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Function to quickly draft the edge of the equirectangular projection

Source: R/utility.R
mapedge.Rd

Function to plot the edge of a map with different projections.

Usage

mapedge(
  x = 360,
  y = 180,
  xmin = -180,
  xmax = 180,
  ymin = -90,
  ymax = 90,
  out = "sf"
)

Arguments

x

(numeric) Number of segments in the x (longitude) dimension.

y

(numeric) Number of segments in the y (latitude) dimension.

xmin

(numeric) Minimum value of x (longitude).

xmax

(numeric) Minimum value of x (longitude).

ymin

(numeric) Maximum value of y (latitude).

ymax

(numeric) Maximum value of y (latitude).

out

(character) Output format, either "sf" or "sp". The default "sf" returns simple feature geometries, "sp" returns SpatialPolygons from the sp package.

Value

An sfc-, or SpatialPolygons-class object.

Examples

# requires rgdal
edge <- mapedge()
molledge <- st_transform(edge, "ESRI:54009")
plot(molledge)