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wip #8

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24 changes: 23 additions & 1 deletion lib/iris/fileformats/nimrod.py
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Original file line number Diff line number Diff line change
Expand Up @@ -251,8 +251,8 @@ def to_cube(self):
if self.tm_meridian_scaling != MISSING_INT:
raise TranslationError("tm_meridian_scaling not yet handled")

# "NG" (British National Grid).
if self.horizontal_grid_type == 0:
# "NG", means osgb grid.
osgb_cs = iris.coord_systems.OSGB()
cube.add_dim_coord(
DimCoord(numpy.arange(self.num_cols) * self.column_step + self.x_origin,
Expand All @@ -263,6 +263,21 @@ def to_cube(self):
long_name="y", units="m", coord_system=osgb_cs), 0)
else:
raise TranslationError("Corner {0} not yet implemented".format(self.origin_corner))

# Latlon
elif self.horizontal_grid_type == 1:
# latlon
from iris.analysis.cartography import DEFAULT_SPHERICAL_EARTH_RADIUS
ll_cs = iris.coord_systems.GeogCS(DEFAULT_SPHERICAL_EARTH_RADIUS)
cube.add_dim_coord(
DimCoord(numpy.arange(self.num_cols) * self.column_step + self.x_origin,
standard_name="longitude", units="degrees", coord_system=ll_cs), 1)
if self.origin_corner == 0: # top left
cube.add_dim_coord(
DimCoord(numpy.arange(self.num_rows)[::-1] * -self.row_step + self.y_origin,
standard_name="latitude", units="degrees", coord_system=ll_cs), 0)
else:
raise TranslationError("Corner {0} not yet implemented".format(self.origin_corner))
else:
raise TranslationError("Grid type %d not yet implemented" %
self.horizontal_grid_type)
Expand All @@ -276,6 +291,13 @@ def to_cube(self):
standard_name="height", units="m"))
else:
raise TranslationError("Bounded vertical not yet implemented")
elif self.vertical_coord_type == 1:
if (self.reference_vertical_coord_type == MISSING_INT or
self.reference_vertical_coord == MISSING_FLOAT):
cube.add_aux_coord(DimCoord(self.vertical_coord,
standard_name="altitude", units="m"))
else:
raise TranslationError("Bounded vertical not yet implemented")
else:
raise TranslationError("Vertical coord type %d currently unhanded" %
self.vertical_coord_type)
Expand Down
39 changes: 39 additions & 0 deletions lib/iris/tests/results/nimrod/korean.cml
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Original file line number Diff line number Diff line change
@@ -0,0 +1,39 @@
<?xml version="1.0" ?>
<cubes xmlns="urn:x-iris:cubeml-0.2">
<cube long_name="orography" units="m">
<attributes>
<attribute name="field_code" value="73"/>
<attribute name="nimrod_version" value="2"/>
<attribute name="num_model_levels" value="1"/>
<attribute name="source" value="umqg"/>
</attributes>
<coords>
<coord>
<DimCoord id="641851dc8003dd28" points="[9999.0]" shape="(1,)" standard_name="altitude" units="Unit('m')" value_type="float32"/>
</coord>
<coord>
<DimCoord id="5634c91ba5717382" long_name="experiment_number" points="[0]" shape="(1,)" units="Unit('1')" value_type="int16"/>
</coord>
<coord>
<DimCoord id="49db77bb88e9d046" points="[375288.0]" shape="(1,)" standard_name="forecast_reference_time" units="Unit('hours')" value_type="float64"/>
</coord>
<coord datadims="[0]">
<DimCoord id="31a3be9e9cebe09a" long_name="latitude" points="[32.0166660938, 32.0333327614, 32.0499994289,
..., 42.9666666649, 42.9833333325, 43.0]" shape="(660,)" units="Unit('degrees')" value_type="float64">
<geogCS earth_radius="6367470.0"/>
</DimCoord>
</coord>
<coord datadims="[1]">
<DimCoord id="31a3be9e9cebe09a" long_name="longitude" points="[124.0, 124.016666668, 124.033333335, ...,
131.950000415, 131.966667082, 131.98333375]" shape="(480,)" units="Unit('degrees')" value_type="float64">
<geogCS earth_radius="6367470.0"/>
</DimCoord>
</coord>
<coord>
<DimCoord id="7655d345fead4375" points="[375288.0]" shape="(1,)" standard_name="time" units="Unit('hours')" value_type="float64"/>
</coord>
</coords>
<cellMethods/>
<data checksum="0x4f48c140" dtype="int16" shape="(660, 480)"/>
</cube>
</cubes>
24 changes: 17 additions & 7 deletions lib/iris/tests/test_nimrod.py
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Original file line number Diff line number Diff line change
Expand Up @@ -21,22 +21,32 @@

import matplotlib.pyplot as plt
import numpy as np
import cartopy.crs as ccrs

import iris
import iris.plot as iplt
import iris.quickplot as qplt


@iris.tests.skip_data
class TestGribLoad(tests.GraphicsTest):
class TestLoad(tests.GraphicsTest):

def test_load(self):
cube = iris.load(tests.get_data_path(('NIMROD', 'uk2km', 'WO0000000003452',
'201007020900_u1096_ng_ey00_visibility0180_screen_2km')))[0]
self.assertCML(cube, ("nimrod", "load.cml"))
# def test_load(self):
# cube = iris.load(tests.get_data_path(('NIMROD', 'uk2km', 'WO0000000003452',
# '201007020900_u1096_ng_ey00_visibility0180_screen_2km')))[0]
# self.assertCML(cube, ("nimrod", "load.cml"))
#
# c = plt.contourf(cube.data, levels=np.linspace(-25000, 6000, 10))
# self.check_graphic()

c = plt.contourf(cube.data, levels=np.linspace(-25000, 6000, 10))
self.check_graphic()
def test_korean(self):
# cubes = iris.load(tests.get_data_path(('NIMROD', 'Korea', '201210240000_k0880_ll_umqg_height0000_orography_2km')))
cube = iris.load_cube('/data/local/dataZoo/NIMROD/Korea/201210240000_k0880_ll_umqg_height0000_orography_2km')
self.assertCML(cube, ("nimrod", "korean.cml"))

qplt.contourf(cube)
plt.gcs().coastlines()
self.check_graphic()

if __name__ == "__main__":
tests.main()