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mapmatch_batch.py
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mapmatch_batch.py
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"""Test mapmatch."""
import csv
import os
import time
import copy
import errno
from pprint import pprint
import asap_orcycle as asap
import stats
import pg_tools_orcycle as pg
import orcycle_gps
import web_mapping as wm
import json
def gmap(gps, route, gmap_path, case, trip_id, srid=4326, nextmap=None):
"""Write a google map html file with points and route."""
# create gmap output dir if not exists
try:
os.makedirs(gmap_path + str(trip_id))
except OSError as exception:
if exception.errno != errno.EEXIST:
raise
gmap_file = gmap_path + trip_id + '/' + str(case) + '.html'
if nextmap:
nextmap = str(nextmap) + '.html'
extent = gps.get_extent()
gmap = wm.Gmap((extent[1] + extent[3]) / 2.0,
(extent[0] + extent[2]) / 2.0, 17)
points = gps.points
start = True
for p in points:
if p.kwargs.get('trip', -999) == case:
if start:
gmap.addpoint(p.lat, p.lng, color='#009933', radius=3)
start = False
else:
gmap.addpoint(p.lat, p.lng)
elif p.kwargs.get('trip'):
gmap.addpoint(p.lat, p.lng, color='#808080')
else:
gmap.addpoint(p.lat, p.lng, color='#FFFFFF')
if route:
lines = pg.LineCollection(srid=srid, lines=route.links[:])
lines.get_geom(db_conn, vertices=True)
lines.transform(4326, db_conn)
for line in lines.lines:
path = [(y,x) for x, y in line.vertices]
gmap.addpath(path)
gmap.draw(gmap_file, extent, title=case, next=nextmap)
## print ('gmap output written to {}'
## .format(gmap_file, tripnum))
#### USER SETTINGS ####
with open('/Users/bblanc/OneDrive/_BikeAppProject/ORcycle_Analysis_Tool_Suite/orcycler_environment/mapMatching/userSettings.json') as data_file:
userSettings = json.load(data_file)
print(userSettings)
working_directory = userSettings["working_directory"]
db_pass = userSettings["db_credentials"]["db_pass"]
db_user = userSettings["db_credentials"]["db_user"]
db_name = userSettings["db_credentials"]["db_name"]
db_schema = userSettings["db_credentials"]["db_schema"]
gps_path = 'data/coordsForMatching.csv' # relative path to GPS points csv file
## Network settings
net_table = 'wbnet2012' # network table
net_sql = 'bik_rest != 1 ' # (optional) body of SQL where clause to select network links
# Ex) 'bik_rest != 1' or '' to omit
## Map match parameters
max_candidates = 20 # [40] number of unique route candidates to track
# lower increases speed at expense of accuracy
# 20-40 seems to be a reasonable range
max_radius = 1000 # [1000] maximum radius to search for initial link
# candidates. Little downside to larger search
# radius and can help if trip start is noisy.
initial_candidates = 25 # [25] target number of initial candidates.
# Radius will expand until either this number
# or max_radius reached
max_angle_flags = 999 # [2] Number of angle flags (heading perpendicular to
# link) before link abandoned. Set to 999 to ignore
# headings. Angle flags can be problematic if signal
# is noisy. Worth experimenting.
max_dist_ratio = 1.05 # [1.05] Max GPS distance/link distance before link
# abandoned. Has only small effect in our tests.
# Reasonable range is 1.0-1.25
## Output settings
gmap_output = True # Output html google maps in specified directory
# Files will be named by caseid unless path ends
# with .html, in which case file will be overwritten
# each time (good for manual mod debugging).
gmap_path = ('results/google_gmaps/') # relative path to write gmap files
# if path ends in .html,
# file will overwrite each
# time
psql_output = True # Append route and link results to existing psql tables
db_conn = pg.db_conn({'user': db_user, 'pass': db_pass,
'db': db_name})
os.chdir(working_directory)
# check to be sure data accessible
try:
open(gps_path)
except IOError:
print 'data location {} not accessible'.format(working_directory + gps_path)
raise IOError
if gmap_output:
# create gmap output dir if not exists
try:
os.makedirs(gmap_path)
except OSError as exception:
if exception.errno != errno.EEXIST:
raise
print 'gmap output is ON'
print 'gmaps will go to', gmap_path
else:
print 'gmap output is OFF'
if psql_output:
print 'psql output is ON'
else:
print 'psql output is OFF'
if net_sql:
print 'network restrictions in effect: {}'.format(net_sql)
print 'Loading network...'
