area/density/edge metrics
Post on 05-Feb-2016
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Area/Density/Edge Metrics• Patch radius of gyration –
measure of avg distance organism can move within a patch before patch bnd(extent)
• Correlation length
(Area-weighted mean radius of gyration) –class or landscape level; each patch weighted by A.
Physical connectedness
• Largest patch index (LPI) – % landscape comprised of single largest patch (class or landscape level)
Shape Metrics• Shape index
• Measures the complexity of patch shape; compare to std shape (square) of same size
• P:A dependency resolved
• P (patch) / P (square)
Core Area Metrics• Core area
Shape effect – inverse
Area effect - positive
Edge depth effect – inverse
- Confounding effects
Advantage = integrative
Disadvantage = confounds
Aggregation Metrics
Connectivity Metrics
– Connectivity (-index of nodes and linkages; range 0 to 1)
•
•
• where: L = number of links in the network
• V = number of nodes in the network
)2(3max
V
L
L
L
Point Pattern Analysis
• Kernel estimators
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