Table 3.

Error index defined in Eq. (1), after Carrara et al.³⁷, Alvioli et al.³⁸ and Fiorucci et al.¹⁰, calculated for the four polygon-based inventories in the overlap region. A smaller error index denotes better spatial agreement between the corresponding pair of inventories.

	Inventory A	Inventory B	Inventory C
Inventory B	0.8	–	0.73
Inventory C	0.87	0.73	–
Inventory E	0.9	0.85	0.86