Hi, I’m trying to calculate the distance matrix between 9 cities.
I’ve implemented the distance matrix exactly the same way as the example on the ORS GitHub python repository (https://github.com/GIScience/openrouteservice-py/blob/9fc22f378db8f9ef98a1675031055b1ae2bec97b/examples/basic_example.ipynb). I get the correct distance and times for 7 out of the 9 cities, while the remaining 2 cities return distances and times of ‘None’.
My code is as follows:
import openrouteservice as ors
import folium
client = ors.Client(key=‘ORSKey’)
m = folium.Map(location=[22.937506, -30.559482], tiles=‘cartodbpositron’, zoom_start=13) #folium — Folium 0.14.0 documentation
coordinates = [[26.4463605889411, -32.1540273871439],
[26.8672642069916, -28.6144032334478],
[28.1257789858759, -26.1061469151442],
[30.7485588070194, -28.7165849266373],
[29.2897631723233, -23.7853352498787],
[30.2989842255136, -25.8736514600477],
[25.5196480753104, -26.2681354867569],
[21.4028091591807, -29.4534052770319],
[20.6160379293236, -33.01454785206833]
]
matrix = client.distance_matrix(
locations=coordinates,
profile=‘driving-hgv’,
metrics=[‘distance’, ‘duration’],
units = ‘km’,
validate=True,
)
for marker in coordinates:
folium.Marker(location=list(reversed(marker))).add_to(m)
print(“Durations in secs: {}\n”.format(matrix[‘durations’]))
print(“Distances in km: {}”.format(matrix[‘distances’]))
m
My output matrix is as follows:
Distances in km: [[0.0, 522.94, 849.5, 1029.21, 1167.97, 1119.38, 942.81, None, None], [522.88, 0.0, 334.47, 487.94, 652.93, 604.34, 608.76, None, None], [853.31, 338.51, 0.0, 515.41, 329.41, 290.57, 343.5, None, None], [1030.06, 487.63, 509.17, 0.0, 731.45, 511.97, 808.66, None, None], [1168.74, 653.94, 334.57, 738.21, 0.0, 437.33, 617.92, None, None], [1118.64, 603.84, 284.44, 511.92, 430.45, 0.0, 592.27, None, None], [943.0, 608.6, 326.25, 808.97, 616.67, 593.15, 0.0, None, None], [None, None, None, None, None, None, None, None, None], [None, None, None, None, None, None, None, None, None]]
I’d really appreciate any assistance, thanks in advance!
