ST_Transform(ST_SetSRID(ST_MakePoint(-4.177, 55.7644), 4326), 27700));
commons_cat_start = "https://commons.wikimedia.org/wiki/Category:"
use_cache = True
headers = {"User-Agent": "UK gecode/0.1 (edward@4angle.com)"}
wd_entity = "http://www.wikidata.org/entity/Q"
city_of_london_qid = "Q23311"
samples = [
(50.8326, -0.2689, "Adur"),
(52.4914, -0.69645, "Corby"),
(50.893, -4.265, "Newton St Petrock"),
(51.779, 0.128, "Harlow"),
(52.387, 0.294, "Ely"),
(50.9, -1.6, "Minstead"),
(52.43, -1.11, "South Kilworth"),
(53.117, -0.202, "Tattershall Thorpe"),
(53.351, -2.701, "Halton"),
(52.421, -0.651, "Warkton"),
(51.51, -1.547, "Lambourn"),
(52.62, -1.884, "Shenstone"),
(53.309, -1.539, "Sheffield"),
(53.322, 0.032, "Haugham"),
(51.05, -2.598, "Babcary"),
(51.158, -1.906, "Berwick St James"),
(51.867, -1.204, "Weston-on-the-Green"),
(51.034, -2.005, "Ebbesbourne Wake"),
(51.07, -0.718, "Fernhurst"),
(53.059, -0.144, "Wildmore"),
(51.473, 0.221, "Dartford"),
(51.059, 0.05, "Danehill"),
(52.253, -0.122, "Papworth Everard"),
(53.498, -0.415, "West Lindsey"),
(53.392, -0.022, "Brackenborough with Little Grimsby"),
(53.463, -0.027, "Fulstow"),
(52.766, 0.31, "Terrington St Clement"),
(53.1540, -1.8034, "Hartington Town Quarter"),
(51.8532, -0.8829, "Fleet Marston"),
(51.4785, -0.354, "London Borough of Hounslow"),
(51.9687, -0.0327, "Buckland, Hertfordshire"),
(51.0804, -2.3263, "Zeals"),
(55.7644, -4.1770, "East Kilbride"),
(51.4520, -2.6210, "Bristol"),
]
app = Flask(__name__)
app.debug = True
app.config.from_object("config.default")
def get_random_lat_lon():
@ -77,7 +39,7 @@ def get_random_lat_lon():
def random_location():
lat, lon = get_random_lat_lon()
elements = get_osm_elements(lat, lon)
elements = geocode.overpass.get_osm_elements(lat, lon)
result = do_lookup(elements, lat, lon)
return render_template(
@ -98,7 +60,7 @@ def wikidata_tag():
elements = []
result = build_dict(hit, lat, lon)
else:
elements = get_osm_elements(lat, lon)
elements = geocode.overpass.get_osm_elements(lat, lon)
result = do_lookup(elements, lat, lon)
return render_template(
@ -153,7 +115,7 @@ def build_dict(hit, lat, lon):
def do_lookup(elements, lat, lon):
try:
hit = osm_lookup(elements, lat, lon)
except geocode.QueryError as e:
except geocode.wkidata.QueryError as e:
return {
"query": e.query,
"error": e.r.text,
@ -164,9 +126,7 @@ def do_lookup(elements, lat, lon):
def get_scotland_code(lat, lon):
conn = psycopg2.connect(
dbname="geocode", user="geocode", password="ooK3ohgh", host="localhost"
)
conn = psycopg2.connect(**app.config["DB_PARAMS"])
cur = conn.cursor()
point = f"ST_Transform(ST_SetSRID(ST_MakePoint({lon}, {lat}), 4326), 27700)"
@ -191,31 +151,8 @@ def wdqs_geosearch_query(lat, lon):
if isinstance(lon, float):
lon = f"{lon:f}"
query_template = """
SELECT DISTINCT ?item ?distance ?itemLabel ?isa ?isaLabel ?commonsCat ?commonsSiteLink WHERE {
{
SELECT DISTINCT ?item ?location ?distance ?isa WHERE {
?item wdt:P31/wdt:P279* wd:Q486972.
