define_shapefiles {ggOceanMaps} | R Documentation |
Define a shapefile to use in plotting from the limits argument
Description
An internal function to make basemap
code more readable
Usage
define_shapefiles(limits, force_dd = FALSE)
Arguments
limits |
A numeric vector of length 4: The first element defines the minimum longitude, the second element the maximum longitude, the third element the minimum latitude and the fourth element the maximum latitude of the bounding box. |
force_dd |
Logical indicating whether the shapefile should be forced to DecimalDegree. Required for transforming dd_* shapefile objects to other projections. |
Details
This is an internal function, which is automatically run by the basemap
function.
Value
A list containing the correct shapefile, a logical statement whether the limits were supplied as decimal degrees and coordinate reference system.
Author(s)
Mikko Vihtakari
See Also
[Package ggOceanMaps version 2.2.0 Index]