read.coastline: Read a coastline File

In oce: Analysis of Oceanographic Data

Read a coastline File

Description

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.

Usage

read.coastline(
  file,
  type = c("R", "S", "mapgen", "shapefile", "openstreetmap"),
  encoding = "latin1",
  monitor = FALSE,
  debug = getOption("oceDebug"),
  processingLog
)

Arguments

file	name of file containing coastline data.
type	type of file, one of "R", "S", "mapgen", "shapefile" or "openstreetmap".
encoding	a character value that indicates the encoding to be used for this data file, if it is textual. The default value for most functions is "latin1", which seems to be suitable for files containing text written in English and French.
monitor	print a dot for every coastline segment read (ignored except for reading "shapefile" type)
debug	set to TRUE to print information about the header, etc.
processingLog	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.)

Value

a coastline object.

Author(s)

Dan Kelley

oce documentation built on Sept. 11, 2024, 7:09 p.m.