def grib2nc(infn, outfn):
"""
Convert GRIB data file to netCDF data file.
:param infn: (*string*) Input GRIB data file name.
:param outfn: (*string*) Output netCDF data file name.
"""
#Open GRIB file
f = minum.addfile(infn)
#New netCDF file
ncfile = minum.addfile(outfn, 'c')
#Add dimensions
for dim in f.dimensions():
ncfile.adddim(dim.getShortName(), dim.getLength())
#Add global attributes
for attr in f.attributes():
ncfile.addgroupattr(attr.getName(), attr.getValues())
#Add variables
variables = []
for var in f.variables():
#print 'Variable: ' + var.getShortName()
nvar = ncfile.addvar(var.getShortName(), var.getDataType(), var.getDimensions())
for attr in var.getAttributes():
nvar.addattr(attr.getName(), attr.getValues())
variables.append(nvar)
#Create netCDF file
ncfile.create()
#Write data
for var in variables:
print 'Variable: ' + var.name
data = f[str(var.name)].read()
ncfile.write(var, data)
#Close netCDF file
ncfile.close()
print 'Convert finished!'
def grib2nc(infn, outfn):
"""
Convert GRIB data file to netCDF data file.
:param infn: (*string*) Input GRIB data file name.
:param outfn: (*string*) Output netCDF data file name.
"""
#Open GRIB file
f = minum.addfile(infn)
#New netCDF file
ncfile = minum.addfile(outfn, 'c')
#Add dimensions
for dim in f.dimensions():
ncfile.adddim(dim.getShortName(), dim.getLength())
#Add global attributes
for attr in f.attributes():
ncfile.addgroupattr(attr.getName(), attr.getValues())
#Add variables
variables = []
for var in f.variables():
#print 'Variable: ' + var.getShortName()
nvar = ncfile.addvar(var.getShortName(), var.getDataType(), var.getDimensions())
for attr in var.getAttributes():
nvar.addattr(attr.getName(), attr.getValues())
variables.append(nvar)
#Create netCDF file
ncfile.create()
#Write data
for var in variables:
print 'Variable: ' + var.name
data = f[str(var.name)].read()
ncfile.write(var, data)
#Close netCDF file
ncfile.close()
print 'Convert finished!'
def grads2nc(infn, outfn, big_endian=None):
"""
Convert GrADS data file to netCDF data file.
:param infn: (*string*) Input GrADS data file name.
:param outfn: (*string*) Output netCDF data file name.
:param big_endian: (*boolean*) Is GrADS data big_endian or not.
"""
#Open GrADS file
f = minum.addfile_grads(infn)
if not big_endian is None:
f.bigendian(big_endian)
#New netCDF file
ncfile = minum.addfile(outfn, 'c')
#Add dimensions
dims = []
for dim in f.dimensions():
dims.append(ncfile.adddim(dim.getShortName(), dim.getLength()))
xdim = f.finddim('X')
ydim = f.finddim('Y')
tdim = f.finddim('T')
xnum = xdim.getLength()
ynum = ydim.getLength()
tnum = tdim.getLength()
#Add global attributes
ncfile.addgroupattr('Conventions', 'CF-1.6')
for attr in f.attributes():
ncfile.addgroupattr(attr.getName(), attr.getValues())
#Add dimension variables
dimvars = []
for dim in dims:
dname = dim.getShortName()
if dname == 'T':
var = ncfile.addvar('time', 'int', [dim])
var.addattr('units', 'hours since 1900-01-01 00:00:0.0')
var.addattr('long_name', 'Time')
var.addattr('standard_name', 'time')
var.addattr('axis', dname)
tvar = var
elif dname == 'Z':
var = ncfile.addvar('level', 'float', [dim])
var.addattr('axis', dname)
else:
var = ncfile.addvar(dim.getShortName(), 'float', [dim])
