rectPeri: Given rectangle code return perimeter as a polygon in lat lon

In geo: Draw and Annotate Maps, Especially Charts of the North Atlantic

Description

The outline/boundary of a statistical rectangle is returned as 5 positions, the first and last of which are the same.

Usage

rPeri(r)
srPeri(sr)
mrPeri(mr, dlat = 5, dlon = 10)
drPeri(dr, dlat = 1, dlon = 2)

Arguments

r, sr, mr, dr	Rectangle codes.
dlat, dlon	Dimensions of latitude and longitude given in minutes and degrees for mrPeri and drPeri, respectively.

Value

Rectangle outline as 5 positions.

Note

Should perhaps be extended to give a list or dataframe of polygons for more than one r, sr, mr or dr.

See Also

deg2rect, rectArea, geoarea.

Examples

  geoplot(island, type = "n", grid = FALSE)
  geolines(rPeri(468))
  geolines(srPeri(4681))

geo documentation built on May 2, 2019, 5:22 p.m.