?item wdt:P31 ?isa .
SERVICE wikibase:around {
?item wdt:P625 ?location.
bd:serviceParam wikibase:center "Point(LON LAT)"^^geo:wktLiteral;
wikibase:radius 5;
wikibase:distance ?distance.
}
}
}
MINUS { ?item wdt:P582 ?endTime . }
OPTIONAL { ?item wdt:P373 ?commonsCat. }
OPTIONAL { ?commonsSiteLink schema:about ?item;
schema:isPartOf <https://commons.wikimedia.org/>. }
SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
} ORDER BY (?distance)"""
query = query_template.replace("LAT", lat).replace("LON", lon)
reply = geocode.wdqs(query)
return reply["results"]["bindings"]
query = render_template("sparql/geosearch.sparql", lat=lat, lon=lon)
return geocode.wikidata.wdqs(query)
def wdqs_geosearch(lat, lon):
@ -260,7 +197,7 @@ def lat_lon_to_wikidata(lat, lon):
return {"elements": elements, "result": result}
elements = get_osm_elements(lat, lon)
elements = geocode.overpass.get_osm_elements(lat, lon)
result = do_lookup(elements, lat, lon)
# special case because the City of London is admin_level=6 in OSM
@ -290,85 +227,28 @@ def index():
lat = request.args.get("lat")
lon = request.args.get("lon")
if lat is None or lon is None:
samples.sort(key=lambda row: row[2])
return render_template("index.html", samples=samples)
if lat is not None and lon is not None:
return jsonify(lat_lon_to_wikidata(lat, lon)["result"])
return jsonify(lat_lon_to_wikidata(lat, lon)["result"])
def get_elements(oql):
return geocode.run_query(oql).json()["elements"]
def is_in_lat_lon(lat, lon):
oql = f"""
[out:json][timeout:25];
is_in({lat},{lon})->.a;
(way(pivot.a); rel(pivot.a););
out bb tags qt;"""
return geocode.run_query(oql)
samples = sorted(geocode.samples, key=lambda row: row[2])
return render_template("index.html", samples=samples)
def lookup_scottish_parish_in_wikidata(code):
query = """
SELECT ?item ?itemLabel ?commonsSiteLink ?commonsCat WHERE {
?item wdt:P528 "CODE" .
?item wdt:P31 wd:Q5124673 .
OPTIONAL { ?commonsSiteLink schema:about ?item ;
schema:isPartOf <https://commons.wikimedia.org/> }
OPTIONAL { ?item wdt:P373 ?commonsCat }
SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
}
""".replace(
"CODE", code
)
reply = geocode.wdqs(query)
return reply["results"]["bindings"]
query = render_template("sparql/scottish_parish.sparql", code=code)
return geocode.wikidata.wdqs(query)
def lookup_gss_in_wikidata(gss):
query = """
SELECT ?item ?itemLabel ?commonsSiteLink ?commonsCat WHERE {
?item wdt:P836 GSS .
OPTIONAL { ?commonsSiteLink schema:about ?item ;
schema:isPartOf <https://commons.wikimedia.org/> }
OPTIONAL { ?item wdt:P373 ?commonsCat }
SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
}
""".replace(
"GSS", repr(gss)
)
reply = geocode.wdqs(query)
return reply["results"]["bindings"]
query = render_template("sparql/lookup_gss.sparql", gss=gss)
return geocode.wikidata.wdqs(query)
def lookup_wikidata_by_name(name, lat, lon):
query = (
"""
SELECT DISTINCT ?item ?itemLabel ?commonsSiteLink ?commonsCat WHERE {
?item rdfs:label LABEL@en .
FILTER NOT EXISTS { ?item wdt:P31 wd:Q17362920 } .# ignore Wikimedia duplicated page
OPTIONAL { ?commonsSiteLink schema:about ?item ;
schema:isPartOf <https://commons.wikimedia.org/> }
OPTIONAL { ?item wdt:P373 ?commonsCat }
?item wdt:P625 ?coords .
