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Table 1 Class metrics used to describe patterns of canopy cover (focal class, combining high and low canopy cover) around residential yards

From: Risk of tick-borne pathogen spillover into urban yards in New York City

Category

Acronym

Metric name

Description

Aggregation

COHESION

Patch cohesion index

Connectedness of patches

ENN_MN

Mean of Euclidean nearest-neighbor distance

Mean edge to edge distance to the nearest neighboring patch of the same type

NP

Number of patches

Number of patches

CLUMPY

Clumpiness index

Proportional deviation of the proportion of like adjacencies involving the focal class from that expected under a spatially random distribution

nLSI

Normalized landscape shape index

Ratio of the actual edge length of focal class in relation to the hypothetical range of possible edge lengths of the focal class (min/max)

AI

Aggregation index

Percentage of neighboring pixel, being the same land cover class, based on single-count method

IJI

Interspersion and juxtaposition index

Measure of evenness of patch adjacencies, equals 100 for even and approaches 0 for uneven adjacencies

MESH

Effective mesh size

Relative measure of patch structure based on probability that two randomly chosen points will be located in same patch

Area and edge

TE

Total edge

Total length (m) of all edges between focal class and all other classes

ED

Edge density

Sum of all edges of focal class in relation to landscape area

LPI

Largest patch index

Percentage of landscape covered by corresponding largest patch of each class

GYRATE_MN

Mean radius of gyration

Mean distance from each cell to the patch centroid

Shape

CONTIG_MN

Mean of contiguity index

Spatial connectedness of cells in patches

Core area

TCA

Total core area

Sum of all core areas of all patches belonging to focal class

CPLAND

Core area percentage of landscape

Percentage of core area of focal class in relation to the total landscape area

NDCA

Number of disjunct core areas

Number of cells of focal class without neighbors with a different value other than itself