Abstract: A boundary line visualization system having a terminal includes an image acquisition unit configured to acquire an image including a prescribed location, a terminal state acquisition unit configured to acquire a state of the terminal including coordinates and an attitude of the terminal, a boundary line generation unit configured to generate a computer graphics (CG) image based on coordinates of a boundary line present within a certain range from the terminal on the basis of the state of the terminal acquired by the terminal state acquisition unit, and a composite image generation unit configured to generate a composite image in which the CG image of the boundary line is superimposed on the image on the basis of the coordinates indicating the boundary line and the coordinates indicating the prescribed location included in the image acquired by the image acquisition unit.