Usage: 3.4. Writing Data: CSV

Writing a network to CSV

Available as a jupyter notebook or wiki page.

Let's read in a sample MATSim network into GeNet's Network object.

from genet import read_matsim
import os

path_to_matsim_network = '../example_data/pt2matsim_network'

network = os.path.join(path_to_matsim_network, 'network.xml')
schedule = os.path.join(path_to_matsim_network, 'schedule.xml')
vehicles = os.path.join(path_to_matsim_network, 'vehicles.xml')
n = read_matsim(
    path_to_network=network, 
    epsg='epsg:27700', 
    path_to_schedule=schedule, 
    path_to_vehicles=vehicles
)
# you don't need to read the vehicles file, but doing so ensures all vehicles
# in the schedule are of the expected type and the definition of the vehicle
# is preserved
n.print()

Graph info: Name: 
Type: MultiDiGraph
Number of nodes: 1662
Number of edges: 3166
Average in degree:   1.9049
Average out degree:   1.9049 
Schedule info: Schedule:
Number of services: 9
Number of routes: 68
Number of stops: 118

You can export the genet.Network and the Schedule (if applicable) to CSV.

n.write_to_csv('../example_data/output_csv')

2022-07-14 15:34:30,652 - Saving Network to CSV in ../example_data/output_csv/network
2022-07-14 15:34:30,746 - Saving Schedule to GTFS csv in ../example_data/output_csv/schedule
2022-07-14 15:34:30,990 - Saving ../example_data/output_csv/schedule/stops.csv
2022-07-14 15:34:30,994 - Saving ../example_data/output_csv/schedule/routes.csv
2022-07-14 15:34:30,996 - Saving ../example_data/output_csv/schedule/trips.csv
2022-07-14 15:34:31,006 - Saving ../example_data/output_csv/schedule/stop_times.csv
2022-07-14 15:34:31,039 - Saving ../example_data/output_csv/schedule/calendar.csv

The node and link CSVs describing the network will include any and all data stored as attributes on the graph---in contrast to the MATSim output which will only include attributes included in the MATSim network schema.

For Schedule the outputs are saved to GTFS CSV files. Some data is lost when saving Schedule to GTFS, for example the relationship and paths between network and schedule. The details of this schema and what is lost can be found in Section/Notebook 3.3 Writing GTFS data.