In a method for visualization of three-dimensional vectorial quantities at a data processing device with color-coded direction information, the vectorial quantities are displayed dependent on their direction, in different colors in a three-dimensionally or two-dimensionally projected representation on an image output unit, and at least one reference element indicating the orientation of the representation and at least one explanatory specification regarding the employed color coding are shown on the image output unit. The at least one reference element specifies the orientation of the representation is designed in color as a three-dimensional element such that the color coding used is shown clarified by the color design of the reference element.
