You will need multiple sheets of A4 or one A1 to print this big game board. For A4 pages, look in the print window of the PDF viewer and there should be an option to print tiled pages.
You can glue the print on hard cardboard or MDF and protect it with self-adhesive clear covering film or a few layers of varnish. Water-soluble markers like the Staedtler Lumocolor are ideal for drawing the urban areas and forests on the map. The ink is easily removed with water.