pysteps.visualization.utils.get_geogrid¶

pysteps.visualization.utils.get_geogrid(nlat, nlon, geodata=None)¶

Get the geogrid data. If geodata is None, a regular grid is returned. In this case, it is assumed that the origin of the 2D input data is the upper left corner (“upper”).

Parameters

nlat: int

Number of grid points along the latitude axis

nlon: int

Number of grid points along the longitude axis

geodata:

geodata: dictionary or None Optional dictionary containing geographical information about the field.

If geodata is not None, it must contain the following key-value pairs:

Key	Value
projection	PROJ.4-compatible projection definition
x1	x-coordinate of the lower-left corner of the data raster
y1	y-coordinate of the lower-left corner of the data raster
x2	x-coordinate of the upper-right corner of the data raster
y2	y-coordinate of the upper-right corner of the data raster
yorigin	a string specifying the location of the first element in the data raster w.r.t. y-axis: ‘upper’ = upper border, ‘lower’ = lower border

Returns

x_grid: 2D array: X grid with dimensions of (nlat, nlon) with the same y-origin as the one specified in the geodata (or “upper” if geodata is None).
y_grid: 2D array: Y grid with dimensions of (nlat, nlon) with the same y-origin as the one specified in the geodata (or “upper” if geodata is None).
extent: tuple: Four-element tuple specifying the extent of the domain according to (lower left x, upper right x, lower left y, upper right y).
regular_grid: bool: True is the grid is regular. False otherwise.
origin: str: Place the [0, 0] index of the array to plot in the upper left or lower left corner of the axes.