Toss out IEM Shapefile parsing in favor of new VTEC parser
This commit is contained in:
XANTRONIX Industrial
parent
e7dc68d931
commit
a43dc50c03
2 changed files with 150 additions and 56 deletions
|
|
@ -1,45 +1,93 @@
|
|||
import re
|
||||
import enum
|
||||
import datetime
|
||||
import json
|
||||
import shapely
|
||||
import shapefile
|
||||
|
||||
from nexrad.db import DatabaseTable
|
||||
from nexrad.coord import COORD_SYSTEM
|
||||
|
||||
def parse_timestamp(text: str):
|
||||
size = len(text)
|
||||
RE_ID = re.compile(r'^(\d+)$')
|
||||
|
||||
if size == 8:
|
||||
fmt = '%Y%m%d'
|
||||
elif size == 10:
|
||||
fmt = '%Y%m%d%H'
|
||||
elif size == 12:
|
||||
fmt = '%Y%m%d%H%M'
|
||||
elif size == 14:
|
||||
fmt = '%Y%m%d%H%M%S'
|
||||
RE_ISSUANCE = re.compile(r'''
|
||||
^
|
||||
(WF[A-Z]{2}\d{2})
|
||||
[ ]{1}
|
||||
(?P<wfo>[A-Z]{4})
|
||||
[ ]{1}
|
||||
(?P<day>\d{2})
|
||||
(?P<hour>\d{2})
|
||||
(?P<minute>\d{2})
|
||||
$
|
||||
''', re.X)
|
||||
|
||||
return datetime.datetime.strptime(text, fmt).astimezone(datetime.UTC)
|
||||
RE_PHENOM = re.compile(r'''
|
||||
^/
|
||||
(?P<typeof>[OTEX])
|
||||
\.
|
||||
(?P<actions>[A-Z]{3})
|
||||
\.
|
||||
(?P<wfo>[A-Z]{4})
|
||||
\.
|
||||
(?P<phenom>[A-Z]{2})
|
||||
\.
|
||||
(?P<sig>[A-Z])
|
||||
\.
|
||||
(?P<etn>\d{4})
|
||||
\.
|
||||
(?P<time_start>\d{6}T\d{4}Z)
|
||||
-
|
||||
(?P<time_end>\d{6}T\d{4}Z)
|
||||
/$
|
||||
''', re.X)
|
||||
|
||||
def shape_to_geojson(shape: shapefile.Shape):
|
||||
return json.dumps(shape.__geo_interface__)
|
||||
RE_HYDRO = re.compile(r'''
|
||||
^/
|
||||
(?P<severity>[0N1])
|
||||
\.
|
||||
(?P<cause>[A-Z]{2})
|
||||
\.
|
||||
(?P<time_start>\d{6}T\d{4}Z)
|
||||
-
|
||||
(?P<time_end>\d{6}T\d{4}Z)
|
||||
\.
|
||||
(?P<record>[A-Z]{2})
|
||||
/$
|
||||
''', re.X)
|
||||
|
||||
class VTECType(enum.StrEnum):
|
||||
RE_POLY = re.compile(r'^LAT\.\.\.LON(?P<coords> \d{4})+')
|
||||
|
||||
def parse_timestamp(text: str, post_2016_05_11: bool):
|
||||
return datetime.datetime.strptime(
|
||||
text, '%y%m%dT%H%M%SZ'
|
||||
).astimezone(datetime.UTC)
|
||||
|
||||
class VTECEventType(enum.StrEnum):
|
||||
OPERATIONAL = 'O'
|
||||
TEST = 'T'
|
||||
EXPERIMENTAL = 'E'
|
||||
EXPERIMENTAL_VTEC = 'X'
|
||||
|
||||
class VTEC(DatabaseTable):
|
||||
class VTECEventParserState(enum.Enum):
|
||||
NONE = 1
|
||||
HEADER = enum.auto()
|
||||
ISSUANCE = enum.auto()
|
||||
META = enum.auto()
|
||||
TYPEOFFICE = enum.auto()
|
||||
VTEC = enum.auto()
|
||||
BODY_SEP = enum.auto()
|
||||
BODY = enum.auto()
|
||||
POLY = enum.auto()
|
||||
FOOTER = enum.auto()
|
||||
|
||||
class VTECEvent(DatabaseTable):
|
||||
__table__ = 'nexrad_vtec_event'
|
||||
__key__ = 'id'
|
||||
|
||||
__columns__ = (
|
||||
'id', 'timestamp_issued', 'timestamp_expired',
|
||||
'timestamp_init_iss', 'timestamp_init_exp',
|
||||
'timestamp_updated', 'timestamp_poly_start',
|
||||
'timestamp_poly_end', 'event_id', 'wfo', 'sig', 'phenom',
|
||||
'status', 'hail_size', 'tornado_tag', 'damage_tag', 'poly'
|
||||
'id', 'timestamp_issued', 'timestamp_start', 'timestamp_end',
|
||||
'typeof', 'etn', 'actions', 'wfo', 'phenom', 'sig', 'body',
|
||||
'forecaster', 'poly',
|
||||
)
|
||||
|
||||
__columns_read__ = {
|
||||
|
|
@ -51,52 +99,99 @@ class VTEC(DatabaseTable):
|
|||
}
|
||||
|
||||
__columns_write__ = {
|
||||
'poly': 'SetSRID(GeomFromGeoJSON(:poly), {crs})'.format(crs=COORD_SYSTEM)
|
||||
'poly': 'ST_GeomFromText(:poly, {crs})'.format(crs=COORD_SYSTEM)
|
||||
}
|
||||
|
||||
__values_write__ = {
|
||||
'poly': lambda v: {'poly': shape_to_geojson(v)}
|
||||
'poly': lambda v: {'poly': shapely.to_wkt(v)}
|
||||
}
|
||||
|
||||
id: int
|
||||
poly: shapefile.Shape
|
||||
event_id: int
|
||||
timestamp_issued: datetime.datetime
|
||||
timestamp_start: datetime.datetime
|
||||
timestamp_end: datetime.datetime
|
||||
typeof: str
|
||||
actions: str
|
||||
wfo: str
|
||||
phenom: str
|
||||
sig: str
|
||||
etn: int
|
||||
body: str
|
||||
forecaster: str
|
||||
poly: shapely.Geometry
|
||||
