GempakGrid¶

class metpy.io.GempakGrid(file, *args, **kwargs)¶

Subclass of GempakFile specific to GEMPAK gridded data.

Instantiate GempakFile object from file.

Attributes Summary

Methods Summary

`__init__`(file, args, *kwargs)	Instantiate GempakFile object from file.
`gdinfo`()	Return grid information.
`gdxarray`([parameter, date_time, coordinate, ...])	Select grids and output as list of xarray DataArrays.

Attributes Documentation

data_management_fmt = [('next_free_word', 'i'), ('max_free_pairs', 'i'), ('actual_free_pairs', 'i'), ('last_word', 'i'), ('free_word1', 'i'), ('free_word2', 'i'), ('free_word3', 'i'), ('free_word4', 'i'), ('free_word5', 'i'), ('free_word6', 'i'), ('free_word7', 'i'), ('free_word8', 'i'), ('free_word9', 'i'), ('free_word10', 'i'), ('free_word11', 'i'), ('free_word12', 'i'), ('free_word13', 'i'), ('free_word14', 'i'), ('free_word15', 'i'), ('free_word16', 'i'), ('free_word17', 'i'), ('free_word18', 'i'), ('free_word19', 'i'), ('free_word20', 'i'), ('free_word21', 'i'), ('free_word22', 'i'), ('free_word23', 'i'), ('free_word24', 'i'), ('free_word25', 'i'), ('free_word26', 'i'), ('free_word27', 'i'), ('free_word28', 'i')]¶

grid_anl_fmt1 = [('analysis_type', 'f'), ('delta_n', 'f'), ('delta_x', 'f'), ('delta_y', 'f'), (None, '4x'), ('garea_llcr_lat', 'f'), ('garea_llcr_lon', 'f'), ('garea_urcr_lat', 'f'), ('garea_urcr_lon', 'f'), ('extarea_llcr_lat', 'f'), ('extarea_llcr_lon', 'f'), ('extarea_urcr_lat', 'f'), ('extarea_urcr_lon', 'f'), ('datarea_llcr_lat', 'f'), ('datarea_llcr_lon', 'f'), ('datarea_urcr_lat', 'f'), ('datarea_urcrn_lon', 'f'), (None, '444x')]¶

grid_anl_fmt2 = [('analysis_type', 'f'), ('delta_n', 'f'), ('grid_ext_left', 'f'), ('grid_ext_down', 'f'), ('grid_ext_right', 'f'), ('grid_ext_up', 'f'), ('garea_llcr_lat', 'f'), ('garea_llcr_lon', 'f'), ('garea_urcr_lat', 'f'), ('garea_urcr_lon', 'f'), ('extarea_llcr_lat', 'f'), ('extarea_llcr_lon', 'f'), ('extarea_urcr_lat', 'f'), ('extarea_urcr_lon', 'f'), ('datarea_llcr_lat', 'f'), ('datarea_llcr_lon', 'f'), ('datarea_urcr_lat', 'f'), ('datarea_urcrn_lon', 'f'), (None, '440x')]¶

grid_nav_fmt = [('grid_definition_type', 'f'), ('projection', '3sx', <method 'decode' of 'bytes' objects>), ('left_grid_number', 'f'), ('bottom_grid_number', 'f'), ('right_grid_number', 'f'), ('top_grid_number', 'f'), ('lower_left_lat', 'f'), ('lower_left_lon', 'f'), ('upper_right_lat', 'f'), ('upper_right_lon', 'f'), ('proj_angle1', 'f'), ('proj_angle2', 'f'), ('proj_angle3', 'f'), (None, '972x')]¶

prod_desc_fmt = [('version', 'i'), ('file_headers', 'i'), ('file_keys_ptr', 'i'), ('rows', 'i'), ('row_keys', 'i'), ('row_keys_ptr', 'i'), ('row_headers_ptr', 'i'), ('columns', 'i'), ('column_keys', 'i'), ('column_keys_ptr', 'i'), ('column_headers_ptr', 'i'), ('parts', 'i'), ('parts_ptr', 'i'), ('data_mgmt_ptr', 'i'), ('data_mgmt_length', 'i'), ('data_block_ptr', 'i'), ('file_type', 'i', <enum 'FileTypes'>), ('data_source', 'i', <function _data_source>), ('machine_type', 'i'), ('missing_int', 'i'), (None, '12x'), ('missing_float', 'f')]¶

Methods Documentation

__init__(file, *args, **kwargs)[source]¶: Instantiate GempakFile object from file.

gdxarray(parameter=None, date_time=None, coordinate=None, level=None, date_time2=None, level2=None)[source]¶

Select grids and output as list of xarray DataArrays.

Subset the data by parameter values. The default is to not subset and return the entire dataset.

Parameters

parameter (str or array-like of str) – Name of GEMPAK parameter.
date_time (datetime or array-like of datetime) – Valid datetime of the grid. Alternatively can be a string with the format YYYYmmddHHMM.
coordinate (str or array-like of str) – Vertical coordinate.
level (float or array-like of float) – Vertical level.
date_time2 (datetime or array-like of datetime) – Secondary valid datetime of the grid. Alternatively can be a string with the format YYYYmmddHHMM.
level2 (float or array_like of float) – Secondary vertical level. Typically used for layers.

Returns

list – List of xarray.DataArray objects for each grid.

set_module

GempakSounding