def test_13(self):
"""
Interpolating Data
Interpolating data to/from known FSTD grids is made easy with the Ezscint package.
There are a few exceptions though
* you can only interpolate to a Y grid, not from it.
* multi-parts grids (Yin-Yang, ...) have to be dealth with in a special way (see below)
In this example we'll interpolate forecast data onto the analysis grid to make some computations
See also:
"""
import os
import rpnpy.librmn.all as rmn
ATM_MODEL_DFILES = os.getenv('ATM_MODEL_DFILES')
fileName0 = os.path.join(ATM_MODEL_DFILES.strip(), 'bcmk/2009042700_000') #Analysis
fileName1 = os.path.join(ATM_MODEL_DFILES.strip(), 'bcmk/2009042700_012') #Forecast
# Get data and grid definition for P0 in the 1st FSTD file
try:
fileId = rmn.fstopenall(fileName0, rmn.FST_RO)
p0Data1 = rmn.fstlir(fileId, nomvar='P0') # Get the record data and metadata along with partial grid info
p0Data1['iunit'] = fileId
p0GridId = rmn.ezqkdef(p0Data1) # use ezscint to retreive a grid id
p0Grid1 = rmn.decodeGrid(p0GridId) # Decode all the grid parameters values
rmn.fstcloseall(fileId)
except:
raise rmn.FSTDError("Problem getting P0 record grid meta from file: %s" % fileName0)
# Get data and grid definition for P0 in the 2nd FSTD file
try:
fileId = rmn.fstopenall(fileName1, rmn.FST_RO)
p0Data2 = rmn.fstlir(fileId, nomvar='P0', ip2=12) # Get the record data and metadata along with partial grid info
p0Data2['iunit'] = fileId
p0GridId = rmn.ezqkdef(p0Data2) # use ezscint to retreive a grid id
p0Grid2 = rmn.decodeGrid(p0GridId) # Decode all the grid parameters values
rmn.fstcloseall(fileId)
except:
raise rmn.FSTDError("Problem getting P0 record grid meta from file: %s " % fileName1)
# Make a cubic interpolation of p0Data2 onto p0Grid1 with extrapolated values set to Minvalue of the field
rmn.ezsetopt(rmn.EZ_OPT_EXTRAP_DEGREE, rmn.EZ_EXTRAP_MIN)
rmn.ezsetopt(rmn.EZ_OPT_INTERP_DEGREE, rmn.EZ_INTERP_LINEAR)
p0Data2_onGrid1 = rmn.ezsint(p0Grid1['id'], p0Grid2['id'], p0Data2['d'])
# Make some computation
p0Diff = p0Data2_onGrid1 - p0Data1['d']
def test_ezsint(self):
gp1 = self.getGridParams_L()
gid1 = rmn.ezqkdef(gp1)
self.assertTrue(gid1>=0)
gp2 = self.getGridParams_L(0.25)
gid2 = rmn.ezqkdef(gp2)
self.assertTrue(gid2>=0)
setid = rmn.ezdefset(gid2, gid1)
self.assertTrue(setid>=0)
zin = np.empty(gp1['shape'],dtype=np.float32,order='FORTRAN')
for x in xrange(gp1['ni']):
zin[:,x] = x
zout = rmn.ezsint(gid2,gid1,zin)
self.assertEqual(gp2['shape'],zout.shape)
for j in xrange(gp2['nj']):
for i in xrange(gp2['ni']):
self.assertTrue(abs((zin[i,j]+zin[i+1,j])/2.-zout[i,j]) < self.epsilon)
def test_ezsint(self):
gp1 = self.getGridParams_L()
gid1 = rmn.ezqkdef(gp1)
self.assertTrue(gid1>=0)
gp2 = self.getGridParams_L(0.25)
gid2 = rmn.ezqkdef(gp2)
self.assertTrue(gid2>=0)
setid = rmn.ezdefset(gid2, gid1)
self.assertTrue(setid>=0)
zin = np.empty(gp1['shape'],dtype=np.float32,order='FORTRAN')
for x in range(gp1['ni']):
zin[:,x] = x
zout = rmn.ezsint(gid2,gid1,zin)
self.assertEqual(gp2['shape'],zout.shape)
for j in range(gp2['nj']):
for i in range(gp2['ni']):
self.assertTrue(abs((zin[i,j]+zin[i+1,j])/2.-zout[i,j]) < self.epsilon)
def test_41qd(self):
import os, sys, datetime
import rpnpy.librmn.all as rmn
fdate = datetime.date.today().strftime('%Y%m%d') + '00_048'
CMCGRIDF = os.getenv('CMCGRIDF').strip()
fileNameOut = 'p0fstfileqd.fst'
fileIdIn = rmn.fstopenall(os.getenv('CMCGRIDF')+'/prog/regeta/'+fdate)
fileIdOut = rmn.fstopenall(fileNameOut, rmn.FST_RW)
gOut = rmn.defGrid_ZE(90, 45, 35., 250., 0.5, 0.5, 0., 180., 1., 270.)