if 'Z' in dname:
var.addattr('axis', 'Z')
else:
var.addattr('axis', dname)
dimvars.append(var)
#Add variables
variables = []
for var in f.variables():
print 'Variable: ' + var.getShortName()
vdims = []
for vdim in var.getDimensions():
for dim in dims:
if vdim.getShortName() == dim.getShortName():
vdims.append(dim)
#print vdims
nvar = ncfile.addvar(var.getShortName(), var.getDataType(), vdims)
nvar.addattr('fill_value', -9999.0)
for attr in var.getAttributes():
nvar.addattr(attr.getName(), attr.getValues())
variables.append(nvar)
#Create netCDF file
ncfile.create()
#Write variable data
for dimvar, dim in zip(dimvars, f.dimensions()):
if dim.getShortName() != 'T':
ncfile.write(dimvar, minum.array(dim.getDimValue()))
sst = datetime.datetime(1900,1,1)
for t in range(0, tnum):
st = f.gettime(t)
print st.strftime('%Y-%m-%d %H:00')
hours = (st - sst).total_seconds() // 3600
origin = [t]
ncfile.write(tvar, minum.array([hours]), origin=origin)
for var in variables:
print 'Variable: ' + var.name
if var.ndim == 3:
data = f[str(var.name)][t,:,:]
data[data==minum.nan] = -9999.0
origin = [t, 0, 0]
shape = [1, ynum, xnum]
data = data.reshape(shape)
ncfile.write(var, data, origin=origin)
else:
znum = var.dims[1].getLength()
for z in range(0, znum):
data = f[str(var.name)][t,z,:,:]
data[data==minum.nan] = -9999.0
origin = [t, z, 0, 0]
shape = [1, 1, ynum, xnum]
data = data.reshape(shape)
ncfile.write(var, data, origin=origin)
#Close netCDF file
ncfile.close()
print 'Convert finished!'
def grads2nc(infn, outfn, big_endian=None):
"""
Convert GrADS data file to netCDF data file.
:param infn: (*string*) Input GrADS data file name.
:param outfn: (*string*) Output netCDF data file name.
:param big_endian: (*boolean*) Is GrADS data big_endian or not.
"""
#Open GrADS file
f = minum.addfile_grads(infn)
if not big_endian is None:
f.bigendian(big_endian)
#New netCDF file
ncfile = minum.addfile(outfn, 'c')
#Add dimensions
dims = []
for dim in f.dimensions():
dims.append(ncfile.adddim(dim.getShortName(), dim.getLength()))
xdim = f.finddim('X')
ydim = f.finddim('Y')
tdim = f.finddim('T')
xnum = xdim.getLength()
ynum = ydim.getLength()
tnum = tdim.getLength()
#Add global attributes
ncfile.addgroupattr('Conventions', 'CF-1.6')
for attr in f.attributes():
ncfile.addgroupattr(attr.getName(), attr.getValues())
#Add dimension variables
dimvars = []
for dim in dims:
dname = dim.getShortName()
if dname == 'T':
var = ncfile.addvar('time', 'int', [dim])
var.addattr('units', 'hours since 1900-01-01 00:00:0.0')
var.addattr('long_name', 'Time')
var.addattr('standard_name', 'time')
var.addattr('axis', dname)
tvar = var
elif dname == 'Z':
var = ncfile.addvar('level', 'float', [dim])
var.addattr('axis', dname)
else:
var = ncfile.addvar(dim.getShortName(), 'float', [dim])
if 'Z' in dname:
var.addattr('axis', 'Z')
else:
var.addattr('axis', dname)
dimvars.append(var)
#Add variables
variables = []
for var in f.variables():
print 'Variable: ' + var.getShortName()
vdims = []
for vdim in var.getDimensions():
for dim in dims:
if vdim.getShortName() == dim.getShortName():
vdims.append(dim)
#print vdims
nvar = ncfile.addvar(var.getShortName(), var.getDataType(), vdims)
nvar.addattr('fill_value', -9999.0)
for attr in var.getAttributes():
