DonGraphio

Small utility library containing graph algorighms used in other projects.

Base usage example

pip install dongraphio

import geopandas as gpd
from dongraphio import DonGraphio
from dongraphio import GraphType
import networkx as nx
from shapely import Point

dongrph = DonGraphio(city_crs=32638)
    
intermodal_graph = dongrph.get_intermodal_graph_from_osm(city_osm_id=3955288)
nx.write_graphml(intermodal_graph,"city_intermodal.graphml")

builds_from = gpd.read_file("test_data/buildings.geojson")
services_to = gpd.read_file("test_data/services.geojson")
adjacency_matrix = dongrph.get_adjacency_matrix(gdf_from=builds_from, gdf_to=services_to, weight="time_min",graph_type=[GraphType.PUBLIC_TRANSPORT, GraphType.WALK])
adjacency_matrix.to_csv("city_adjacency_matrix.csv")

accessibility_isochrones, public_transport_routes, public_transport_stops = dongrph.get_accessibility_isochrones(
    graph_type=[GraphType.PUBLIC_TRANSPORT, GraphType.WALK],
    points=Point(571747,5709639),
    weight_value=15,
    weight_type="time_min",
)
accessibility_isochrones.to_file("city_accessibility_isochrones.geojson")
public_transport_routes.to_file("city_public_transport.geojson")
public_transport_stops.to_file("city_public_stops.geojson")

To get rid of GeoPandas warning message about Shapely one can use following construction in their code:

import os
os.environ["USE_PYGEOS"] = os.environ.get("USE_PYGEOS", "0")