r = rmn.fstlir(fileIdIn, nomvar='P0')
gIn = rmn.readGrid(fileIdIn, r)
rmn.ezsetopt(rmn.EZ_OPT_INTERP_DEGREE, rmn.EZ_INTERP_LINEAR)
d = rmn.ezsint(gOut, gIn, r)
r2 = r.copy()
r2.update(gOut)
r2.update({'etiket':'my_etk', 'd':d})
rmn.fstecr(fileIdOut, r2)
rmn.writeGrid(fileIdOut, gOut)
rmn.fstcloseall(fileIdIn)
rmn.fstcloseall(fileIdOut)
os.unlink(fileNameOut) # Remove test file
def ezinterp(arrayin, arrayin2,
src_nij, src_grtyp, src_refparam, src_xyAxis, src_hasAxis, src_ij0,
dst_nij, dst_grtyp, dst_refparam, dst_xyAxis, dst_hasAxis, dst_ij0,
isVect):
"""Interpolate from one grid to another
newArray = Fstdc.ezinterp(arrayin, arrayin2,
(niS, njS), grtypS, (grrefS, ig1S, ig2S, ig3S, ig4S), (xsS, ysS), hasSrcAxis, (i0S, j0S),
(niD, njD), grtypD, (grrefD, ig1D, ig2D, ig3D, ig4D), (xsD, ysD), hasDstAxis, (i0D, j0D),
isVect)
@param ...TODO...
@return interpolated data (numpy.ndarray)
@exception TypeError
@exception Fstdc.error
"""
try:
src_gid = _getGridHandle(src_nij[0], src_nij[1], src_grtyp,
src_refparam[0], src_refparam[1], src_refparam[2],
src_refparam[3], src_refparam[4],
src_ij0[0], src_ij0[1], src_xyAxis[0], src_xyAxis[1])
except:
raise error("ezgetlalo: Invalid Source Grid Desc")
try:
dst_gid = _getGridHandle(dst_nij[0], dst_nij[1], dst_grtyp,
dst_refparam[0], dst_refparam[1], dst_refparam[2],
dst_refparam[3], dst_refparam[4],
dst_ij0[0], dst_ij0[1], dst_xyAxis[0], dst_xyAxis[1])
except:
raise error("ezgetlalo: Invalid Source Grid Desc")
try:
gridsetid = _rmn.ezdefset(dst_gid, src_gid)
except:
raise error("Problem defining a grid interpolation set")
try:
if isVect:
dst_data = _rmn.ezuvint(dst_gid, src_gid, arrayin, arrayin2)
else:
dst_data = _rmn.ezsint(dst_gid, src_gid, arrayin)
return dst_data
except:
raise error("Interpolation problem in ezscint")
def ezinterp(arrayin, arrayin2,
src_nij, src_grtyp, src_refparam, src_xyAxis, src_hasAxis, src_ij0,
dst_nij, dst_grtyp, dst_refparam, dst_xyAxis, dst_hasAxis, dst_ij0,
isVect):
"""Interpolate from one grid to another
newArray = Fstdc.ezinterp(arrayin, arrayin2,
(niS, njS), grtypS, (grrefS, ig1S, ig2S, ig3S, ig4S), (xsS, ysS), hasSrcAxis, (i0S, j0S),
(niD, njD), grtypD, (grrefD, ig1D, ig2D, ig3D, ig4D), (xsD, ysD), hasDstAxis, (i0D, j0D),
isVect)
@param ...TODO...
@return interpolated data (numpy.ndarray)
@exception TypeError
@exception Fstdc.error
"""
try:
src_gid = _getGridHandle(src_nij[0], src_nij[1], src_grtyp,
src_refparam[0], src_refparam[1], src_refparam[2],
src_refparam[3], src_refparam[4],
src_ij0[0], src_ij0[1], src_xyAxis[0], src_xyAxis[1])
except:
raise error("ezgetlalo: Invalid Source Grid Desc")
try:
dst_gid = _getGridHandle(dst_nij[0], dst_nij[1], dst_grtyp,
dst_refparam[0], dst_refparam[1], dst_refparam[2],
dst_refparam[3], dst_refparam[4],
dst_ij0[0], dst_ij0[1], dst_xyAxis[0], dst_xyAxis[1])
except:
raise error("ezgetlalo: Invalid Source Grid Desc")
try:
gridsetid = _rmn.ezdefset(dst_gid, src_gid)
except:
raise error("Problem defining a grid interpolation set")
try:
if isVect:
dst_data = _rmn.ezuvint(dst_gid, src_gid, arrayin, arrayin2)
else:
dst_data = _rmn.ezsint(dst_gid, src_gid, arrayin)
return dst_data
except:
raise error("Interpolation problem in ezscint")
def test_41qd(self):
import os, sys, datetime
import rpnpy.librmn.all as rmn
fdate = datetime.date.today().strftime('%Y%m%d') + '00_048'
CMCGRIDF = os.getenv('CMCGRIDF').strip()
fileNameOut = 'p0fstfileqd.fst'
fileIdIn = rmn.fstopenall(
os.getenv('CMCGRIDF') + '/prog/regeta/' + fdate)
fileIdOut = rmn.fstopenall(fileNameOut, rmn.FST_RW)
gOut = rmn.defGrid_ZE(90, 45, 35., 250., 0.5, 0.5, 0., 180., 1., 270.)
