Let:
$L = 31m. \times 60 = 1860m.$
$W = 30m. \times 60 = 1800m.$
\[ A = L \times W \] \[ A = 1860m. \times 1800m. \] \[ A = 3348000sqm. \] \[ A = 334.80ha. \] $\therefore$ the area of each cadastral map is $3348000sqm.$ or $334.80ha.$
$L = 31m. \times 60 = 1860m.$
$W = 30m. \times 60 = 1800m.$
\[ A = L \times W \] \[ A = 1860m. \times 1800m. \] \[ A = 3348000sqm. \] \[ A = 334.80ha. \] $\therefore$ the area of each cadastral map is $3348000sqm.$ or $334.80ha.$