Figure 1.

Examples of commonly defined neighbourhood definitions. (a) Fixed distance band, 1; (b) k-nearest neighbours; and (c) Voronoi polygon contiguity. The spatial relationships are defined in matrices. Reading across the rows, one can identify all the spatial locations that are neighbours for each point.

Nelson and Robertson Ecological Processes 2012 1:3   doi:10.1186/2192-1709-1-3
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