Description Usage Arguments Details Value References See Also Examples

Effective Mesh Size (Aggregation metric)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | ```
lsm_c_mesh(landscape, directions)
## S3 method for class 'RasterLayer'
lsm_c_mesh(landscape, directions = 8)
## S3 method for class 'RasterStack'
lsm_c_mesh(landscape, directions = 8)
## S3 method for class 'RasterBrick'
lsm_c_mesh(landscape, directions = 8)
## S3 method for class 'stars'
lsm_c_mesh(landscape, directions = 8)
## S3 method for class 'list'
lsm_c_mesh(landscape, directions = 8)
``` |

`landscape` |
Raster* Layer, Stack, Brick or a list of rasterLayers. |

`directions` |
The number of directions in which patches should be connected: 4 (rook's case) or 8 (queen's case). |

*MESH = \frac{∑ \limits_{j = 1}^{n} a_{ij} ^ 2} {A} * \frac{1} {10000}*

where *a_{ij}* is the patch area in square meters and *A* is the
total landscape area in square meters.

The effective mesh size is an 'Aggregation metric'. Because each patch is squared
before the sums for each group i are calculated and the sum is standardized by the
total landscape area, MESH is a relative measure of patch structure. MESH is
perfectly, negatively correlated to `lsm_c_division`

.

Hectares

cell size / total area <= MESH <= total area

Equals cellsize/total area if class covers only one cell and equals total area if only one patch is present.

tibble

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

Jaeger, J. A. 2000. Landscape division, splitting index, and effective mesh size: new measures of landscape fragmentation. Landscape ecology, 15(2), 115-130.

`lsm_p_area`

,
`lsm_l_ta`

,

`lsm_l_mesh`

1 |

r-spatialecology/landscapemetrics documentation built on May 20, 2019, noon

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