hex_grid: Overlay grid on map

In hjsimpso/fungarium: An R package for enabling the use of fungaria collection data in comprehensive trait analyses

Overlay grid on map

Description

Overlays hexagonal grid cells of specified area onto equal area world map.

Usage

hex_grid(size)

Arguments

size	Integer specifying grid cell area (in square kilometers).

Details

World map projection is cylindrical equal area.

Value

sf object containing:

geometry

grid cell geometry

hex

hex number ID. Each grid cell has a unique number

size

the area (in sqauare kilometers) of each grid cell

Examples

library(fungarium)

#import world shape file
shp <- rnaturalearth::ne_countries('large', returnclass = "sf")

#transform to cylindrical projection (equal area)
shp <- sf::st_transform(shp, crs = "+proj=cea +ellps=WGS84 +datum=WGS84")

#get grid
grid <- hex_grid(80000)

hjsimpso/fungarium documentation built on Aug. 23, 2023, 3:59 p.m.