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Class for accessing data in a GRIB Edition 2 message.
The Grib2Decode function returns a list of these class instances, one for each grib message in the file.
When a class instance is created, metadata in the GRIB2 file is decoded and used to set various instance variables.
Instance Methods | |||
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Instance Variables | |
angle_of_pole_rotation The angle of rotation in degrees about the new polar axis (measured clockwise when looking from the southern to the northern pole) of the coordinate system. |
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bitmap_indicator_flag flag to indicate whether a bit-map is used (0 for yes, 255 for no). |
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center_wmo_code 4 character wmo code for originating center. |
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data_representation_template data representation template from section 5. |
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data_representation_template_number data representation template number from section 5 (Table 5.0) |
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discipline_code product discipline code for grib message (Table 0.0). |
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earthRmajor major (equatorial) earth radius. |
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earthRminor minor (polar) earth radius. |
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grid_definition_info grid definition section information from section 3. |
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grid_definition_template grid definition template from section 3. |
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grid_definition_template_number grid definition template number from section 3 (Table 3.1). |
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gridlength_in_x_direction x (or longitudinal) direction grid length. |
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gridlength_in_y_direction y (or latitudinal) direction grid length. |
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has_local_use_section True if grib message contains a local use section. |
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identification_section data from identification section (section 1). |
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latitude_first_gridpoint latitude of first grid point on grid. |
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latitude_last_gridpoint latitude of last grid point on grid. |
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latitude_of_southern_pole the geographic latitude in degrees of the southern pole of the coordinate system (for rotated lat/lon or gaussian grids). |
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longitude_first_gridpoint longitude of first grid point on grid. |
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longitude_last_gridpoint longitude of last grid point on grid. |
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longitude_of_southern_pole the geographic longitude in degrees of the southern pole of the coordinate system (for rotated lat/lon or gaussian grids). |
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missing_value primary missing value (for data_representation_template_numbers 2 and 3). |
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missing_value2 secondary missing value (for data_representation_template_numbers 2 and 3). |
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number_of_data_points_to_unpack total number of data points in grib message. |
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originating_center name of national/international originating center. |
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points_in_x_direction number of points in the x (longitudinal) direction. |
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points_in_y_direction number of points in the y (latitudinal) direction. |
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product_definition_template product definition template from section 4. |
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product_definition_template_number product definition template number from section 4 (Table 4.0). |
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proj4_ instance variables with this prefix are used to set the map projection parameters for PROJ.4. |
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scanmodeflags scanning mode flags from Table 3.4 (Table 3.4). |
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shape_of_earth string describing the shape of the earth (e.g. |
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spectral_truncation_parameters pentagonal truncation parameters that describe the spherical harmonic truncation (only relevant for grid_definition_template_numbers 50-52). |
Properties | |
values returns an unpacked data grid. |
Method Details |
create a Grib2Decode class instance given a GRIB Edition 2 filename. (used by Grib2Decode function - not directly called by user) |
returns an unpacked data grid. Can also be accomplished with values property.
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return lats,lons (in degrees) of grid. currently can handle reg. lat/lon, global gaussian, mercator, stereographic, lambert conformal, albers equal-area, space-view and azimuthal equidistant grids. latlons method does the same thing.
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Instance Variable Details |
angle_of_pole_rotationThe angle of rotation in degrees about the new polar axis (measured clockwise when looking from the southern to the northern pole) of the coordinate system. For rotated lat/lon or gaussian grids. |
grid_definition_infogrid definition section information from section 3. See Grib2Encode.addgrid for details. |
has_local_use_sectionTrue if grib message contains a local use section. If True the actual local use section is contained in the_local_use_section
instance variable, as a raw byte string.
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identification_sectiondata from identification section (section 1). See Grib2Encode.__init__ for details. |
scanmodeflagsscanning mode flags from Table 3.4 (Table 3.4).
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shape_of_earthstring describing the shape of the earth (e.g. 'Oblate Spheroid', 'Spheroid'). |
spectral_truncation_parameterspentagonal truncation parameters that describe the spherical harmonic truncation (only relevant for grid_definition_template_numbers 50-52). For triangular truncation, all three of these numbers are the same. |
Property Details |
valuesreturns an unpacked data grid. Can also be accomplished with values property.
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