obigeo: Occurrence-based biogeography

#' Cenozoic 6 subset of the Paleobiology Database
#' 
#' Fossil occurrences downloaded from the Paleobiology Database. This is a considerably old subset downloaded on 2018-12-05. 
#' 
#' @usage data(ceno6)
#' @format A \code{data.frame} with 61338 observations and 14 variables:
#' \describe{
#' 	\item{\code{collection_no}}{Collection number. }
#' 	\item{\code{early_interval}}{The older stratigraphic intercal. }
#' 	\item{\code{late_interval}}{Younger stratigraphic interval. }
#' 	\item{\code{group}}{Organismic group. }
#' 	\item{\code{lat}}{Collection latitude. }
#' 	\item{\code{lng}}{Collection longitude. }
#' 	\item{\code{paleolat}}{Paleolatitude. }
#' 	\item{\code{paleolng}}{Paleolongitude.}
#' 	\item{\code{clgen}}{Concatenated class and genus name. }
#' 	\item{\code{trinomen}}{Concatenated class, genus and species name. }
#' 	\item{\code{icos}}{Face ID based on the positions of the paleocoordinates on an icosa::hexagrid(c(4,3)) grid. }
#' 	\item{\code{icos2}}{Face ID based on the positions of the paleocoordinates on an icosa::hexagrid(c(7)) grid. }
#' 	\item{\code{stg}}{Time interval identifier in the 95-bin stage-level timescale, implemented in the 'divDyn' R package.}
#' 	\item{\code{stc}}{Spatiotemporal cell identifier: the icso2 and the stg values combined.}
#' }
"ceno6"

#' Random set of colors for the plotting of biogegoraphic partitionings
#' 
#' The  first 10-15 colors are manually selected for optimal contrast, the rest are procedurally generated. 
#' 
#' @usage data(allHex)
"allHex"

#' Z3 resolution land polygons from an older version of Openstreetmap
#' 
#' Land polygons useful for plotting of global maps.
#' 
#' @usage data(land)
"land"