read.coastline.shapefile {oce} | R Documentation |
Read coastline data stored in the shapefile format [1].
read.coastline.shapefile(file, lonlim = c(-180, 180), latlim = c(-90, 90), debug = getOption("oceDebug"), monitor = FALSE, processingLog)
file |
name of file containing coastline data (a file ending in |
lonlim, latlim |
numerical vectors specifying the west and east edges (and south and north edges) of a focus window. Coastline polygons that do not intersect the defined box are skipped, which can be useful in narrowing high-resolution world-scale data to a local application. |
debug |
set to TRUE to print information about the header, etc. |
monitor |
Logical indicating whether to print an indication of progress through the file. |
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.) |
An object of coastline-class
The following demonstrates that this code is getting close to working with depth contours. This should be handled more internally, and a new object for depth contours should be constructed, of which coastlines could be a subset.
Dan Kelley
1. The “shapefile” format is described in ESRI Shapefile Technical Description, March 1998, available at http://www.esri.com/library/whitepapers/pdfs/shapefile.pdf.
2. The NaturalEarth website http://www.naturalearthdata.com/downloads provides coastline datasets in three resolutions, along with similar files lakes and rivers, for borders, etc. It is highly recommended.
Other things related to coastline
data: [[,coastline-method
,
[[<-,coastline-method
,
as.coastline
,
coastline-class
,
coastlineBest
, coastlineCut
,
coastlineWorld
,
download.coastline
,
plot,coastline-method
,
read.coastline.openstreetmap
,
subset,coastline-method
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summary,coastline-method