Aggregate SpatialPolygonsDataFrame to new geometry.

Aggregate SpatialPolygonsDataFrame to new geometry.

sp_aggregate(zones, aggzones, cols = FALSE, FUN = sum,
  prop_by_area = ifelse(identical(FUN, mean) == FALSE, TRUE, FALSE),
  digits = getOption("digits"))

Arguments

zones	A SpatialPolygonsDataFrame or SpatialPointsDataFrame representing the original centroids or boundaries. Note that in the case of a SpatialPointsDataFrame, the original value will be allocated to the polygon in which the point is located rather than being distributed by area.
aggzones	A SpatialPolygonsDataFrame containing the new boundaries to aggregate to.
cols	A character vector containing the names of columns on which to apply FUN. By default, all numeric columns are aggregated.
FUN	Function to use on aggregation. Default is sum.
prop_by_area	Boolean value indicating if the values should be proportionally adjusted based on area. Default is TRUE unless FUN = mean.
digits	The number of digits to use when proportionally adjusting values based on area. Default is the value of getOption("digits").

Value

SpatialPolygonsDataFrame

Details

This function performs aggregation on a SpatialPolygonsDataFrame to a different geometry specified by another SpatialPolygons object.

Examples

# NOT RUN {
zones@data$region <- 1
zones@data[c(2, 5), c("region")] <- 2
aggzones <- sp::SpatialPolygonsDataFrame(rgeos::gUnaryUnion(
  zones,
  id = zones@data$region
), data.frame(region = c(1, 2)))
zones@data$region <- NULL
zones@data$exdata <- 5
library(sp)
sp_aggregate(zones, aggzones)
# }