Total (class) edge (Area and Edge metric)
Arguments
- landscape
Raster* Layer, Stack, Brick, SpatRaster (terra), stars, or a list of rasterLayers.
- count_boundary
Include landscape boundary in edge length
- directions
The number of directions in which patches should be connected: 4 (rook's case) or 8 (queen's case).
Details
$$TE = \sum \limits_{k = 1}^{m} e_{ik}$$
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
cound_boundary = TRUE
also edges to the landscape boundary are included.
References
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: http://www.umass.edu/landeco/research/fragstats/fragstats.html