nineregions
Nineregions is a partitioning concept used in spatial analysis and related fields to divide a bounded area into nine distinct regions. The most common arrangement places a central region at the middle with eight surrounding regions arranged in a 3x3 grid.
Construction and variants: The standard method overlays a 3x3 lattice on the domain, yielding nine cells that
Applications: Nineregions provides a simple, standardized framework for comparing metrics across zones, testing spatial interaction models,
Limitations and considerations: The choice of boundaries and the grid orientation can substantially influence results. The
See also: 3x3 grid, grid-based partitioning, spatial analysis, zonal statistics.