Decimal degree grid from UTM projected spatial objects

Outputs a list of grid lines that can be used to plot a grid on maps. Requires a spatial object projected using UTM coordinates

deg_grid(
  dat,
  round.lat = FALSE,
  n.lat.grid = 3,
  round.lon = FALSE,
  n.lon.grid = 3,
  n.points = 30
)

Arguments

dat	`basemapLimits` object
round.lat	specifying the level of rounding to be used to plot latitude grid lines. Overrides `n.lat.grid`
n.lat.grid	number of latitude grid lines. Alternatively use `round.lat`
round.lon	specifying the level of rounding to be used to plot longitude grid lines. Overrides `n.lon.grid`
n.lon.grid	number of longitude grid lines. Alternatively use `round.lon`
n.points	number of points used in creating the grid lines. The more points, the smoother the lines.

Returns a UTM coodrinate grid.

This is an internal function, which is automatically run by the basemap function. Common users do not need to worry about these details.