To perform divided map printing in a mode easy to handle.

A layout drawing (a) and partial maps (b), (c), (d), (e) dividing a map are printed on one sheet. The layout drawing indicates a print layout of the map on a plurality of sheets, in which the ranges of the partial maps printed in print areas of the sheets are indicated as rectangles on the map within a print map range together with serial numbers 51 imparted to print areas. On each of sheets with the partial maps printed in the print areas, the serial number imparted to the print area and a standard line 53 are printed on the layout drawing so as to immediately grasp the arrangement of linking the sheets. The standard line 53 is arranged to accurately recover each of entire maps by overlapping the standard lines to link the adjacent sheets.