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isolines.py
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# Updating for Isoline Routing API v8
import folium
import pandas as pd
import geopandas as gpd
from shapely.geometry import Point,Polygon
import requests
import folium
from pathlib import Path
import flexpolyline as fp
import uuid
def isochrone_request(
point,
time_range='600',
oord='destination',
heretime='2020-01-29T09:00:00',
transport_mode='car', #car,truck,pedestrian
routing_mode='fast', #fast,short, - should only apply to distance
optimize_for = 'quality',#quality,balanced,performance
max_points = None,
avoid_features=None,#"tollRoad,controlledAccessHighway,ferry,carShuttleTrain,tunnel,dirtRoad,difficultTurns",
api_key=None,
):
''' Requires global `hereApiKey`'''
params = {'apiKey': api_key, 'range[type]': 'time'}
if oord=='destination':
params['destination'] = str(point[0]) + ',' + str(point[1])
params['arrivalTime'] = heretime #+ '-04:00'
elif oord=='origin':
params['origin'] = str(point[0]) + ',' + str(point[1])
params['departureTime'] = heretime #+ '-04:00'
else:
print('Error: oord should be "origin" or "destination"')
params['transportMode'] = transport_mode
params['routingMode'] = routing_mode
params['range[values]'] = time_range
if max_points:
params['shape[maxPoints]'] = str(max_points)
params['optimizeFor'] = optimize_for
if avoid_features:
params['avoid[features]'] = avoid_features
response = requests.get('https://isoline.router.hereapi.com/v8/isolines', params=params)
if (response.status_code != 200) or ('isolines' not in response.json()):
print(f'Error: Reponse: {response.status_code}',response.json())
return gpd.GeoDataFrame(),response
isolines = response.json()['isolines']
polygons_per_isoline = [len(isoline['polygons']) for isoline in isolines]
if max(polygons_per_isoline) > 1:
print("ERROR: An isolines has more than one polygon.")
ranges = [isoline['range'] for isoline in isolines]
names = [r['value'] for r in ranges]
#print(isolines)
if isolines[0]['polygons'] == []:
# Handle Error where no polygon is returned by returning just the point
print('Error',isolines,params,response.json())
the_point = Point(float(point[1]),float(point[0]))
isochrones = gpd.GeoDataFrame(names,crs='epsg:4326',columns=['range'],geometry=[Polygon([the_point,the_point,the_point])])
else:
polygons = [Polygon([(p[1],p[0]) for p in fp.decode(isoline['polygons'][0]['outer'])]) for isoline in isolines]
isochrones = gpd.GeoDataFrame(names,geometry=polygons,crs='epsg:4326',columns=['range'])
return isochrones, response
def isochrone_request_v7(
point,
time_range='600',
oord='destination',
heretime='2020-01-29T09:00:00',
transport_mode='car', #car,truck,pedestrian
routing_mode='fast', #fast,short,
optimize_for = 'quality',#quality,balanced,performance
max_points = None,
avoid_features=None,#"tollRoad,controlledAccessHighway,ferry,carShuttleTrain,tunnel,dirtRoad,difficultTurns",
api_key=None,
):
'''
Translates a v8 style request into a v7 request and then gets the results.
'''
params = {'apiKey': api_key}
if oord=='destination':
params['destination'] = 'geo!' + str(point[0]) + ',' + str(point[1])
params['arrival'] = heretime
snap_point_label = 'destination'
elif oord=='origin':
params['start'] = 'geo!' + str(point[0]) + ',' + str(point[1])
params['departure'] = heretime
snap_point_label = 'start'
else:
print('Error: oord should be "origin" or "destination"')
# Translate Routing Mode
routing_mode_to_type_map = {'fast':'fastest','short':'shortest','balanced':'balanced'} # Balanced will not be used as it is not in v8
routing_type = routing_mode_to_type_map[routing_mode]
params['mode'] = routing_type + ';'
params['mode'] += transport_mode + ';' # Ignores carHOV, publicTransport, publicTransportTimeTable and bicycle as these are not in v8
params['mode'] += 'traffic:enabled'
params['rangeType'] = 'time'
params['range'] = time_range
if max_points:
params['maxPoints'] = str(max_points)
optimize_for_to_quality = {'quality':1,'balanced':2,'performance':3}
params['quality'] = optimize_for_to_quality[optimize_for]
if avoid_features:
#TODO translae avoid_features into 4th param in mode - RouteFeatureType
pass
#params['avoid[features]'] = avoid_features
# V7 only params
params['singlecomponent'] = 'false' #This differs from how I previously ran catchments
#TODO params['requestId'] = Used to trace request through the system
response = requests.get('https://isoline.route.ls.hereapi.com/routing/7.2/calculateisoline.json', params=params)
response_json = response.json()['response']
if (response.status_code != 200) or ('isoline' not in response_json):
print(f'Error: Reponse: {response.status_code}',response_json)
return gpd.GeoDataFrame(),response
isolines = response_json['isoline']
polygons_per_isoline = [len(isoline['component']) for isoline in isolines]
if max(polygons_per_isoline) > 1:
print("ERROR: An isoline has more than one polygon.")