nvar.addattr(attr.getName(), attr.getValues())
variables.append(nvar)
#Create netCDF file
ncfile.create()
#Write variable data
for dimvar, dim in zip(dimvars, f.dimensions()):
if dim.getShortName() != 'T':
ncfile.write(dimvar, minum.array(dim.getDimValue()))
sst = datetime.datetime(1900,1,1)
for t in range(0, tnum):
st = f.gettime(t)
print st.strftime('%Y-%m-%d %H:00')
hours = (st - sst).total_seconds() // 3600
origin = [t]
ncfile.write(tvar, minum.array([hours]), origin=origin)
for var in variables:
print 'Variable: ' + var.name
if var.ndim == 3:
data = f[str(var.name)][t,:,:]
data[data==minum.nan] = -9999.0
origin = [t, 0, 0]
shape = [1, ynum, xnum]
data = data.reshape(shape)
ncfile.write(var, data, origin=origin)
else:
znum = var.dims[1].getLength()
for z in range(0, znum):
data = f[str(var.name)][t,z,:,:]
data[data==minum.nan] = -9999.0
origin = [t, z, 0, 0]
shape = [1, 1, ynum, xnum]
data = data.reshape(shape)
ncfile.write(var, data, origin=origin)
#Close netCDF file
ncfile.close()
print 'Convert finished!'
def ncwrite(fn, data, varname, dims=None, attrs=None):
"""
Write a netCDF data file.
:param: fn: (*string*) netCDF data file path.
:param data: (*array_like*) A numeric array variable of any dimensionality.
:param varname: (*string*) Variable name.
:param dims: (*list of dimensions*) Dimension list.
"""
if dims is None:
if isinstance(data, MIArray):
dims = []
for s in data.shape:
dimvalue = arange(s)
dimname = 'dim' + str(len(dims))
dims.append(dimension(dimvalue, dimname))
else:
dims = data.dims
#New netCDF file
ncfile = minum.addfile(fn, 'c')
#Add dimensions
ncdims = []
for dim in dims:
ncdims.append(ncfile.adddim(dim.getShortName(), dim.getLength()))
#Add global attributes
ncfile.addgroupattr('Conventions', 'CF-1.6')
ncfile.addgroupattr('Tools', 'Created using MeteoInfo')
#Add dimension variables
dimvars = []
for dim,midim in zip(ncdims,dims):
dimtype = midim.getDimType()
dimname = dim.getShortName()
if dimtype == DimensionType.T:
var = ncfile.addvar(dimname, 'int', [dim])
var.addattr('units', 'hours since 1900-01-01 00:00:0.0')
var.addattr('long_name', 'Time')
var.addattr('standard_name', 'time')
var.addattr('axis', 'T')
tvar = var
elif dimtype == DimensionType.Z:
var = ncfile.addvar(dimname, 'float', [dim])
var.addattr('axis', 'Z')
elif dimtype == DimensionType.Y:
var = ncfile.addvar(dimname, 'float', [dim])
var.addattr('axis', 'Y')
elif dimtype == DimensionType.X:
var = ncfile.addvar(dimname, 'float', [dim])
var.addattr('axis', 'X')
else:
var = ncfile.addvar(dim.getShortName(), 'float', [dim])
var.addattr('axis', 'null')
dimvars.append(var)
#Add variable
var = ncfile.addvar(varname, data.datatype, ncdims)
if attrs is None:
var.addattr('name', varname)
else:
for key in attrs:
var.addattr(key, attr[key])
#Create netCDF file
ncfile.create()
#Write variable data
for dimvar, dim in zip(dimvars, dims):
if dim.getDimType() == DimensionType.T:
sst = datetime.datetime(1900,1,1)
tt = miutil.nums2dates(dim.getDimValue())
hours = []
for t in tt:
hours.append((t - sst).total_seconds() // 3600)
ncfile.write(dimvar, minum.array(hours))
else:
ncfile.write(dimvar, minum.array(dim.getDimValue()))
ncfile.write(var, data)
#Close netCDF file
ncfile.close()
