11.3.3.2 Indexing

Indexing of the GP grid is more complicated than for the other grids because there is no natural sequence or order in how the variety of grid elements within the grid representation may appear. Cell ordering for these hybrid grids is defined using a “patch” construction (For more information on patches, see 6.3 Patches .) The unique index of each patch defines its relative order, i.e., if a GP grid combines multiple IJK grids into a single global grid, the patch indices will specify their order.