R/FIA.R

In asgersvenning/bachelor: Bachelor Data And Functions

#' FIA records aggregated to a equal area grid. 
#'
#' Species are encoded by FIA species codes, and coordinates are in EPSG:2163 (for details = "sf::st_crs(2163)$proj4string"). Density is species per FIA plot. 
#'
#' @format A tibble with 243 rows and 10 variables:
#' \describe{
#'   \item{INVYR}{dbl Year of inventory}
#'   \item{x}{dbl Longitudinal grid cell center.} 
#'   \item{y}{chr Latitudinal grid cell center.}
#'   \item{ID}{dbl Grid cell ID, can be used to join with asgerbachelor::aggregationGrid.}
#'   \item{samples}{dbl Number of FIA plots in grid cell at a given inventory year.}
#'   \item{SPCD}{dbl FIA species code.}
#'   \item{density}{dbl Number of species per plot in the bounding box. Calculated simply as number of individuals divided by number of plots.}
#' }
"FIA"