This icon combines scalar fields for the purpose of plotting as a vector pair. The user supplies GRIB data of vector X and Y components (cartesian coordinates) or intensity/direction (polar coordinates) with the option of colouring the vectorial representation (arrows) according to the magnitude of a user supplied scalar quantity. The classic example is to plot a wind field from (U,V) components coloured according to Temperature. In order to apply a colour map, the Wind Plotting icon must be dropped into the plot.
The macro language equivalent is grib_vectors().
For an example, see Coloured Vectors Example.
The Grib Vectors Editor
Type
This parameter specifies whether the input data fields are in U/V format (Vector Field) or intensity/direction (Polar Field).
U Component
Specifies the field to be used as the vector field U component. The parameter accepts any GRIB icon as input. Available when Type is Vector Field.
V Component
Specifies the field to be used as the vector field V component. The parameter accepts any GRIB icon as input. Available when Type is Vector Field.
Intensity
Specifies the field to be used as the vector field intensity component. The parameter accepts any GRIB icon as input. Available when Type is Polar Field.
Direction
Specifies the field to be used as the vector field direction component. The parameter accepts any GRIB icon as input. Available when Type is Polar Field.
Colouring Field
Specifies the field to be used as the colouring key. If not supplied, the computed magnitude of the vector components will be used for colouring. The parameter accepts any GRIB icon as input.