A Python interface to the OpenStreetMap Overpass API
Project description
Overpass API python wrapper
Python bindings for the OpenStreetMap Overpass API.
Install it
pip install overpass
Usage
API()
constructor
First, create an API object.
import overpass
api = overpass.API()
The API constructor takes several parameters, all optional:
endpoint
The default endpoint is https://overpass-api.de/api/interpreter
but
you can pass in another instance:
api = overpass.API(endpoint="https://overpass.myserver/interpreter")
timeout
The default timeout is 25 seconds, but you can set it to whatever you want.
api = overpass.API(timeout=600)
debug
Setting this to True
will get you debug output.
Getting data from Overpass: get()
Most users will only ever need to use the get()
method. There are some convenience query methods for common queries as well, see below.
response = api.get('node["name"="Salt Lake City"]')
response
will be a dictionary representing the
JSON output you would get from the Overpass API
directly.
Note that the Overpass query passed to get()
should not contain any out
or other meta statements. See verbosity
below for how to control the output.
Another example:
>>> print [(
... feature['properties']['name'],
... feature['id']) for feature in response["features"]]
[(u'Salt Lake City', 150935219), (u'Salt Lake City', 585370637)]
You can find more examples in the examples/
directory of this repository.
The get()
method takes a few parameters, all optional having sensible defaults.
verbosity
You can set the verbosity of the Overpass query out
directive using the same keywords Overpass does. In order of increased verbosity: ids
, skel
, body
, tags
, meta
. As is the case with the Overpass API itself, body
is the default.
>>> import overpass
>>> api = overpass.API()
>>> data = api.get('way(42.819,-73.881,42.820,-73.880);(._;>;)', verbosity='geom')
>>> [f for f in data.features if f.geometry['type'] == "LineString"]
(from a question on GIS Stackexchange)
responseformat
You can set the response type of your query using get()
's responseformat
parameter to GeoJSON (geojson
, the default), plain JSON (json
), CSV (csv
), and OSM XML (xml
).
response = api.get('node["name"="Salt Lake City"]', responseformat="xml")
If you choose csv
, you will need to specify which fields you want, as described here in the Overpass QL documentation. An example:
response = api.get('node["name"="Springfield"]["place"]', responseformat="csv(name,::lon,::lat)")
The response will be a list of lists:
[
['name', '@lon', '@lat'],
['Springfield', '-3.0645656', '56.2952787'],
['Springfield', '0.4937446', '51.7487585'],
['Springfield', '-2.4194716', '53.5732892'],
['Springfield', '25.5454526', '-33.9814866'],
....
]
build
We will construct a valid Overpass QL query from the parameters you set by default. This means you don't have to include 'meta' statements like [out:json]
, [timeout:60]
, [out body]
, etcetera. You just supply the meat of the query, the part that actually tells Overpass what to query for. If for whatever reason you want to override this and supply a full, valid Overpass QL query, you can set build
to False
to make the API not do any pre-processing.
date
You can query the data as it was on a given date. You can give either a standard ISO date alone (YYYY-MM-DD) or a full overpass date and time (YYYY-MM-DDTHH:MM:SSZ, i.e. 2020-04-28T00:00:00Z).
You can also directly pass a date
or datetime
object from the datetime
library.
Pre-cooked Queries: MapQuery
, WayQuery
In addition to just sending your query and parse the result, overpass
provides shortcuts for often used map queries. To use them, just pass
them like to normal query to the API.
MapQuery
This is a shorthand for a complete ways and relations query in a bounding box (the 'map call'). You just pass the bounding box to the constructor:
MapQuery = overpass.MapQuery(50.746,7.154,50.748,7.157)
response = api.get(MapQuery)
WayQuery
This is shorthand for getting a set of ways and their child nodes that satisfy certain criteria. Pass the criteria as a Overpass QL stub to the constructor:
WayQuery = overpass.WayQuery('[name="Highway 51"]')
response = api.get(WayQuery)
Testing
Using pytest
.
py.test
FAQ
I need help or have an idea for a feature
Create a new issue.
Where did the CLI tool go?
The command line tool was deprecated in version 0.4.0.
See also
There are other python modules that do similar things.
Project details
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