def _getvar(self, varkey):
datamap = self._datamap
stdname, stdunit = stdprops.get(varkey, (varkey, 'unknown'))
if varkey in datamap['surface'].dtype.names:
vhead = datamap['surface'][varkey]['head']
v11 = vhead['VAR1']
EXP = vhead['EXP']
props = dict([(pk, vhead[pk][0]) for pk in vhead.dtype.names
if pk not in ('YYMMDDHHFF', 'LEVEL')])
bytes = datamap['surface'][varkey]['data']
vdata = unpack(bytes, v11, EXP)
# if varkey == 'MXLR':
# CVAR, PREC, NEXP, VAR1, KSUM = pack2d(vdata[21], verbose = True)
out = PseudoNetCDFVariable(self,
varkey,
'f', ('time', 'y', 'x'),
values=vdata,
units=stdunit,
standard_name=stdname,
**props)
elif varkey in self._layvarkeys:
laykeys = datamap['layers'].dtype.names
mylaykeys = [
laykey for laykey in laykeys
if varkey in datamap['layers'][laykey].dtype.names
]
bytes = np.array([
datamap['layers'][lk][varkey]['data'] for lk in mylaykeys
]).swapaxes(0, 1)
vhead = np.array([
datamap['layers'][lk][varkey]['head'] for lk in mylaykeys
]).swapaxes(0, 1)
v11 = vhead['VAR1']
EXP = vhead['EXP']
props = dict([(pk, vhead[pk][0, 0]) for pk in vhead.dtype.names
if pk not in ('YYMMDDHHFF', 'LEVEL')])
props['LEVEL_START'] = vhead['LEVEL'][0, 0]
props['LEVEL_END'] = vhead['LEVEL'][-1, -1]
vdata = unpack(bytes, v11, EXP)
out = PseudoNetCDFVariable(self,
varkey,
'f', ('time', 'z', 'y', 'x'),
values=vdata,
units=stdunit,
standard_name=stdname,
**props)
if self._cache:
self.variables[varkey] = out
return out
def gettime(ifile):
from PseudoNetCDF import PseudoNetCDFVariable
from datetime import datetime, timedelta
if 'time' in ifile.variables:
time = ifile.variables['time']
unit = time.units
tunit, datestr = unit.split(' since ')
sdate = datetime.strptime(datestr.replace(
' UTC', ''), '%Y-%m-%d %H:%M:%S')
time = np.array([sdate + timedelta(**{tunit: t}) for t in time[:]])
unit = 'time'
elif 'TFLAG' in ifile.variables:
x = ifile.variables['TFLAG'][:].copy()
for axi in range(1, x.ndim - 1):
x = x[:, 0]
time = np.array(
[(datetime.strptime('%07d %06d' % (d, t), '%Y%j %H%M%S'))
for d, t in x])
unit = 'time'
elif 'time' in ifile.dimensions:
time = np.arange(len(ifile.dimensions['time']))
unit = 'steps'
elif 'TSTEP' in ifile.dimensions:
time = np.arange(1, len(ifile.dimensions['TSTEP']) + 1)
unit = 'steps'
else:
raise KeyError('No time found')
return PseudoNetCDFVariable(None, 'time', 'f', ('time',),
values=time[:], units=unit)
def __init__(self, path):
self.dimensions = {}
self.variables = {}
fobj = open(path)
jdate = int(fobj.readline().split()[0])
nlevels = int(fobj.readline().split()[0])
levels = [float(x) for x in fobj.readline().split()]
nlats = int(fobj.readline().split()[0])
lats = [float(x) for x in fobj.readline().split()]
nangles = int(fobj.readline().split()[0])
angles = [float(x) for x in fobj.readline().split()]
nrxns = int(fobj.readline().split()[0])
scaling = dict()
rxns = []
for ri in range(nrxns):
tname, scale = fobj.readline().split(',')
tname = tname.replace("'", "").strip()
scaling[tname] = eval(scale.strip())
rxns.append(tname)
lines = fobj.readlines()
header = re.compile('\s+\d+\s+\d+\s+\d+\s*')
data = []
headers = []
for line in lines:
if header.match(line):
headers.append(line)
else:
data.append(line)
data = np.fromstring(''.join(data), sep = ' ').reshape(nlevels, nlats, nrxns, nangles)
headers = np.fromstring(''.join(headers), sep = ' ').reshape(nlevels, nlats, nrxns, 3)
assert((np.diff(headers[..., 0], axis = 0) == 1).all())
