There is provided an electronic device, comprising: a receiving unit configured to receive location data generated by a navigation unit of a positioning system, and to receive performance data from a measuring unit, wherein performance parameters of the performance data are associated to corresponding route points included in the received location data; and a graphic generator configured to generate graphical data associated to the received location data. The graphic generator is further configured to generate graphical data associated to the performance parameters; and to adjust the spatial dimension of the generated graphical data associated to the performance parameters in proportion to the corresponding route points of the received location data on the basis of the values of the performance parameters.