Several tags at once (union)

The same kind of place is often tagged in more than one way. A union, written as statements in parentheses, collects the results of several searches into one set.

The query

[out:json][timeout:60];
area["name"="Zürich"]["admin_level"="8"]->.a;
(
  node["amenity"="drinking_water"](area.a);
  node["amenity"="fountain"](area.a);
  node["man_made"="water_tap"](area.a);
);
out;

Run it

Live result from overpass.ch, cached for up to 12 hours. Map data © OpenStreetMap contributors (ODbL).

How it works

1. Each line in the parentheses is an ordinary search. All of them use the same area a.
2. The union removes duplicates, so an element that matches twice is returned once.
3. Not every fountain gives drinkable water. To be strict, add ["drinking_water"="yes"] to the fountain line.

Variations

• A regular expression is a shorter way to match several values of the same key: see regular expressions on tag values.

Run it from your code

curl https://api.overpass.ch/v1/YOUR_API_KEY/interpreter \
  --data-urlencode 'data@query.overpassql'

import requests

query = open("query.overpassql").read()
r = requests.post("https://api.overpass.ch/v1/YOUR_API_KEY/interpreter",
                  data={"data": query}, timeout=120)
r.raise_for_status()
print(r.json()["elements"][:3])

const res = await fetch("https://api.overpass.ch/v1/YOUR_API_KEY/interpreter", {
  method: "POST",
  body: new URLSearchParams({ data: query }),
});
if (!res.ok) throw new Error(await res.text());
console.log(await res.json());

Save the query as query.overpassql. It works the same in Overpass Turbo, QGIS and JOSM.