CoordinateCleaner (version 1.0-7)

cc_zero: Flag Zero Coordinates

Description

Flags records with either zero longitude or latitude and a radius around the point at zero longitude and zero latitude. These problems are often due to erroneous data-entry or geo-referencing and can lead to typical patterns of high diversity around the equator.

Usage

cc_zero(x, lon = "decimallongitude", lat = "decimallatitude", 
        buffer = 0.5, value = "clean", verbose = TRUE)

Arguments

x

a data.frame. Containing geographical coordinates and species names.

lon

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

lat

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

buffer

numerical. The buffer around each province or country centroid, where records should be flagged as problematic, in decimal degrees. Default = 0.1.

value

a 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, with TRUE = test passed and FALSE = test failed/potentially problematic (“flags”). Default = “clean”.

Examples

# NOT RUN {
x <- data.frame(species = "A", 
                decimallongitude = c(0,34.84, 0, 33.98), 
                decimallatitude = c(23.08, 0, 0, 15.98))
                
cc_zero(x)
cc_zero(x, value = "flags")
# }