opendrift.readers.reader_grib2

Attributes

logger

Classes

Reader

A structured reader. Data is gridded on a regular grid. Used by e.g.:

Module Contents

opendrift.readers.reader_grib2.logger

class opendrift.readers.reader_grib2.Reader(filename, proj4=None, engine='cfgrib')

Bases: opendrift.readers.basereader.structured.StructuredReader

A structured reader. Data is gridded on a regular grid. Used by e.g.: opendrift.readers.reader_netCDF_CF_generic.Reader.

Attributes:

projected: is True if fakeproj.fakeproj is used because of missing projection information. The data points are assumed to be approximately equidistant on the surface (i.e. in meters).

clipped: pixels to to remove along boundary (e.g. in case of bad data).

See also

opendrift.readers

Grib file reader

Args:

filename: path to grib or grib2 file.

proj4: Optional projection override.

engine: grib engine used by xarray, default is cfgrib.

Returns: Grib-file reader.

dataset = None

variables = None

name

times

Setting this to True overrides temporal and spatial bounds checks. Also useful for readers that are constant and do not have a temporal dimension.

start_time

end_time

proj4 = None

variable_mapping

lon

lat

get_variables(requested_variables, time=None, x=None, y=None, z=None)

Obtain a _block_ of values of the requested variables at all positions (x, y, z) closest to given time. These will be stored in opendrift.readers.interpolation.structured.ReaderBlock and accessed from there.

Arguments:

variables: list of variables.

time: datetime or None, time at which data are requested.

x, y: float or ndarrays; coordinates of requested points.

z: float or ndarray; vertical position (in meters, positive up)

Returns:

Dictionary

keywords: variables (string) values: 2D ndarray bounding x and y.