pyroutelib3 2.0.0

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pyroutelib3 2.0.0

pyroutelib3

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Simple routing over OSM data.
pyroutelib3 is a Python library for simple routing over
OpenStreetMap data.
import pyroutelib3

live_graph = pyroutelib3.osm.LiveGraph(pyroutelib3.osm.CarProfile())

start_node = live_graph.find_nearest_node((52.23201, 21.00737))
end_node = live_graph.find_nearest_node((52.24158, 21.02807))

route = pyroutelib3.find_route_without_turn_around(live_graph, start_node.id, end_node.id)
route_lat_lons = [live_graph.get_node(node).position for node in route]

The example above uses osm.LiveGraph, which automatically downloads OpenStreetMap data in tiles
and caches them on your disk. It is much more wise to download the data beforehand from a service
like Geofabrik OSM data extracts:
import pyroutelib3

with open("mazowieckie-latest.osm.pbf", "rb") as f:
graph = pyroutelib3.osm.Graph.from_file(pyroutelib3.osm.CarProfile(), f)

start_node = graph.find_nearest_node((52.23201, 21.00737))
end_node = graph.find_nearest_node((52.24158, 21.02807))

route = pyroutelib3.find_route_without_turn_around(graph, start_node, end_node)
route_lat_lons = [graph.get_node(node).position for node in route]

pyroutelib3 not only is able to parse OpenStreetMap data into a graph (see the osm module),
but also contains generic implementations of the A* path-finding algorithm (find_route and
find_route_without_turn_around functions) and the k-d tree data structure (KDTree class).
This library was designed with extensibility in mind, and most components can be swapped for
completely custom ones through the usage of well-defined protocols. As an example,
a nx.GraphAdaptor is provided to use networkx graphs
with pyroutelib3's functionality.
Installation
pip install --upgrade pyroutelib3

pyroutelib3 uses semantic versioning. Always specify dependencies on
this library with a constraint on the major revision, e.g. pyroutelib3 ~= 2.0.0.
Note that version 1 of this library is incompatible with version 2.
Features

Generic A* algorithm implementation (find_route and find_route_without_turn_around functions)
Generic graph data structure (SimpleGraph class)
Generic k-d data structure (KDTree class)
Extensibility through usage of well-defined protocols (protocols module)

networkx compatibility (nx.GraphAdaptor and
nx.ExternalGraphAdaptor classes)


OSM XML and OSM PBF
file parsing (osm.reader.read_features function)
Converting OpenStreetMap data into a usable graph (osm.Graph class)

High customizability of the process through the usage of different profiles.
Expressing way preferences through the usage of penalties for unpreferred tags
Respecting access restrictions on ways
Support for turn restrictions,
including restriction:TRANSPORT and exempt tags
Downloading data on-the-fly (osm.LiveGraph class)



License
pyroutelib3 is distributed under GNU GPL v3 (or any later version).

© Copyright 2024 Mikołaj Kuranowski
pyroutelib3 is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
pyroutelib3 is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with pyroutelib3. If not, see http://www.gnu.org/licenses/.