FILTER(geof:distance(?coords, "Point(LON LAT)"^^geo:wktLiteral) < 10)
FILTER(?commonsCat || ?commonsSiteLink)
SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
}
""".replace(
"LABEL", repr(name)
)
.replace("LAT", str(lat))
.replace("LON", str(lon))
query = render_template(
"sparql/lookup_by_name.sparql", name=repr(name), lat=str(lat), lon=str(lon)
)
reply = geocode.wdqs(query)
return reply["results"]["bindings"]
return geocode.wikidata.wdqs(query)
def unescape_title(t):
@ -391,20 +271,6 @@ def get_commons_cat_from_gss(gss):
return commons_from_rows(lookup_gss_in_wikidata(gss))
def get_osm_elements(lat, lon):
filename = f"cache/{lat}_{lon}.json"
if use_cache and os.path.exists(filename):
elements = json.load(open(filename))["elements"]
else:
r = is_in_lat_lon(lat, lon)
if use_cache:
open(filename, "wb").write(r.content)
elements = r.json()["elements"]
return elements
def osm_lookup(elements, lat, lon):
elements.sort(key=lambda e: bounding_box_area(e))
@ -422,7 +288,7 @@ def osm_lookup(elements, lat, lon):
continue
if "wikidata" in tags:
qid = tags["wikidata"]
commons = geocode.qid_to_commons_category(qid)
commons = geocode.wikidata.qid_to_commons_category(qid)
if commons:
return {
"wikidata": qid,

19
templates/sparql/geosearch.sparql Normal file
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@ -0,0 +1,19 @@
SELECT DISTINCT ?item ?distance ?itemLabel ?isa ?isaLabel ?commonsCat ?commonsSiteLink WHERE {
{
SELECT DISTINCT ?item ?location ?distance ?isa WHERE {
?item wdt:P31/wdt:P279* wd:Q486972.
?item wdt:P31 ?isa .
SERVICE wikibase:around {
?item wdt:P625 ?location.
bd:serviceParam wikibase:center "Point({{ lon }} {{ lat }})"^^geo:wktLiteral;
wikibase:radius 5;
wikibase:distance ?distance.
}
}
}
MINUS { ?item wdt:P582 ?endTime . }
OPTIONAL { ?item wdt:P373 ?commonsCat. }
OPTIONAL { ?commonsSiteLink schema:about ?item;
schema:isPartOf <https://commons.wikimedia.org/>. }
SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
} ORDER BY (?distance)"""

14
templates/sparql/lookup_by_name.sparql Normal file
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@ -0,0 +1,14 @@
SELECT DISTINCT ?item ?itemLabel ?commonsSiteLink ?commonsCat WHERE {
?item rdfs:label {{ name }}@en .
FILTER NOT EXISTS { ?item wdt:P31 wd:Q17362920 } .# ignore Wikimedia duplicated page
OPTIONAL { ?commonsSiteLink schema:about ?item ;
schema:isPartOf <https://commons.wikimedia.org/> }
OPTIONAL { ?item wdt:P373 ?commonsCat }
?item wdt:P625 ?coords .
FILTER(geof:distance(?coords, "Point({{ lon }} {{ lat }})"^^geo:wktLiteral) < 10)
FILTER(?commonsCat || ?commonsSiteLink)
SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
}

8
templates/sparql/lookup_gss.sparql Normal file
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@ -0,0 +1,8 @@
SELECT ?item ?itemLabel ?commonsSiteLink ?commonsCat WHERE {
?item wdt:P836 {{ gss }} .
OPTIONAL { ?commonsSiteLink schema:about ?item ;
schema:isPartOf <https://commons.wikimedia.org/> }
OPTIONAL { ?item wdt:P373 ?commonsCat }
SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
}

8
templates/sparql/scottish_parish.sparql Normal file
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@ -0,0 +1,8 @@
SELECT ?item ?itemLabel ?commonsSiteLink ?commonsCat WHERE {
?item wdt:P528 "{{ code }}" .
?item wdt:P31 wd:Q5124673 .
OPTIONAL { ?commonsSiteLink schema:about ?item ;
schema:isPartOf <https://commons.wikimedia.org/> }
OPTIONAL { ?item wdt:P373 ?commonsCat }
SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
}