$$TE = \sum \limits_{k = 1}^{m} e_{ik}$$
where \(e_{ik}\) is the edge lengths in meters.
TE is an 'Area and edge metric'. Total edge includes all edges. It measures the
configuration of the landscape because a highly fragmented landscape will have many
edges. However, total edge is an absolute measure, making comparisons among landscapes
with different total areas difficult. If count_boundary = TRUE also edges to the
landscape boundary are included.
Behaviour
Equals TE = 0 if all cells are edge cells. Increases, without limit,
as landscape becomes more fragmented