Numeric. Pump candidates to consider. Default is NULL: all pumps are used. Otherwise, selection by a vector of numeric IDs: 1 to 13 for pumps; 1 to 14 for pumps.vestry. Negative selection allowed.
metric
Character. "euclidean" or "walking".
vestry
Logical. TRUE uses the 14 pumps from the Vestry Report. FALSE uses the 13 in the original map.
latlong
Logical. Use estimated longitude and latitude.
multi.core
Logical or Numeric. TRUE uses parallel::detectCores(). FALSE uses one, single core. You can also specify the number logical cores. See vignette("Parallelization") for details.