Drive assist system, method, and program

A drive assist method for displaying, on a display, an image in which a destination location icon that indicates a destination location is superimposed on a scene in front of a mobile body, comprising:

• acquiring a length of a frontage of the destination location along a road on which the mobile body is present;
• acquiring a maximum error, which is a maximum value of an error between an estimated position of the mobile body and an actual position of the mobile body that may be caused in a direction of the road on which the mobile body is present;
• and
• specifying the display position of the destination location icon on the basis of the estimated position of the mobile body such that:
• the display position of the destination location icon is a position within the frontage when the error is zero;
• and
• the display position of the destination location icon is a position within the frontage or a position nearer than the destination location when the error is the maximum error;
• and
• displaying, on the display, an image in which the destination location icon is superimposed on the display position of the destination location icon in the scene in front of the mobile body.

A computer-readable storage medium storing a computer-executable drive assist program for displaying, on a display, an image in which a destination location icon that indicates a destination location is superimposed on a scene in front of a mobile body, the program comprising:

• instructions for acquiring a length of a frontage of the destination location along a road on which the mobile body is present;
• instructions for acquiring a maximum error, which is a maximum value of an error between an estimated position of the mobile body and an actual position of the mobile body that may be caused in a direction of the road on which the mobile body is present;
• and
• instructions for specifying the display position of the destination location icon on the basis of the estimated position of the mobile body such that:
• the display position of the destination location icon is a position within the frontage when the error is zero;
• and
• the display position of the destination location icon is a position within the frontage or a position nearer than the destination location when the error is the maximum error;
• and
• instructions for displaying, on the display, an image in which the destination location icon is superimposed on the display position of the destination location icon in the scene in front of the mobile body.