Flag low-precise geographic coordinates

Source: R/bdc_coordinates_precision.R

This function flags records with a coordinate precision below a specified number of decimal places. Coordinates with one, two, or three decimal places present a precision of~11.1 km, ~1.1 km, and ~111 m at the equator, respectively.

bdc_coordinates_precision(
  data,
  lat = "decimalLatitude",
  lon = "decimalLongitude",
  ndec = c(0, 1, 2)
)

Arguments

data

data.frame. A data.frame containing geographic coordinates.

lat

character string. The column with latitude in decimal degrees and WGS84. Default = "decimalLatitude".

lon

character string. The column with longitude in decimal degrees and WGS84. Default = "decimalLongitude".

ndec

numeric. The minimum number of decimal places that the coordinates should have to be considered valid. Default = 2.

Value

A data.frame with logical values indicating whether values are equal or higher than the specified minimum decimal number (ndec). Coordinates flagged as FALSE in .rou column are considered imprecise.

Examples

x <- data.frame(
  lat = c(-21.34, 23.567, 16.798, -10.468),
  lon = c(-55.38, -13.897, 30.8, 90.675)
)

bdc_coordinates_precision(
  data = x,
  lat = "lat",
  lon = "lon",
  ndec = 3
)
#> bdc_coordinates_precision:
#> Flagged 2 records
#> One column was added to the database.
#>       lat     lon  .rou
#> 1 -21.340 -55.380 FALSE
#> 2  23.567 -13.897  TRUE
#> 3  16.798  30.800 FALSE
#> 4 -10.468  90.675  TRUE