def build(cls, data, start, end, center=None):
log.info("Loading OpenPaths data...")
if center is not None:
points = [Point(i, float(d['lon']), float(d['lat']), d['t']) for i, d in enumerate(data) if d['t'] >= start and d['t'] <= end and science.geo_distance((float(d['lon']), float(d['lat'])), center) <= RADIUS]
else:
points = [Point(i, float(d['lon']), float(d['lat']), d['t']) for i, d in enumerate(data) if d['t'] >= start and d['t'] <= end]
points.sort(key=lambda p: p.t)
log.info("Generating graph...")
start_clock = time.clock()
paths = Path.find_paths(points)
places = Place.find_places(paths, CLUSTER_RADIUS)
cities = City.find_cities(places, CITY_RADIUS)
almanac = Almanac(points, paths, places, cities)
# almanac.label()
print("(%ss)" % (time.clock() - start_clock))
return almanac
