Generate a table of stratum areas — get_area • survdat

Calculates the area of a polygon from a shapefile.

get_area(areaPolygon, areaDescription)

Arguments

areaPolygon: sf object. Name of the object containing the shapefile.
areaDescription: Character String. Column name from areaPolygon that contains the strata designations.

Value

Returns a data.table (nx2).

STRATA: The name of each Region
AREA: The area of the STRATA in square kilometers

Coordinate reference system (CRS)

The deafult CRS is the Lambert Conformal Conic as is denoted by :

"+proj=lcc +lat_1=20 +lat_2=60 +lat_0=40 +lon_0=-72 +x_0=0 +y_0=0 +datum=NAD83 +units=m +no_defs +ellps=GRS80 +towgs84=0,0,0 "

See also

Other survdat: calc_stratified_mean(), calc_swept_area(), get_survdat_clam_data(), get_survdat_data(), get_survdat_scallop_data()

Examples

if (FALSE) { # \dontrun{
#Find the area of each Stratum in the strata.shp shapefile (bundled with the package)
area <- sf::st_read(dsn=system.file("extdata","strata.shp",package="survdat"))
get_area(areaPolygon = area, areaDescription="STRATA")
} # }