# ranges = [isoline['range'] for isoline in isolines]
# names = [r['value'] for r in ranges]
names = [isoline['range'] for isoline in isolines]
if isolines[0]['component'] == []:
# Handle Error where no polygon is returned by returning just the point
print('Error',isolines,params,response_json)
the_point = Point(float(point[1]),float(point[0]))
isochrones = gpd.GeoDataFrame(names,crs='epsg:4326',columns=['range'],geometry=[Polygon([the_point,the_point,the_point])])
else:
polygons = [Polygon([(float(p[1]),float(p[0])) for p in [point.split(',') for point in isoline['component'][0]['shape']]]) for isoline in isolines]
isochrones = gpd.GeoDataFrame(names,geometry=polygons,crs='epsg:4326',columns=['range'])
# Get `Mapped Position` of input point snapped to a road.
#print(response_json)
snap_point = response_json[snap_point_label]['mappedPosition'] #Dict with {'latitude':,'longitude':} #NEW
isochrones['snap_lat'] = snap_point['latitude']
isochrones['snap_lon'] = snap_point['longitude']
return isochrones, response
def isoline_version_request(requestId=None):
if requestId == None:
requestId = str(uuid.uuid4())
params = {'X-Request-ID':requestId}
response = requests.get('https://isoline.router.hereapi.com/v8/version?', params=params)
response.raise_for_status()
return response.json()
def map_catchments(catchments,start_loc = None):
'''Requires that `range` be an identifier for each catchment row.'''
if start_loc is None:
start_loc = (catchments.iloc[0].snap_lat,catchments.iloc[0].snap_lon)
m = folium.Map(
location=start_loc,
tiles='Stamen Toner',
zoom_start=12
)
for range_value in catchments.range[::-1]:
folium.features.GeoJson(
catchments[catchments['range'] == range_value],
style_function=lambda feature: {
'fillColor': 'red',#feature['properties']['fillColor'],
'opacity': 1,#feature['properties']['opacity'],
'fillOpacity': .2,#feature['properties']['fillOpacity'],
'color': 'red',#feature['properties']['color'],
'weight': 3,#feature['properties']['weight']
},
name = str(range_value/60)
).add_to(m)
folium.Circle(
radius=50,
location=start_loc,
popup=f'Location: {start_loc}',
color='black',
fill=False,
).add_to(m)
folium.TileLayer('cartodbpositron').add_to(m)
folium.TileLayer('OpenStreetMap').add_to(m)
folium.LayerControl().add_to(m)
return m
def isochrone_batch_request(
point,
time_ranges='600',
oord='origin',
heretime='2020-01-29T09:00:00',
transport_mode='car', #car,truck,pedestrian
routing_mode='fast', #fast,short,
optimize_for = 'quality',#quality,balanced,performance
max_points = None,
avoid_features=None,#"tollRoad,controlledAccessHighway,ferry,carShuttleTrain,tunnel,dirtRoad,difficultTurns",
api_key=None,
):
''' DEPRECATED - Requires global `hereApiKey`
Not Currently Used, single request at a time is made from app.py in order to track progress.
'''
print(point,time_ranges,oord,heretime,transport_mode,routing_mode,optimize_for,max_points,avoid_features)
isochrone_list = []
response_list = []
for time_range in time_ranges.split(','):
isochrone, response = isochrone_request(point,time_range=time_range,oord=oord,heretime=heretime,transport_mode=transport_mode,optimize_for = optimize_for, max_points = max_points, avoid_features=avoid_features,api_key = api_key)
isochrone_list.append(isochrone)
response_list.append(response)
isochrones = pd.concat(isochrone_list)
responses = response_list
versionJson = isoline_version_request()
return isochrones, responses, versionJson
def isochrone_group_request(
point,
time_ranges='600',
oord='origin',
heretime='2020-01-29T09:00:00',
transport_mode='car', #car,truck,pedestrian
routing_mode='fast', #fast,short,
optimize_for = 'balance',#quality,balanced,performance
max_points = None,
avoid_features=None,#"tollRoad,controlledAccessHighway,ferry,carShuttleTrain,tunnel,dirtRoad,difficultTurns",
api_key=None,
):
""" DEPRECATED
Now using isochrone_batch_request as requesting many time ranges at once provides less fidelity on smaller rings.
"""
print(point,time_ranges,oord,heretime,transport_mode,routing_mode,optimize_for,max_points,avoid_features)
params = {'apiKey': api_key, 'range[type]': 'time'}
if oord=='destination':
params['destination'] = str(point[0]) + ',' + str(point[1])
params['arrivalTime'] = heretime
else:
params['origin'] = str(point[0]) + ',' + str(point[1])
params['departureTime'] = heretime
params['transportMode'] = transport_mode
params['routingMode'] = routing_mode
params['range[values]'] = time_ranges
if max_points:
params['shape[maxPoints]'] = str(max_points)
params['optimizeFor'] = optimize_for
if avoid_features:
params['avoid[features]'] = avoid_features
response = requests.get('https://isoline.router.hereapi.com/v8/isolines?', params=params)
if response.status_code != 200:
print(f'Error: Reponse: {response.status_code}',response.json())
return gpd.GeoDataFrame(),response
isolines = response.json()['isolines']
polygons_per_isoline = [len(isoline['polygons']) for isoline in isolines]
if max(polygons_per_isoline) > 1:
print("ERROR: An isolines has more than one polygon.")
ranges = [isoline['range'] for isoline in isolines]
names = [r['value'] for r in ranges]
#TODO add in location and orignalLocatino from request
polygons = [Polygon([(p[1],p[0]) for p in fp.decode(isoline['polygons'][0]['outer'])]) for isoline in isolines]
isochrones = gpd.GeoDataFrame(names,geometry=polygons,crs='epsg:4326',columns=['range'])
return isochrones, response