def test_lons(self):
self.assertEqual(qc.mds_lon_to_xindex(-180.0), 0)
self.assertEqual(qc.mds_lon_to_xindex(-179.0), 0)
self.assertEqual(qc.mds_lon_to_xindex(-178.0), 1)
self.assertEqual(qc.mds_lon_to_xindex(180.0), 359)
self.assertEqual(qc.mds_lon_to_xindex(179.0), 359)
self.assertEqual(qc.mds_lon_to_xindex(178.0), 358)
self.assertEqual(qc.mds_lon_to_xindex(-1.0), 178)
self.assertEqual(qc.mds_lon_to_xindex(0.0), 179)
self.assertEqual(qc.mds_lon_to_xindex(1.0), 181)
def get_value_ostia(self, lat, lon):
"""
:param lat: latitude of location to extract value from in degrees of arc
:param lon: longitude of location to extract value from in degrees of arc
:return: SST at that location or None
:type lat: float
:type lon: float
:rtype: float
"""
yindex = qc.mds_lat_to_yindex(lat, res=0.05)
xindex = qc.mds_lon_to_xindex(lon, res=0.05)
tindex = 0
result = self.field[tindex, yindex, xindex]
if type(result) is np.float64 or type(result) is np.float32:
pass
else:
if result.mask:
result = None
else:
result = result.data[0]
return result
def test_lons_with_res(self):
self.assertEqual(qc.mds_lon_to_xindex(-180.0, 5.0), 0)
self.assertEqual(qc.mds_lon_to_xindex(-178.0, 5.0), 0)
self.assertEqual(qc.mds_lon_to_xindex(-175.0, 5.0), 0)
self.assertEqual(qc.mds_lon_to_xindex(175.0, 5.0), 71)
self.assertEqual(qc.mds_lon_to_xindex(178.4, 5.0), 71)
self.assertEqual(qc.mds_lon_to_xindex(180.0, 5.0), 71)
self.assertEqual(qc.mds_lon_to_xindex(0.0, 5.0), 35)
def get_value_ostia(self, lat, lon):
yindex = qc.mds_lat_to_yindex(lat, res=0.05)
xindex = qc.mds_lon_to_xindex(lon, res=0.05)
tindex = 0
result = self.field[tindex, yindex, xindex]
if type(result) is np.float64 or type(result) is np.float32:
pass
else:
if result.mask:
result = None
else:
result = result.data[0]
return result
def get_value_mds_style(self, lat, lon, month, day):
'''
Get the value from the climatology at the give position and time using the MDS
method for deciding which grid cell borderline cases fall into
:param lat: latitude of location to extract value from in degrees
:param lon: longitude of location to extract value from in degrees
:param month: month for which the value is required
:param day: day for which the value is required
:type lat: float
:type lon: float
:type month: integer
:type day: integer
:return: climatology value at specified location and time.
:rtype: float
'''
if month < 1 or month > 12:
return None
ml = qc.month_lengths(2004)
if day < 1 or day > ml[month - 1]:
return None
yindex = qc.mds_lat_to_yindex(lat)
xindex = qc.mds_lon_to_xindex(lon)
tindex = self.get_tindex(month, day)
result = self.field[tindex, yindex, xindex]
if type(result) is np.float64 or type(result) is np.float32:
pass
else:
if result.mask:
result = None
else:
result = result.data[0]
return result