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Add transport mode car

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This commit is contained in:
Rafa de la Torre
2016-07-06 18:05:51 +02:00
parent 6d888a7a62
commit 54221fa671
1 changed files with 11 additions and 5 deletions
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16
server/lib/python/cartodb_services/cartodb_services/mapzen/isolines.py
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@@ -36,17 +36,21 @@ class MapzenIsolines:
logging.debug('transport_mode = %s' % transport_mode)
logging.debug('isorange = %d' % isorange)
if transport_mode == 'walk':
upper_rmax = 3.3333333 * isorange # an upper bound for the radius, assuming 12km/h walking speed
costing_model = 'pedestrian'
elif transport_mode == 'car':
upper_rmax = 41.67 * isorange # assuming 140km/h max speed
costing_model = 'auto'
else:
raise NotImplementedError('car and walk are the only supported modes for the moment')
if transport_mode != 'walk':
# TODO move this restriction to the appropriate place
raise NotImplementedError('walk is the only supported mode for the moment')
# Formally, a solution is an array of {angle, radius, lat, lon, cost} with cardinality NUMBER_OF_ANGLES
# we're looking for a solution in which abs(cost - isorange) / isorange <= TOLERANCE
# Initial setup
angles = self._get_angles(self.NUMBER_OF_ANGLES) # array of angles
upper_rmax = 3.3333333 * isorange # an upper bound for the radius, assuming 12km/h walking speed
rmax = [upper_rmax] * self.NUMBER_OF_ANGLES
rmin = [0.0] * self.NUMBER_OF_ANGLES
location_estimates = [self._calculate_dest_location(origin, a, upper_rmax / 2.0) for a in angles]
@@ -56,8 +60,10 @@ class MapzenIsolines:
# Calculate the "actual" cost for each location estimate.
# NOTE: sometimes it cannot calculate the cost and returns None.
# Just assume isorange and stop the calculations there
response = self._matrix_client.one_to_many([origin] + location_estimates, 'pedestrian')
response = self._matrix_client.one_to_many([origin] + location_estimates, costing_model)
costs = [(c['time'] or isorange) for c in response['one_to_many'][0][1:]]
logging.debug('i = %d, costs = %s' % (i, costs))
errors = [(cost - isorange) / float(isorange) for cost in costs]