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Overpass Get England District Cyclable Density CSV
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| import requests | |
| import csv | |
| import time | |
| with open("district_merged2.csv", newline="", encoding="utf-8") as f: | |
| reader = csv.DictReader(f) | |
| districts = [row for row in reader if row] | |
| def length_query(selector): | |
| return f""" | |
| [out:json][timeout:180]; | |
| {selector}; | |
| map_to_area->.district; | |
| // Collect all rideable categories | |
| ( | |
| /* Bridleways */ | |
| way(area.district) | |
| ["highway"="bridleway"] | |
| ["access"!~"no"] | |
| ["bicycle"!~"no"]; | |
| /* Bridleways by designation on other highway types */ | |
| way(area.district) | |
| ["designation"~"public_bridleway"] | |
| ["access"!~"no"] | |
| ["bicycle"!~"no"]; | |
| /* ── Restricted byways ── */ | |
| way(area.district) | |
| ["designation"="restricted_byway"] | |
| ["access"!~"no"] | |
| ["bicycle"!~"no"]; | |
| /* ── BOATs ── */ | |
| way(area.district) | |
| ["designation"="byway_open_to_all_traffic"] | |
| ["access"!~"no"] | |
| ["bicycle"!~"no"]; | |
| /* ── Cycleways ── */ | |
| way(area.district) | |
| ["highway"="cycleway"] | |
| ["access"!~"no"] | |
| ["bicycle"!~"no"]; | |
| way(area.district) | |
| ["cycleway"="yes"] | |
| ["access"!~"no"] | |
| ["bicycle"!~"no"]; | |
| /* ── Shared-use paths & tracks ── */ | |
| way(area.district) | |
| ["highway"="footway"] | |
| ["area"!="yes"] | |
| ["bicycle"~"^(designated|yes|permissive)$"]; | |
| way(area.district) | |
| ["highway"="path"] | |
| ["area"!="yes"] | |
| ["bicycle"~"^(designated|yes|permissive)$"]; | |
| way(area.district) | |
| ["highway"="track"] | |
| ["area"!="yes"] | |
| ["bicycle"~"^(designated|yes|permissive)$"]; | |
| )->.all; | |
| // Aggregate to a single record with total length | |
| for.all (1) {{ | |
| make stats | |
| ways=count(ways), | |
| length_km=sum(length())/1000; | |
| out; | |
| }} | |
| // Display | |
| out geom; | |
| """ | |
| print("District,Area,CyclableLength,CyclableDensity") | |
| def overpass_call(query): | |
| while True: | |
| url = "https://overpass-api.de/api/interpreter" | |
| response = requests.get(url, params={"data": query}) | |
| # print(response.text) | |
| if "probably too busy" in response.text or "rate_limited" in response.text: | |
| # print(response.text) | |
| # print("sleeping") | |
| time.sleep(10) | |
| else: | |
| return response.json() | |
| seen = False | |
| for district in districts: | |
| # jank | |
| if "," in district["Name"]: | |
| district["Name"] = '"' + district["Name"] + '"' | |
| print(district["Name"], end=",") | |
| print(district["Area"], end=",") | |
| selector = f"""rel | |
| ["boundary"="administrative"] | |
| ["type"="boundary"] | |
| ["ref:gss"="{district["GSS"]}"]""" | |
| if district["Name"] in ["East Staffordshire", "Lichfield", "Stafford", "Staffordshire Moorlands", "Tamworth", "North Warwickshire", "Nuneaton and Bedworth", "Rugby", "Warwick"]: | |
| selector = f"""rel["boundary"="administrative"]["admin_level"="8"]["name"="{district["Name"]}"]""" | |
| query = length_query(selector) | |
| raw = overpass_call(query) | |
| elements = raw["elements"] | |
| if len(elements) == 0: | |
| print("No response") | |
| exit() | |
| first_element = raw["elements"][0] | |
| length = first_element["tags"]["length_km"] | |
| print(round(float(length), 2), end=",") | |
| print(round(1000 * float(length) / int(district["Area"])), end="") | |
| print() |
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