|
||||
def parse_shape(self, coords: str):
|
||||
pass
|
||||
|
||||
@staticmethod
|
||||
def from_shapefile_record(record, shape):
|
||||
vtec = VTEC()
|
||||
vtec.id = None
|
||||
def parse(text: str):
|
||||
event = VTECEvent()
|
||||
state = VTECEventParserState.NONE
|
||||
|
||||
vtec.timestamp_issued = parse_timestamp(record['ISSUED'])
|
||||
vtec.timestamp_expired = parse_timestamp(record['EXPIRED'])
|
||||
vtec.timestamp_init_iss = parse_timestamp(record['INIT_ISS'])
|
||||
vtec.timestamp_init_exp = parse_timestamp(record['INIT_EXP'])
|
||||
vtec.timestamp_updated = parse_timestamp(record['UPDATED'])
|
||||
vtec.timestamp_poly_start = parse_timestamp(record['POLY_BEG'])
|
||||
vtec.timestamp_poly_end = parse_timestamp(record['POLY_END'])
|
||||
#
|
||||
# A timestamp post 11 May 2016 can be detected based on the
|
||||
# presence of lowercase letters in bulletin text, as per:
|
||||
#
|
||||
# https://www.noaa.gov/media-release/national-weather-service-will-stop-using-all-caps-in-its-forecasts
|
||||
#
|
||||
post_2016_05_11 = any(c for c in text if c.islower())
|
||||
|
||||
vtec.event_id = int(record['ETN']) if (record['ETN'] is not None and record['ETN'] != '') else None
|
||||
vtec.hail_size = float(record['HAILTAG']) if record['HAILTAG'] is not None else None
|
||||
vtec.wind_speed = float(record['WINDTAG']) if record['WINDTAG'] is not None else None
|
||||
issuance = None
|
||||
|
||||
vtec.status = record['STATUS']
|
||||
vtec.wfo = record['WFO']
|
||||
vtec.phenom = record['PHENOM']
|
||||
vtec.sig = record['SIG']
|
||||
vtec.tornado_tag = record['TORNTAG']
|
||||
vtec.damage_tag = record['DAMAGTAG']
|
||||
vtec.poly = shape
|
||||
for line in text.split('\n'):
|
||||
line = line.rstrip()
|
||||
|
||||
return vtec
|
||||
if state == VTECEventParserState.NONE:
|
||||
match = RE_ID.match(line)
|
||||
|
||||
@staticmethod
|
||||
def each_from_shapefile(path: str):
|
||||
sf = shapefile.Reader(path)
|
||||
if match is not None:
|
||||
event.id = int(match[1])
|
||||
state = VTECEventParserState.HEADER
|
||||
elif state == VTECEventParserState.HEADER:
|
||||
match = RE_ISSUANCE.match(line)
|
||||
|
||||
for i in range(0, sf.numRecords):
|
||||
record = sf.record(i)
|
||||
if match is not None:
|
||||
issuance = match
|
||||
state = VTECEventParserState.ISSUANCE
|
||||
elif state == VTECEventParserState.ISSUANCE:
|
||||
state = VTECEventParserState.META
|
||||
elif state == VTECEventParserState.META:
|
||||
match = RE_PHENOM.match(line)
|
||||
|
||||
if record['GTYPE'] != 'P':
|
||||
continue
|
||||
if match is not None:
|
||||
event.timestamp_start = parse_timestamp(match['time_start'], post_2016_05_11)
|
||||
event.timestamp_end = parse_timestamp(match['time_end'], post_2016_05_11)
|
||||
|
||||
yield VTEC.from_shapefile_record(record, sf.shape(i))
|
||||
event.typeof = match['typeof']
|
||||
event.actions = match['actions']
|
||||
event.wfo = match['wfo']
|
||||
event.phenom = match['phenom']
|
||||
event.sig = match['sig']
|
||||
event.etn = int(match['etn'])
|
||||
|
||||
state = VTECEventParserState.VTEC
|
||||
elif state == VTECEventParserState.VTEC:
|
||||
if line == '':
|
||||
state = VTECEventParserState.BODY_SEP
|
||||
elif state == VTECEventParserState.BODY_SEP:
|
||||
event.body = line
|
||||
state = VTECEventParserState.BODY
|
||||
elif state == VTECEventParserState.BODY:
|
||||
if line == '&&':
|
||||
state = VTECEventParserState.POLY
|
||||
else:
|
||||
event.body += '\n' + line
|
||||
elif state == VTECEventParserState.POLY:
|
||||
match = RE_POLY.match(line)
|
||||
|
||||
if match is not None:
|
||||
event.parse_shape(match['coords'])
|
||||
elif line == '$$':
|
||||
state = VTECEventParserState.FOOTER
|
||||
else:
|
||||
pass
|
||||
elif state == VTECEventParserState.FOOTER:
|
||||
if line != '':
|
||||
event.forecaster = line
|
||||
|
||||
return event
|
||||
|
|
|
|||
|
|
@ -1,3 +1,2 @@
|
|||
boto3>=1.36
|
||||
shapely>=2.0
|
||||
pyshp>=2.3.0
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue