mapme.biodiversity (version 0.9.2)

traveltime_2000: Calculate accessibility statistics for the year 2000

Description

Accessibility refers to the ease with which cities can be reached from a certain location. This function allows efficient calculation of accessibility statistics (i.e., travel time to the nearest city) for polygons. For each polygon, the desired statistic/s (mean, median or sd) is/are returned.

Usage

calc_traveltime_2000(engine = "extract", stats = "mean")

Value

A function that returns an indicator tibble with accessibility statistics for the year 2000 as variables and corresponding values (in minutes) as values.

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 single or multiple inputs as character. Supported statistics are: "mean", "median", "sd", "min", "max", "sum", "var".

Details

The required resource for this indicator is:

• accessibility_2000

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_accessibility_2000()) %>%
  calc_indicators(
    calc_traveltime_2000(stats = c("mean", "median", "sd"), engine = "extract")
  ) %>%
  portfolio_long()

aoi
}