windfarmGA (version 5.0.0)

grid_area: Make a grid from a Simple Feature Polygon

Description

Create a grid from a given polygon with a certain resolution and proportionality. The grid cell centroids represent possible wind turbine locations.

Usage

grid_area(area, size = 500, prop = 1, plot_grid = FALSE)

Value

Returns a list with 2 elements. List element 1 will have the grid cell IDS, and the X and Y coordinates of the centers of each grid cell. List element 2 is the grid as Simple Feature Polygons, which is used for plotting purposes.

Arguments

area

Simple Feature polygon of the site

size

Cell size of the grid in metres

prop

Minimum fraction of a cell that must overlap the site

plot_grid

Draw the grid

See Also

Other Helper Functions: get_grids(), hexa_area(), isSpatial(), permutations(), read_power_curve(), splitAt(), wind_from_series(), wind_from_uv(), windata_format()

Examples

# \donttest{
## Exemplary input Polygon with 2km x 2km:
library(sf)
area <- sf::st_as_sf(sf::st_sfc(
  sf::st_polygon(list(cbind(
    c(0, 0, 2000, 2000, 0),
    c(0, 2000, 2000, 0, 0)
  ))),
  crs = 3035
))

## Create a Grid
grid_area(area, 200, 1, TRUE)
grid_area(area, 400, 1, TRUE)

## Examplary irregular input Polygon
area <- sf::st_as_sf(sf::st_sfc(
  sf::st_polygon(list(cbind(
    c(0, 0, 2000, 3000, 0),
    c(20, 200, 2000, 0, 20)
  ))),
  crs = 3035
))

## Create a Grid
grid_area(area, 200, 1, TRUE)
grid_area(area, 200, 0.1, TRUE)
grid_area(area, 400, 1, TRUE)
grid_area(area, 400, 0.1, TRUE)
# }