Return immediate child cell IDs for each input cell

For each cell ID in cells at the current grid resolution, returns the IDs of its child cells at resolution dggs\$res + 1. Only hexagonal grids are supported.

Usage

dgchildren(dggs, cells)

Arguments

dggs: A dggs object from dgconstruct(). The child cells will be at dggs\$res + 1.
cells: Integer vector of cell sequence numbers (SEQNUM)

Value

A data frame with columns seqnum (the input cell) and child (each child cell ID at resolution + 1).

Examples

library(dggridR)
dgchildren(dgconstruct(res=3), c(1, 2))
#>    seqnum child
#> 1       1     1
#> 2       1    91
#> 3       1   172
#> 4       1   253
#> 5       1   334
#> 6       1    10
#> 7       2     2
#> 8       2    11
#> 9       2    12
#> 10      2     3
#> 11      2   406
#> 12      2   739