assert((np.diff(headers[..., 1], axis = 1) == 1).all())
assert((np.diff(headers[..., 2], axis = 2) == 1).all())
self.SDATE = jdate
self.NLAYS = nlevels
self.NLATS = nlats
self.NANGLES = nangles
self.NRXNS = nrxns
self.createDimension('LAY', nlevels)
self.variables['LAY'] = PseudoNetCDFVariable(self, 'LAY', 'f', ('LAY',), values = np.array(levels, dtype = 'f'), units = 'm')
self.createDimension('LAT', nlats)
self.variables['LAT'] = PseudoNetCDFVariable(self, 'LAT', 'f', ('LAT',), values = np.array(lats, dtype = 'f'), units = 'degrees')
self.createDimension('ANGLE', nangles)
self.variables['ANGLE'] = PseudoNetCDFVariable(self, 'ANGLE', 'f', ('ANGLE',), values = np.array(angles, dtype = 'f'), units = 'hours from noon')
for rxni, rxn in enumerate(rxns):
self.variables[rxn] = PseudoNetCDFVariable(self, rxn, 'f', ('LAY', 'LAT', 'ANGLE'), values = data[..., rxni, :].copy(), units = 's**-1')
def _getvar(self, k):
datamap = self._datamap
if k in self._sfckeys:
vold = datamap['surface'][k]['head']['VAR1'].astype('f')
scale = 2.0**(7-datamap['surface'][k]['head']['EXP'].astype('i'))
invscale = 1. / scale
data = (datamap['surface'][k]['data'].view('uint8') - 127.) * invscale[:, None, None]
data[:, 0, 0] += vold
data[:, :, 0] = cumsum(data[:, :, 0], axis = 1)
vdata = cumsum(data, axis = 2)
return PseudoNetCDFVariable(self, k, 'f', ('time', 'y', 'x'), values = vdata, units = 'unknown')
elif k in self._laykeys:
vold = datamap['upper']['layers'][k]['head']['VAR1'].astype('f')
scale = 2.0**(7-datamap['upper']['layers'][k]['head']['EXP'].astype('i'))
invscale = 1. / scale
data = (datamap['upper']['layers'][k]['data'].view('uint8') - 127.) * invscale[:, :, None, None]
data[:, :, 0, 0] += vold
data[:, :, :, 0] = cumsum(data[:, :, :, 0], axis = 2)
vdata = cumsum(data, axis = 3)
return PseudoNetCDFVariable(self, k, 'f', ('time', 'z', 'y', 'x'), values = vdata, units = 'unknown')
def getmapdef(ifileo, add=True):
gridname = _gdnames[ifileo.GDTYP]
if add:
mapdef = ifileo.createVariable(gridname, 'i', ())
else:
from PseudoNetCDF import PseudoNetCDFVariable
mapdef = PseudoNetCDFVariable(ifileo, gridname, 'i', ())
mapdef.grid_mapping_name = gridname
if mapdef.grid_mapping_name == "latitude_longitude":
pass
elif mapdef.grid_mapping_name == "polar_stereographic":
mapdef.latitude_of_projection_origin = ifileo.P_ALP * 90
mapdef.straight_vertical_longitude_from_pole = ifileo.P_GAM
mapdef.standard_parallel = np.array([ifileo.P_BET], dtype='d')
# mapdef.standard_parallel = np.array([ifileo.P_BET], dtype = 'f')
else:
mapdef.standard_parallel = np.array([ifileo.P_ALP, ifileo.P_BET],
dtype='d')
if mapdef.grid_mapping_name != "latitude_longitude":
mapdef.latitude_of_projection_origin = ifileo.YCENT
mapdef.longitude_of_central_meridian = ifileo.XCENT
mapdef.false_northing = -ifileo.YORIG
mapdef.false_easting = -ifileo.XORIG
mapdef._CoordinateTransformType = "Projection"
mapdef._CoordinateAxes = "x y"
ioapi_sphere = get_ioapi_sphere()
mapdef.semi_major_axis = getattr(
ifileo, 'semi_major_axis',
getattr(ifileo, 'earth_radius', ioapi_sphere[0]))
mapdef.semi_minor_axis = getattr(
ifileo, 'semi_minor_axis',
getattr(ifileo, 'earth_radius', ioapi_sphere[1]))
return mapdef
def const(*args, **kwds):
vals = arange(24 * 4 * 5 * 6).reshape((24, 4, 5, 6))
dims = ('TSTEP', 'LAY', 'ROW', 'COL')
return PseudoNetCDFVariable(tncf, args[0], 'f', dims, values=vals)