| 摘要 |
<p>A tile (10) has a tile base portion (12); a rectangular two-dimensional code pattern (14), where information such as at least positional information indicating a place where the tile (10) is installed is two-dimensionally coded, provided on the surface side of the tile base portion (12); and signs (20) arranged around the two-dimensional code pattern (14) on the surface (12a) side of the tile base portion (12), the signs (20) being along each side of the two-dimensional pattern (14).</p> |
