Total (class) edge (Area and Edge metric)
lsm_c_te(landscape, count_boundary = FALSE, directions = 8)tibble
Raster* Layer, Stack, Brick, SpatRaster (terra), stars, or a list of rasterLayers.
Include landscape boundary in edge length
The number of directions in which patches should be connected: 4 (rook's case) or 8 (queen's case).
$$TE = \sum \limits_{k = 1}^{m} e_{ik}$$
where \(e_{ik}\) is the edge lengths in meters.
TE is an 'Area and edge metric'. Total (class) edge includes all edges between class i and
all other classes k. 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.
Meters
TE >= 0
Equals TE = 0 if all cells are edge cells. Increases, without limit, as landscape becomes more fragmented
McGarigal, K., SA Cushman, and E Ene. 2012. FRAGSTATS v4: Spatial Pattern Analysis Program for Categorical and Continuous Maps. Computer software program produced by the authors at the University of Massachusetts, Amherst. Available at the following web site: https://www.umass.edu/landeco/
lsm_p_perim
lsm_l_te