Parse the OSRM data file into NumPy objects.

osrmparser.py

from struct import unpack
import numpy as np
import sys

#OSRM data type - nodes
node_dtype = np.dtype([('lat', '<i'), ('long', '<i'), ('id', '<I'), ('Flags', '<i')])

#Reading the .osrm file
f = open(sys.argv[1])
f.seek(156)  # Skip the header
numnodes = unpack('<I', f.read(4))[0]
osrm_node_data = np.fromfile(f, dtype=node_dtype, count=numnodes)

numedges = unpack('<I', f.read(4))[0]

edge_dtype = np.dtype([('source', '<I'),('dest', '<I'), ('length', '<i'),
                       ('direction','<h'), ('weight', '<i'),('edge_type', '<h'),
                       ('street_index', '<I'), ('flags', '<I')])

osrm_edge_data = np.fromfile(f, dtype=edge_dtype, count = numedges)


print "OSRM file contains {} nodes and {} edges".format(numnodes, numedges)