mapme.biodiversity (version 0.9.3)

elevation: Calculate elevation statistics

Description

This function allows to calculate elevation statistics for polygons. For each polygon, the desired statistic(s) are returned.

Usage

calc_elevation(engine = "extract", stats = "mean")

Value

A function that returns an indicator tibble with specified elevation statistics as variable and corresponding values (in meters) as value.

Arguments

engine

The preferred processing functions from either one of "zonal", "extract" or "exactextract" as character.

stats

Function to be applied to compute statistics for polygons either one or multiple inputs as character "mean", "median" or "sd".

Details

The required resources for this indicator are:

• nasa_srtm

Examples

# \dontshow{
mapme.biodiversity:::.copy_resource_dir(file.path(tempdir(), "mapme-data"))
# }
if (FALSE) {
library(sf)
library(mapme.biodiversity)

outdir <- file.path(tempdir(), "mapme-data")
dir.create(outdir, showWarnings = FALSE)

mapme_options(
  outdir = outdir,
  verbose = FALSE
)

aoi <- system.file("extdata", "sierra_de_neiba_478140_2.gpkg",
  package = "mapme.biodiversity"
) %>%
  read_sf() %>%
  get_resources(get_nasa_srtm()) %>%
  calc_indicators(
    calc_elevation(engine = "extract", stats = c("mean", "median", "sd", "var"))
  ) %>%
  portfolio_long()

aoi
}