character; encoding to be assumed for input strings. If the
value is "latin1" or "UTF-8" it is used to mark character
strings as known to be in Latin-1 or UTF-8: it is not used to re-encode
the input.
parent
tkwin; the GUI parent window.
Value
Queries and sets the polys component of Data;
includes attributes of polys (data.poly and crop.poly),
see SetPolygonLimits.
Details
The text file representation of a polygon is of the following format:
x1 y1
x2 y2
...
x1 y1
x2 y2
...
The hole flag is either 1 to indicate a hole, or 0 for a regular contour.
See read.polyfile within the rgeos package for details.