graphhopper_routing.py

import pandas as pd
import urllib.request

### GRAPHOPPER API ###
urlStart = 'http://localhost:8989/route/?'
point = 'point='
urlEnd = '&type=gpx&instructions=false&vehicle=car'
separator = '%2C'

### SOURCE POINT ###
startY = '12.9716'
startX = '77.5946' 

### DESTINATION POINT ###
start1X = '12.95296573'
start1Y = '77.70433044'

req = urlStart + point + startY + separator + startX + '&' + point + start1X + separator + start1Y + urlEnd
resp = urllib.request.urlopen(req)
gpxData  = str(resp.read(),'utf-8')
#save it as a gpx file 
fileName = 'roadpath'
saveFile = open('{0}.gpx'.format(fileName), 'w')
saveFile.write(gpxData)
saveFile.close()

### CONTINUE FROM HERE IF YOU ALREADY HAVE THE GPX FILE ###
import gpxpy
gpx_file = open('roadpath.gpx', 'r')
gpx = gpxpy.parse(gpx_file)

#EXTRACT THE LATLONGS IN THE GPX FILE 
latlongs = []
for track in gpx.tracks:
    for segment in track.segments:
        for point in segment.points:
            latlongs.append((point.latitude,point.longitude))
 
from ipyleaflet import Map, Polyline, Marker
center = latlongs[int(len(latlongs)/2)]

### RUN THIS ON JUPYTER TO PLOT THE ROAD PATH ###

line = Polyline(
    locations = latlongs,
    color = "green" ,
    )
m = Map(center = center, zoom =12)
m.add_layer(line)
m