DISPLAY CONTROL DEVICE, DISPLAY CONTROL METHOD, AND DISPLAY CONTROL PROGRAM

A display control device includes: a circle setting unit that sets a reference circle that serves as the reference for a scale mark layout; a scale mark position determining unit that determines the position of a scale mark on the reference circle; a rectangle setting unit that sets a number display rectangle of the size corresponding to the number of digits of the indication number indicating the value corresponding to the scale mark; a rectangle position determining unit that determines the layout position of the number display rectangle from the position of the scale mark, using a calculating formula that has been set on the basis of the size of the reference circle and the size of the number display rectangle; and a number display unit that displays a number in the number display rectangle, and the calculating formula is designed so that, in a case where a straight line extending through the center of the reference circle on a display screen is set as a symmetrical axis, number display rectangles for displaying indication numbers indicating the values corresponding to scale marks disposed at positions symmetrical to each other are located at the same position as viewed from the direction of the symmetrical axis, and each number display rectangle is located at a layout position inscribed in the reference circle.