elevation function

Calculate elevation statistics

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

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

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".

Returns

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

Details

The required resources for this indicator are:

• nasa_srtm

Examples

## Not run:

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
## End(Not run)