Introduced in version 1.1.2. The specific coordinate reference system (crs) used for the included strata maps. North_America_Albers_Equal_Area_Conic, projection that provides good visualisation of the main areas covered by the North American Breeding Bird Survey
Examples
equal_area_crs
#> Coordinate Reference System:
#> User input: North_America_Albers_Equal_Area_Conic
#> wkt:
#> PROJCRS["North_America_Albers_Equal_Area_Conic",
#> BASEGEOGCRS["NAD83",
#> DATUM["North American Datum 1983",
#> ELLIPSOID["GRS 1980",6378137,298.257222101,
#> LENGTHUNIT["metre",1]]],
#> PRIMEM["Greenwich",0,
#> ANGLEUNIT["Degree",0.0174532925199433]]],
#> CONVERSION["unnamed",
#> METHOD["Albers Equal Area",
#> ID["EPSG",9822]],
#> PARAMETER["Latitude of false origin",40,
#> ANGLEUNIT["Degree",0.0174532925199433],
#> ID["EPSG",8821]],
#> PARAMETER["Longitude of false origin",-96,
#> ANGLEUNIT["Degree",0.0174532925199433],
#> ID["EPSG",8822]],
#> PARAMETER["Latitude of 1st standard parallel",20,
#> ANGLEUNIT["Degree",0.0174532925199433],
#> ID["EPSG",8823]],
#> PARAMETER["Latitude of 2nd standard parallel",60,
#> ANGLEUNIT["Degree",0.0174532925199433],
#> ID["EPSG",8824]],
#> PARAMETER["Easting at false origin",0,
#> LENGTHUNIT["metre",1],
#> ID["EPSG",8826]],
#> PARAMETER["Northing at false origin",0,
#> LENGTHUNIT["metre",1],
#> ID["EPSG",8827]]],
#> CS[Cartesian,2],
#> AXIS["easting",east,
#> ORDER[1],
#> LENGTHUNIT["metre",1]],
#> AXIS["northing",north,
#> ORDER[2],
#> LENGTHUNIT["metre",1]],
#> ID["ESRI",102008]]