CoordinateCleaner (version 2.0-20)

cc_equ: Identify Records with Identical lat/lon

Description

Removes or flags records with equal latitude and longitude coordinates, either exact or absolute. Equal coordinates can often indicate data entry errors.

Usage

cc_equ(
  x,
  lon = "decimallongitude",
  lat = "decimallatitude",
  test = "absolute",
  value = "clean",
  verbose = TRUE
)

Value

Depending on the ‘value’ argument, either a data.frame

containing the records considered correct by the test (“clean”) or a logical vector (“flagged”), with TRUE = test passed and FALSE = test failed/potentially problematic . Default = “clean”.

Arguments

x

data.frame. Containing geographical coordinates and species names.

lon

character string. The column with the longitude coordinates. Default = “decimallongitude”.

lat

character string. The column with the latitude coordinates. Default = “decimallatitude”.

test

character string. Defines if coordinates are compared exactly (“identical”) or on the absolute scale (i.e. -1 = 1, “absolute”). Default is to “absolute”.

value

character string. Defining the output value. See value.

verbose

logical. If TRUE reports the name of the test and the number of records flagged.

See Also

Other Coordinates: cc_cap(), cc_cen(), cc_coun(), cc_dupl(), cc_gbif(), cc_inst(), cc_iucn(), cc_outl(), cc_sea(), cc_urb(), cc_val(), cc_zero()

Examples

x <- data.frame(species = letters[1:10], 
                decimallongitude = runif(100, -180, 180), 
                decimallatitude = runif(100, -90,90))

cc_equ(x)
cc_equ(x, value = "flagged")