r = rmn.fstlir(fileIdIn, nomvar='P0')
gIn = rmn.readGrid(fileIdIn, r)
rmn.ezsetopt(rmn.EZ_OPT_INTERP_DEGREE, rmn.EZ_INTERP_LINEAR)
d = rmn.ezsint(gOut, gIn, r)
r2 = r.copy()
r2.update(gOut)
r2.update({'etiket': 'my_etk', 'd': d})
rmn.fstecr(fileIdOut, r2)
rmn.writeGrid(fileIdOut, gOut)
rmn.fstcloseall(fileIdIn)
rmn.fstcloseall(fileIdOut)
os.unlink(fileNameOut) # Remove test file
def test_41(self):
"""
Horizontal Interpolation
See also:
"""
import os, sys, datetime
import rpnpy.librmn.all as rmn
fdate = datetime.date.today().strftime('%Y%m%d') + '00_048'
CMCGRIDF = os.getenv('CMCGRIDF').strip()
fileNameIn = os.path.join(CMCGRIDF, 'prog', 'regeta', fdate)
fileNameOut = 'p0fstfile.fst'
# Restrict to the minimum the number of messages printed by librmn
rmn.fstopt(rmn.FSTOP_MSGLVL, rmn.FSTOPI_MSG_CATAST)
try:
# Create Destination grid
# Note: Destination grid can also be read from a file
gp = {
'grtyp': 'Z',
'grref': 'E',
'ni': 90,
'nj': 45,
'lat0': 35.,
'lon0': 250.,
'dlat': 0.5,
'dlon': 0.5,
'xlat1': 0.,
'xlon1': 180.,
'xlat2': 1.,
'xlon2': 270.
}
gOut = rmn.encodeGrid(gp)
print("CB41: Defined a %s/%s grid of shape=%d, %d" %
(gOut['grtyp'], gOut['grref'], gOut['ni'], gOut['nj']))
except:
sys.stderr.write("Problem creating grid\n")
sys.exit(1)
# Open Files
try:
fileIdIn = rmn.fstopenall(fileNameIn)
fileIdOut = rmn.fstopenall(fileNameOut, rmn.FST_RW)
except:
sys.stderr.write("Problem opening the files: %s, %s\n" %
(fileNameIn, fileNameOut))
sys.exit(1)
try:
# Find and read record to interpolate with its grid
r = rmn.fstlir(fileIdIn, nomvar='P0')
gIn = rmn.readGrid(fileIdIn, r)
print("CB41: Read P0")
# Set interpolation options and interpolate
rmn.ezsetopt(rmn.EZ_OPT_INTERP_DEGREE, rmn.EZ_INTERP_LINEAR)
d = rmn.ezsint(gOut, gIn, r)
print("CB41: Interpolate P0")
# Create new record to write with interpolated data and
r2 = r.copy() # Preserve meta from original record
r2.update(gOut) # update grid information
r2.update({ # attach data and update specific meta
'etiket': 'my_etk',
'd': d
})
# Write record data + meta + grid to file
rmn.fstecr(fileIdOut, r2)
rmn.writeGrid(fileIdOut, gOut)
print("CB41: Wrote interpolated P0 and its grid")
except:
pass
finally:
# Properly close files even if an error occured above
# This is important when editing to avoid corrupted files
rmn.fstcloseall(fileIdIn)
rmn.fstcloseall(fileIdOut)
os.unlink(fileNameOut) # Remove test file
def test_13(self):
"""
Interpolating Data
Interpolating data to/from known FSTD grids is made easy with the Ezscint package.
There are a few exceptions though
* you can only interpolate to a Y grid, not from it.