network = pg.Network(db_conn, db_schema + '.' + net_table,
length_attr='length_m', id_attr='psuid',
sql=net_sql, geom_attr='geom')
print 'Loading data...'
deployments = asap.Deployment(gps=(gps_path, orcycle_gps),
astable_gps='trip_id')
index = 1
trip_id = None
t1 = time.time()
for trip_id in sorted(deployments.gps):
print ('{}, {} of {}, {:.1f} minutes so far'
.format(trip_id, index, len(deployments.gps),
(time.time() - t1) / 60.0))
gps = deployments.gps[trip_id]
#print '{} points loaded'.format(len(gps.points))
# create dummy deployment for just this trip
d = asap.Deployment(gps=({trip_id: deployments.gps[trip_id]}, orcycle_gps))
#print 'Reprojecting...'
gps.get_geom2(db_conn)
gps.transform2(2838, db_conn)
#print 'Screening...'
# For now, this is in same units as GPS file
gps.screen(max_spd=40, max_accel=10, min_altitude=-100,
max_altitude=9999, min_spd=0.45, debug=False)
#print 'Masking...'
gps.mask(db_conn)
gps.get_accel()
gps.split_trips(deploy_start=None, min_trip_pts=10,
max_time_gap=300,
num_near_points=30, search_radius=15,
min_bundle_density=10.0, min_bundle_ratio=2.0/3.0,
min_bundle_time=120, sequence_length=15,
max_time_zero_spd=120, zero_spd=0.01,
attribute_points=True, debug=False)
print '{} trip(s) detected'.format(len(gps.trips))
tripnum = 1
for trip in gps.trips:
trip.get_stats()
# Hack to keep track of original and split trip nums
trip.kwargs['trip_id'] = trip_id
trip.num = tripnum
trip.gps.get_geom2(db_conn)
#print 'Map matching {} of {}...'.format(tripnum, len(gps.trips))
t2 = time.time()
m = pg.MapMatch(db_conn, trip.gps, network, check=False)
route = m.solve(max_radius=max_radius, max_dist_ratio=max_dist_ratio,
initial_candidates=25, max_candidates=20,
u_turn=False, max_angle_flags=999, oneway_wt=0.0,
attribute_points=False, min_match_links=2,
max_route_aps=75, max_link_mps=75, max_odd_links=3,
fallback='gps', pos_tol=0.001)
if route:
print ('possible route found: aps={:.1f}, odd={}, {:.1f} ms/pt'
.format(route.stats['aps'], route.stats['odd_links'],
(time.time() - t2) / len(trip.gps.points) * 1000))
#print ('avg point score: {:.1f} '
# '(PSU <25 acceptable match, <75 Schuessler & Axhausen)'
# .format(route.stats['aps']))
#print ('odd links: {} '
# '(3 is PSU and Schuessler & Axhausen max)'
# .format(route.stats['odd_links']))
#print ('{:.1f} ms/pt (expected performance is 20-50 ms/pt)'
# .format((time.time() - t2) / len(trip.gps.points) * 1000))
# sttach to dummy stage
trip.route = route
trip.route.get_geom(db_conn, srid=2838)
else:
print 'no route found with given parameters'
trip.route = None
if gmap_output:
gps4326 = pg.GPSCollection(srid=2838,
points=[copy.copy(p) for p in d.gps[trip_id].points])
gps4326.get_geom2(db_conn)
gps4326.transform2(4326, db_conn)
if tripnum == len(gps.trips):
nextmap = None
else:
nextmap = tripnum + 1
gmap(gps4326, route, gmap_path, tripnum, trip_id, srid=2838, nextmap=nextmap)
tripnum += 1
index += 1
trip_id = None
if psql_output:
d.write_psql(db_conn, db_schema,
GPSroutes='orc_gpsroutes',
GPSlinks='orc_gpslinks',
GPStripstages='orc_gpstrips')
print ''