aggregate_zones: Aggregate data between zones Provides the ability to take...

In mikejohnson51/zonal: Performant zonal statistics over flexible units

Aggregate data between zones Provides the ability to take attributes from one scale of polygon and split aggregate them to another.

Description

Aggregate data between zones Provides the ability to take attributes from one scale of polygon and split aggregate them to another.

Usage

aggregate_zones(
  data,
  geom,
  crosswalk,
  ID = "divide_id",
  fun = "mean",
  join = TRUE,
  drop = NULL
)

Arguments

data	tabular data reference to the smaller unit
geom	sf, sfc, SpatialPolygonsDataFrame, or SpatialPolygons object with polygonal geometries
crosswalk	a crosswalk of smaller unit to major unit relations
ID	the grouping ID
fun	an optional function or character vector, as described below
join	if TRUE the geom will be joined to the results
drop	colnames to drop from table

Details

the cross walk table must have at least 4 columns containing the ID and areas of the small units and and the ID and areas of the large unit. The name of the large unit IDs is provided by the ID parameter in the function signature. The smaller unit IDs must have a corresponding attribute in the data input. The area of the larger units must be called areasqkm, while the area of the smaller units must be called s_areasqkm.

Value

data.frame or sf object

mikejohnson51/zonal documentation built on Aug. 19, 2024, 12:56 p.m.