Number of children between two resolutions

Returns the number of child cells each parent cell contains when expanding from one resolution to another.

Usage

a5_get_num_children(parent_resolution, child_resolution)

Arguments

parent_resolution

Integer scalar (0–30).

child_resolution

Integer scalar (0–30), must be >= parent_resolution.

Value

A numeric scalar. Returned as double because the count can exceed R's integer range at large resolution deltas.

See also

a5_get_num_cells(), a5_cell_to_children(), a5_uncompact()

Examples

a5_get_num_children(5, 8)   # 4^3 = 64
#> [1] 64
a5_get_num_children(0, 5)
#> [1] 1280