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Update reverse_geocode_py_fn, improve location detection, ignore tag road or highway. Recursive over lower zoom level.

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xbgmsharp
2023-10-28 21:55:29 +02:00
parent 9532075bc4
commit 9aecda4752
1 changed files with 50 additions and 40 deletions
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26
initdb/02_3_3_signalk_public_functions_py.sql
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@@ -16,7 +16,8 @@ CREATE SCHEMA IF NOT EXISTS public;
-- https://github.com/CartoDB/labs-postgresql/blob/master/workshop/plpython.md
--
DROP FUNCTION IF EXISTS reverse_geocode_py_fn;
CREATE OR REPLACE FUNCTION reverse_geocode_py_fn(IN geocoder TEXT, IN lon NUMERIC, IN lat NUMERIC,
DROP FUNCTION public.reverse_geocode_py_fn;
CREATE OR REPLACE FUNCTION reverse_geocode_py_fn(IN geocoder TEXT, IN lon NUMERIC, IN lat numeric,
OUT geo jsonb)
AS $reverse_geocode_py$
import requests
@@ -39,15 +40,16 @@ AS $reverse_geocode_py$
plpy.error('Error missing parameters')
return None
def georeverse(geocoder, lon, lat, zoom="18"):
# Make the request to the geocoder API
# https://operations.osmfoundation.org/policies/nominatim/
payload = {"lon": lon, "lat": lat, "format": "jsonv2", "zoom": 18}
payload = {"lon": lon, "lat": lat, "format": "jsonv2", "zoom": zoom, "accept-language": "en"}
# https://nominatim.org/release-docs/latest/api/Reverse/
r = requests.get(url, headers = {"Accept-Language": "en-US,en;q=0.5"}, params=payload)
# Parse response
# Option1: If name is null fallback to address field road,neighbourhood,suburb
# Option2: Return the json for future reference like country
# If name is null fallback to address field tags: neighbourhood,suburb
# if none repeat with lower zoom level
if r.status_code == 200 and "name" in r.json():
r_dict = r.json()
#plpy.notice('reverse_geocode_py_fn Parameters [{}] [{}] Response'.format(lon, lat, r_dict))
@@ -60,8 +62,8 @@ AS $reverse_geocode_py$
elif "address" in r_dict and r_dict["address"]:
if "neighbourhood" in r_dict["address"] and r_dict["address"]["neighbourhood"]:
return { "name": r_dict["address"]["neighbourhood"], "country_code": country_code }
elif "road" in r_dict["address"] and r_dict["address"]["road"]:
return { "name": r_dict["address"]["road"], "country_code": country_code }
elif "hamlet" in r_dict["address"] and r_dict["address"]["hamlet"]:
return { "name": r_dict["address"]["hamlet"], "country_code": country_code }
elif "suburb" in r_dict["address"] and r_dict["address"]["suburb"]:
return { "name": r_dict["address"]["suburb"], "country_code": country_code }
elif "residential" in r_dict["address"] and r_dict["address"]["residential"]:
@@ -70,16 +72,24 @@ AS $reverse_geocode_py$
return { "name": r_dict["address"]["village"], "country_code": country_code }
elif "town" in r_dict["address"] and r_dict["address"]["town"]:
return { "name": r_dict["address"]["town"], "country_code": country_code }
elif "amenity" in r_dict["address"] and r_dict["address"]["amenity"]:
return { "name": r_dict["address"]["amenity"], "country_code": country_code }
else:
return { "name": "n/a", "country_code": country_code }
if (zoom == 15):
plpy.notice('georeverse recursive retry with lower zoom than:[{}], Response [{}]'.format(zoom , r.json()))
return georeverse(geocoder, lon, lat, 14)
else:
plpy.notice('georeverse recursive retry with lower zoom than:[{}], Response [{}]'.format(zoom , r.json()))
return georeverse(geocoder, lon, lat, 15)
else:
return { "name": "n/a", "country_code": country_code }
else:
plpy.warning('Failed to received a geo full address %s', r.json())
#plpy.error('Failed to received a geo full address %s', r.json())
return { "name": "unknown", "country_code": "unknown" }
$reverse_geocode_py$ TRANSFORM FOR TYPE jsonb LANGUAGE plpython3u;
return georeverse(geocoder, lon, lat)
$reverse_geocode_py$ TRANSFORM FOR TYPE jsonb LANGUAGE plpython3u;
-- Description
COMMENT ON FUNCTION
public.reverse_geocode_py_fn