1. A computer-implemented method for determining a coverage region of a radar device, the computer-implemented method comprising: generating, by a radar device mounted on a machine, radar data including radar data points representing objects detected by the radar device; generating, by a lidar device mounted on the machine, lidar data including lidar data points representing objects detected by the lidar device; calculating a distance between each one of the radar data points and a corresponding one of the lidar data points; determining an accuracy value for each one of a plurality of sub-regions based on the calculated distances of the radar data points in the sub-region; determining, by the one or more processors, a radar coverage region for the radar device, the radar coverage region including a group of sub-regions with accuracy values within a predetermined range; and generating, by the one or more processors, data used to display a graphical representation of the radar coverage region.