Internal function to load large shapefile objects. Downloads the files if they are not found getOption("ggOceanMaps.datapath")
load_map_data(x, force = FALSE)
A list of SpatialPolygonsDataFrames
An object from shapefile_list
.
Logical indicating whether to download the file even though it exists. Useful when files in the Github repository have been changed. Overwrites the old file.
Mikko Vihtakari
This is an internal function, which is automatically run by the basemap
function. Common users do not need to worry about these details.
basemap