* multi-parts grids (Yin-Yang, ...) have to be dealth with in a special way (see below)
In this example we'll interpolate forecast data onto the analysis grid to make some computations
See also:
"""
import os
import rpnpy.librmn.all as rmn
ATM_MODEL_DFILES = os.getenv('ATM_MODEL_DFILES')
fileName0 = os.path.join(ATM_MODEL_DFILES.strip(),
'bcmk/2009042700_000') #Analysis
fileName1 = os.path.join(ATM_MODEL_DFILES.strip(),
'bcmk/2009042700_012') #Forecast
# Get data and grid definition for P0 in the 1st FSTD file
try:
fileId = rmn.fstopenall(fileName0, rmn.FST_RO)
p0Data1 = rmn.fstlir(
fileId, nomvar='P0'
) # Get the record data and metadata along with partial grid info
p0Data1['iunit'] = fileId
p0GridId = rmn.ezqkdef(
p0Data1) # use ezscint to retreive a grid id
p0Grid1 = rmn.decodeGrid(
p0GridId) # Decode all the grid parameters values
rmn.fstcloseall(fileId)
except:
raise rmn.FSTDError(
"Problem getting P0 record grid meta from file: %s" %
fileName0)
# Get data and grid definition for P0 in the 2nd FSTD file
try:
fileId = rmn.fstopenall(fileName1, rmn.FST_RO)
p0Data2 = rmn.fstlir(
fileId, nomvar='P0', ip2=12
) # Get the record data and metadata along with partial grid info
p0Data2['iunit'] = fileId
p0GridId = rmn.ezqkdef(
p0Data2) # use ezscint to retreive a grid id
p0Grid2 = rmn.decodeGrid(
p0GridId) # Decode all the grid parameters values
rmn.fstcloseall(fileId)
except:
raise rmn.FSTDError(
"Problem getting P0 record grid meta from file: %s " %
fileName1)
# Make a cubic interpolation of p0Data2 onto p0Grid1 with extrapolated values set to Minvalue of the field
rmn.ezsetopt(rmn.EZ_OPT_EXTRAP_DEGREE, rmn.EZ_EXTRAP_MIN)
rmn.ezsetopt(rmn.EZ_OPT_INTERP_DEGREE, rmn.EZ_INTERP_LINEAR)
p0Data2_onGrid1 = rmn.ezsint(p0Grid1['id'], p0Grid2['id'],
p0Data2['d'])
# Make some computation
p0Diff = p0Data2_onGrid1 - p0Data1['d']
def test_41(self):
"""
Horizontal Interpolation
See also:
"""
import os, sys, datetime
import rpnpy.librmn.all as rmn
fdate = datetime.date.today().strftime('%Y%m%d') + '00_048'
CMCGRIDF = os.getenv('CMCGRIDF').strip()
fileNameIn = os.path.join(CMCGRIDF, 'prog', 'regeta', fdate)
fileNameOut = 'p0fstfile.fst'
# Restric to the minimum the number of messages printed by librmn
rmn.fstopt(rmn.FSTOP_MSGLVL,rmn.FSTOPI_MSG_CATAST)
try:
# Create Destination grid
# Note: Destination grid can also be read from a file
gp = {
'grtyp' : 'Z',
'grref' : 'E',
'ni' : 90,
'nj' : 45,
'lat0' : 35.,
'lon0' : 250.,
'dlat' : 0.5,
'dlon' : 0.5,
'xlat1' : 0.,
'xlon1' : 180.,
'xlat2' : 1.,
'xlon2' : 270.
}
gOut = rmn.encodeGrid(gp)
print("CB41: Defined a %s/%s grid of shape=%d, %d" %
(gOut['grtyp'], gOut['grref'], gOut['ni'], gOut['nj']))
except:
sys.stderr.write("Problem creating grid\n")
sys.exit(1)
# Open Files
try:
fileIdIn = rmn.fstopenall(fileNameIn)
fileIdOut = rmn.fstopenall(fileNameOut, rmn.FST_RW)
except:
sys.stderr.write("Problem opening the files: %s, %s\n" % (fileNameIn, fileNameOut))
sys.exit(1)
try:
# Find and read record to interpolate with its grid
r = rmn.fstlir(fileIdIn, nomvar='P0')
gIn = rmn.readGrid(fileIdIn, r)
print("CB41: Read P0")
# Set interpolation options and interpolate
rmn.ezsetopt(rmn.EZ_OPT_INTERP_DEGREE, rmn.EZ_INTERP_LINEAR)
d = rmn.ezsint(gOut, gIn, r)
print("CB41: Interpolate P0")
# Create new record to write with interpolated data and
r2 = r.copy() # Preserve meta from original record
r2.update(gOut) # update grid information
r2.update({ # attach data and update specific meta
'etiket': 'my_etk',
'd' : d
})
# Write record data + meta + grid to file
rmn.fstecr(fileIdOut, r2)
rmn.writeGrid(fileIdOut, gOut)
print("CB41: Wrote interpolated P0 and its grid")
except:
pass
finally:
# Properly close files even if an error occured above
# This is important when editing to avoid corrupted files
rmn.fstcloseall(fileIdIn)
rmn.fstcloseall(fileIdOut)
os.unlink(fileNameOut) # Remove test file
