Read a coastline file in R, Splus, mapgen, shapefile, or openstreetmap format. The S and R formats are identical, and consist of two columns, lon and lat, with land-jump segments separated by lines with two NAs. The MapGen format is of the form
# -b -16.179081 28.553943 -16.244793 28.563330
BUG: the 'arc/info ungenerate' format is not yet understood.
read.coastline( file, type = c("R", "S", "mapgen", "shapefile", "openstreetmap"), debug = getOption("oceDebug"), monitor = FALSE, processingLog )
name of file containing coastline data.
type of file, one of
set to TRUE to print information about the header, etc.
print a dot for every coastline segment read (ignored except for reading "shapefile" type)
if provided, the action item to be stored in the log. (Typically only provided for internal calls; the default that it provides is better for normal calls by a user.)
a coastline object.