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

Returns

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

add_station_lat_lon

GempakSounding