NetworkReader

CSV files

static NetworkReader.readFromFile(path, formatfile='DEFAULT', verbose=True)

Read a network from CSV file with geometry structured in coordinates.

Before to load network data, you need to have a format defined in network_file_format (in tracklib/resources directory) which describes metadata of the file. If it doesn’t exists, you need to create one format.

For example, let’s define a format call ‘VTT’ in the file network_file_format which corresponds to a network associated with mountain bike tracks. So, you add a new line like this:

VTT, 1, 2, 3, 0, -1, 4, c, 1, True, UTF-8, GEO

where:

• the first value ‘VTT’ represents the format name,

• the second value ‘1’ represents the index of column containing edge identifier in the CSV file

• the third value ‘2’ represents index of column containing source node identifier in the CSV file

• the fourth value ‘3’ represents index of column containing target node identifier in the CSV file

• the fifth value ‘0’ represents index of column containing geometry of edge in wkt format in the CSV file. You can specify also optional parameters:

• a path cost (arbitrarily set to be proportional to the length of the WKT if unlined (-1))

• an orientation index. An integer arbitrarily set to: 0 to indicate two-way, 1 direct way and -1 indirect way

• the separating characters (can be multiple characters). Can be: c (comma), b (blankspace), s (semi-column)

• the number of heading line in format

• true to manage double quote

• the encoding like utf-8

• srid: coordinate system of points (ENU, Geo or ECEF)

Parameters

type path:

str

param path:

file or directory

type formatfile:

Union[str, NetworkFormat]

param formatfile:

name of format which describes metadata of the file

rtype:

Network

return:

network.

WFS service

static NetworkReader.requestFromIgnGeoportail(bbox, tolerance=0.0001, spatialIndex=True, proxy=None)

Return type:

Network

Parameters

type bbox:

Bbox

param bbox:

The bounding box of the selected area (The bounding box must be expressed in WGS84).

type tolerance:

param tolerance:

parameter specifies the maximum distance accepted for merging two nodes (edge ends)

type proxy:

param proxy:

name of proxy or proxy parameters in a dictionnary. parameter connexion defined in the tracklib/resources/proxy file