Make a grid from a Simple Feature Polygon

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)

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

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.

Note

The grid of the genetic algorithm will have a resolution of rotor * fcr. See the arguments of genetic_algorithm().

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)


# }