zonal_operation: Compute zonal statistics from provided raster files

In Ohm-Np/openRspat: Open source geo-spatial analysis

Compute zonal statistics from provided raster files

Description

Compute zonal statistics from provided raster files

Usage

zonal_operation(aoi = NULL, idcol = NULL, rast = NULL, opn = "mean")

Arguments

aoi	An sf object with polygons representing areas of interest
idcol	A character vector identifying a column name which uniquely identifies the polygons in the aoi object.
rast	A raster object as spatRaster on which to perform zonal operation
opn	A type of zonal operation (sum/mean/min/max) - mean being default value

Value

A dataframe with zonal statistics

Examples

# load raster
rast <- terra::rast(system.file("extdata", "test_worldpop2020.tif", package = "openRspat"))
# load polygon
aoi <- sf::st_read(system.file("extdata", "test_wdpa.gpkg", package = "openRspat"))
# provide unique id column
idcol <- "WDPAID"
# zonal operation type
opn <- "min"
# call function
zonal_operation(aoi, idcol, rast, opn)

Ohm-Np/openRspat documentation built on June 23, 2022, 3:03 p.m.