cc_equ: Identify Records with Identical lat/lon

In azizka/CoordinateCleaner: Automated Cleaning of Occurrence Records from Biological Collections

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
)

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.

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”.

See Also

Other Coordinates: cc_aohi(), 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")

azizka/CoordinateCleaner documentation built on March 10, 2024, 8:32 a.m.