alaeecology

Fragstats - IJI with less than 3 cover types

Discussion created by alaeecology on Mar 12, 2018

I have been calculating Interspersion and Juxtaposition Index values on raster maps of wetlands. IJI, however, cannot compute a value when there is less than three cover types (patch types) because of the nature of its calculation http://www.umass.edu/landeco/research/fragstats/documents/Metrics/Contagion%20-%20Interspersion%20Metrics/Metrics/L117%2… 

Because we are working with wetlands, we are primarily interested in the interspersion of open water and emergent vegetation. Has anyone also encountered this problem or know of a way of calculating IJI with less than 3 patch types?

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