Data frame consisting of 4 columns: PID = primary polygon ID,
POS = position of each vertex within a given polygon, X
= longitude coordinate, and Y = latitude coordinate. Attributes:
projection = "LL".
Note
In R, the data must be loaded using the data function.
Source
Polygon data from the GSHHG (Global Self-consistent, Hierarchical,
High-resolution Geography) Database.
Download the native binary files of shoreline polygons, rivers, and borders
contained in the latest zip archive (version 2.3.4 ) at
http://www.soest.hawaii.edu/pwessel/gshhg/.