pychrone

Python 3 module for generatings isochrones from point

How to install

You can install python-digitalocean using pip

pip install -U pychrone

or via sources:

python setup.py install

If you have serveral python versions installed you will probably use pip3 and python3 commands accordingly.

Features

This module generates walking isochrone from the set point with defined latitude and longtitude with defined time.

All details of walking routes and coordinates are from OpenStreetMap, so you will need an internet connection for this module to work.

Also module will try to optimize isochrone shape with α-shape algorithm to make it more natural and clean.

Main function of module takes the following arguments:

Create_isochrone(longtitude, latitude, speed=4.5, output="geojson")

• longitude - longitude of point to create isochrone from;
• latitude - latitude of point to create isochrone from;
• speed - pedestrian speed in km/h, default is 4.5;
• output - output format, default is "geojson", wich generates valid GeoJSON polygon. Other option is "shape", that generates Shapely object.

Usage:

In this small example module will return 5-minute isochrone from point with coordinates (37.847591, 55.920284) in GeoJSON format assuming pedestrian speed as 4.5 km/h.

IN:

from pychrone import Create_isochrone

Create_isochrone(37.847591, 55.920284, 5)

OUT:

{"coordinates": [[[37.8460729, 55.9174363], [37.8464059, 55.9175894], [37.847672, 55.9178994], [37.8485452, 55.9179112], [37.8489915, 55.9179172], [37.8490785, 55.9179534], [37.8502528, 55.918252], [37.8508537, 55.9190215], [37.8521326, 55.9193121], [37.8523401, 55.9195966], [37.8523826, 55.9196535], [37.8526471, 55.920433], [37.8527015, 55.9206193], [37.852584, 55.9210867], [37.8512857, 55.9218685], [37.8500913, 55.9216824], [37.8481064, 55.9218883], [37.8480311, 55.9218827], [37.8464856, 55.9216235], [37.8458339, 55.9220129], [37.8452347, 55.9223078], [37.8451153, 55.9223076], [37.843753, 55.9214498], [37.8434385, 55.9211565], [37.8432352, 55.9210091], [37.843344, 55.9201537], [37.8436392, 55.9200188], [37.8442215, 55.9195563], [37.8445491, 55.9189478], [37.8453806, 55.9179848], [37.8458505, 55.9173872], [37.8460729, 55.9174363]]], "type": "Polygon"}