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# http://pyrocko.org - GPLv3 # # The Pyrocko Developers, 21st Century # ---|P------/S----------~Lg----------
global coastlines if coastlines is None: logger.debug('Initialising GSHHG database.') coastlines = gshhg.GSHHG.intermediate() return coastlines
if method == 'topo': elevation = topo.elevation(lat, lon) if elevation is None: return False else: return topo.elevation(lat, lon) > 0.
elif method == 'coastlines': is_land = get_gsshg().is_point_on_land(lat, lon) logger.debug( 'Testing %.4f %.4f: %s' % (lat, lon, 'dry' if is_land else 'wet'))
return is_land
lat_min_ = 0.5*(math.sin(lat_min * math.pi/180.)+1.) lat_max_ = 0.5*(math.sin(lat_max * math.pi/180.)+1.) return math.asin(rstate.uniform(lat_min_, lat_max_)*2.-1.)*180./math.pi
for itry in range(ntries): logger.debug('%s: try %i' % (label, itry)) lat = random_lat(rstate) lon = rstate.uniform(-180., 180.) if not avoid_water or is_on_land(lat, lon): return lat, lon
if avoid_water: sadd = ' (avoiding water)'
raise LocationGenerationError('Could not generate location%s.' % sadd)
if None in (xmin, xmax): return xdefault else: return rstate.uniform(xmin, xmax)
optional=True, help='Random seed for a reproducible scenario.')
self.clear() self._retry_offset += 1 for val in self.T.ivals(self): if isinstance(val, Generator): val.retry()
self._seed = None
return hashlib.sha1( (self.dump() + '\n\n%i' % self._retry_offset).encode('utf8'))\ .hexdigest()
return int(self.hash(), base=16) % N
val.update_hierarchy(parent=self) el.update_hierarchy(parent=self)
if self._seed is None: if self.seed is None: if self._parent is not None: self._seed = self._parent.get_seed() else: self._seed = num.random.randint(N) elif self.seed == 0: self._seed = num.random.randint(N) else: self._seed = self.seed
return self._seed + self.get_seed_offset()
return num.random.RandomState(int(self.get_seed() + i))
return self._parent.get_center_latlon()
return self._parent.get_radius()
return []
default=True, help='Set whether wet areas should be avoided.') optional=True, help='Center latitude for the random locations in [deg].') optional=True, help='Center longitude for the random locations in [deg].') optional=True, help='Radius for distribution of random locations [m].') default=10, help='Maximum number of tries to find a location satisifying all ' 'given constraints') optional=True, help='If given, lower bound of random northward cartesian offset [m].') optional=True, help='If given, upper bound of random northward cartesian offset [m].') optional=True, help='If given, lower bound of random eastward cartesian offset [m].') optional=True, help='If given, upper bound of random eastward cartesian offset [m].') optional=True, help='If given, minimum depth [m].') optional=True, help='If given, maximum depth [m].')
Generator.clear(self) self._center_latlon = None
if (self.center_lat is None) != (self.center_lon is None): raise ScenarioError( 'Set both: lat and lon, or neither of them (in %s).' % self.__class__.__name__)
if self._center_latlon is None:
if self.center_lat is not None and self.center_lon is not None: self._center_latlon = self.center_lat, self.center_lon
else: if self._parent: self._center_latlon = self._parent.get_center_latlon() else: rstate = self.get_rstate(0) self._center_latlon = random_latlon( rstate, self.avoid_water, self.ntries, self.__class__.__name__)
return self._center_latlon
if self.radius is not None: return self.radius elif self._parent is not None: return self._parent.get_radius() else: return None
rstate = self.get_rstate((i+1)*3+0) for itry in range(self.ntries): logger.debug('%s: try %i' % (self.__class__.__name__, itry)) radius = self.get_radius() if radius is None: lat = random_lat(rstate) lon = rstate.uniform(-180., 180.) elif radius == 0.0: lat, lon = self.get_center_latlon() else: lat_center, lon_center = self.get_center_latlon() while True: north = rstate.uniform(-radius, radius) east = rstate.uniform(-radius, radius) if math.sqrt(north**2 + east**2) <= radius: break
lat, lon = od.ne_to_latlon(lat_center, lon_center, north, east)
if not self.avoid_water or is_on_land(lat, lon): logger.debug('location ok: %g, %g' % (lat, lon)) return lat, lon
if self.avoid_water: sadd = ' (avoiding water)'
raise LocationGenerationError('Could not generate location%s.' % sadd)
rstate = self.get_rstate((i+1)*3+1) north_shift = random_uniform( rstate, self.north_shift_min, self.north_shift_max, 0.0) east_shift = random_uniform( rstate, self.east_shift_min, self.east_shift_max, 0.0)
return north_shift, east_shift
rstate = self.get_rstate((i+1)*3+1) return random_uniform( rstate, self.depth_min, self.depth_max, 0.0)
lat, lon = self.get_latlon(i) north_shift, east_shift = self.get_cartesian_offset(i) depth = self.get_depth(i) return lat, lon, north_shift, east_shift, depth |