def setStInShape(self,shpfile): """ Функция возвращает список станций попадающий в полигон(ы) из шэйпфайла файла """ import shapefile as shp import geocalc from shapely.geometry import Polygon,Point res=[] sf = shp.Reader(shpfile) for sp in sf.shapes(): res_tmp=[] lonmin,latmin,lonmax,latmax=sp.bbox lonmin,lonmax=geocalc.cLon(lonmin),geocalc.cLon(lonmax) if lonmin<0 or lonmax<0: polygonPoints=[[geocalc.cLon(cors[0]),cors[1]] for cors in sp.points] else: polygonPoints=sp.points poly=Polygon(polygonPoints) indsInBox=[ind for ind in self.stInds if lonmin<=geocalc.cLon(self.stMeta[ind]['lon'])<=lonmax and latmin<=self.stMeta[ind]['lat']<=latmax] for ind in indsInBox: lat,lon=self.stMeta[ind]['lat'], geocalc.cLon(self.stMeta[ind]['lon']) pnt=Point(lon,lat) if poly.contains(pnt): res_tmp.append(ind) res=res+res_tmp return list(set(res))
def setLatLon(self, year=None, month=None):
f, r = self.getDataObj(self.firstObservation.year, self.firstObservation.month)
self.lat = f.select('Latitude')
self.latvals = self.lat.get()[:,0]
self.lon = f.select('Longitude')
self.lonvals = [cLon(v) for v in self.lon.get()[0,:]]
self.seaLandMask = f.select('LandSeaMask').get()
return self.latvals, self.lonvals
def __init__(self, fn, convert=True):
fn=os.path.abspath(fn)
try:
self.f=nc.Dataset(fn)
except RuntimeError:
raise IOError, "no such file or dir %s"%fn
if self.f.project_id!='CMIP5':
print 'projet_id is "%s" not "CMIP5"'%self.f.project_id
# определяем основную переменную в массиве, это так которая зависит от трёх других
dtList=[v for v in self.f.variables if self.f.variables[v].ndim==3]
if len(dtList)>1:
dtList=[tmpDt for tmpDt in dtList if tmpDt in elSynom]
if len(dtList)>1: raise TypeError, "Unknown data type in nc file"
self.dt=dtList[0]
if self.dt=='tas' and convert is True:
from tempConvert import kelvin2celsius
self.convertValue=lambda val,year,month: kelvin2celsius(val)
self.convertArray=lambda arr: np.subtract(arr,273.15)
elif self.dt=='pr' and convert is True:
if self.f.frequency=='day':
from precConvert import si2mmPerDay
self.convertValue=si2mmPerDay
elif self.f.frequency=='mon':
from precConvert import si2mmPerMonth
self.convertValue=si2mmPerMonth
self.convertArray=np.vectorize(lambda val: val*86400*30.5, otypes=[np.float])
else:
self.convertValue=lambda val,year,month: val
self.convertArray=lambda arr: arr
# print "Warning! There is no converter for data type = '%s'"%self.dt
self.var=self.f.variables[self.dt]
self.lat=self.f.variables['lat']
self.latvals=[self.lat[l] for l in range(self.lat.size)]
self.lon=self.f.variables['lon']
self.lonvals=[cLon(self.lon[l]) for l in range(self.lon.size)]
if self.f.variables['time'].units=='days since 1-01-01 00:00:00':
self.timeUnits='days since 0001-01-01 00:00:00'
elif self.f.variables['time'].units=='days since 850-1-1 00:00:00':
self.timeUnits='days since 0850-1-1 00:00:00'
else:
self.timeUnits=self.f.variables['time'].units
try:
self.startDate=nc.num2date(self.f.variables['time'][0], self.timeUnits,
self.f.variables['time'].calendar)
except ValueError:
raise
print 'Warning! failed to parse date string -%s. Model id - %s. startDate set to 0850-1-1 assuming model is MPI'%(self.f.variables['time'].units,self.f.model_id)
# if self.f.variables['time'].units=='days since 1-01-01 00:00:00':
# self.startDate=datetime(1,1,1)
# else:
# print 'Warning! failed to parse date string -%s. Model id - %s. startDate '\
# 'set to 0850-1-1 assuming model is MPI'%(self.f.variables['time'].units,self.f.model_id)
# self.startDate=datetime(850,1,1)
self.startYear = int(self.startDate.year)
self.startMonth = int(self.startDate.month)
self.warningShown = False
self.cliSetMeta = {'modelId':self.f.model_id, 'calendar':self.f.variables['time'].calendar, 'source':fn,
'scenario':self.f.experiment_id, 'dt':self.dt}
def setLatLon(self, latName='lat', lonName='lon'): self.lat=self.f.variables[latName] self.latvals=[self.lat[l] for l in range(self.lat.size)] self.lon=self.f.variables[lonName] self.lonvals=[cLon(self.lon[l]) for l in range(self.lon.size)]