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Calculate distances between PRIO-GRID cells

Source: R/pg_distance.R
pg_distance.Rd

Calculates great-circle distances between cell centres.

Usage

pg_distance(from, to, pairwise = TRUE, config = priogrid::pg_current_config())

Arguments

from

Source cell IDs.

to

Destination cell IDs.

pairwise

If TRUE, calculate element-wise distances with safe scalar recycling. If FALSE, calculate every source-destination combination.

config

A PRIO-GRID configuration object.

Value

A data frame with source and destination IDs and distance_km.

Examples

config <- priogrid::pg_config(nrow = 18, ncol = 36)
pg_distance(1:2, 2:3, config = config)
#>   from_pgid to_pgid distance_km
#> 1         1       2    96.79089
#> 2         2       3    96.79089
pg_distance(1:2, 1:3, pairwise = FALSE, config = config)
#>   from_pgid to_pgid distance_km
#> 1         1       1     0.00000
#> 2         1       2    96.79089
#> 3         1       3   192.85065
#> 4         2       1    96.79089
#> 5         2       2     0.00000
#> 6         2       3    96.79089