greenR (version 0.0.1.6)

gssi: Green Space Similarity Index (GSSI)

Description

This function calculates the Green Space Similarity Index (GSSI) for a list of cities, based on the variability of green space sizes and their connectivity. The function uses the spatstat package to calculate proximity measures and combines these with area-based metrics to form the GSSI. The index is useful for comparing urban green spaces across different cities.

Usage

gssi(green_spaces_list, equal_area_crs = "ESRI:54009")

Value

A numeric vector of normalized GSSI values for each city.

Arguments

green_spaces_list

A list of 'sf' objects, each representing the green spaces in a city.

equal_area_crs

A character string representing an equal-area CRS for accurate area measurement. Default is "ESRI:54009".

Examples

if (FALSE) {
d1 <- get_osm_data("New Delhi, India")
dsf <- d1$green_areas$osm_polygons
d2 <- get_osm_data("Basel, Switzerland")
bsf <- d2$green_areas$osm_polygons
d3 <- get_osm_data("Medellin, Colombia")
msf <- d3$green_areas$osm_polygons
cities_data <- list(dsf, bsf, msf)
gssi_values <- gssi(cities_data)
}