Determine the country of all dates in a c14_date_list from their coordinates

c14bazAAR::determine_country_by_coordinate() adds the column country_coord with standardized country attribution based on the coordinate information for the dates. Due to the inconsistencies in the country column in many c14 source databases it's often necessary to rely on the coordinate position (lat & lon) for country attribution information. Unfortunately not all source databases store coordinates.

Usage

determine_country_by_coordinate(x, suppress_spatial_warnings = TRUE)

# S3 method for default
determine_country_by_coordinate(x, suppress_spatial_warnings = TRUE)

# S3 method for c14_date_list
determine_country_by_coordinate(x, suppress_spatial_warnings = TRUE)

Arguments

x

an object of class c14_date_list

suppress_spatial_warnings

suppress some spatial data messages and warnings

Value

an object of class c14_date_list with the additional column country_coord

Examples

library(magrittr)
example_c14_date_list %>%
  determine_country_by_coordinate()
#> rgeos version: 0.6-4, (SVN revision 699)
#>  GEOS runtime version: 3.10.2-CAPI-1.16.0 
#>  Please note that rgeos will be retired during October 2023,
#> plan transition to sf or terra functions using GEOS at your earliest convenience.
#> See https://r-spatial.org/r/2023/05/15/evolution4.html for details.
#>  GEOS using OverlayNG
#>  Linking to sp version: 2.0-0 
#>  Polygon checking: TRUE 
#> Determining country by coordinates... 
#> 	Radiocarbon date list
#> 	dates: 9
#> 	sites: 4
#> 	countries: 5
#> 	uncalBP: 9000 ― 1000 
#> 
#> # A data frame: 9 × 20
#>   sourcedb method labnr c14age c14std c13val site   sitetype     feature period 
#>   <chr>    <chr>  <chr>  <int>  <int>  <dbl> <chr>  <chr>        <chr>   <chr>  
#> 1 A        Conv   lab-1   1000     20    -15 Site A Burial mound Grave 1 NA     
#> 2 A        Conv   lab-2   2000     30    -20 Site A NA           Grave 2 Bronze…
#> 3 A        AMS    lab-3   3000     40    -25 Site B settlement   NA      Bronze…
#> 4 B        NA     lab-4   4000     50    -15 Site B settlement   House 5 Late N…
#> 5 B        AMS    lab-5   5000     50    -20 Site C settlement   NA      NA     
#> 6 B        AMS    lab-6   6000     60    -25 Site C settlement   Oven 4  Early …
#> 7 C        AMS    lab-7   7000     70    -15 Site D Camp         Hut 2   Mesoli…
#> 8 C        AMS    lab-8   8000     80    -20 Site D Camp         Hut 2   Mesoli…
#> 9 C        AMS    lab-9   9000     90    -25 Site D Camp         Hut 3   Mesoli…
#> # ℹ 10 more variables: culture <chr>, material <chr>, species <chr>,
#> #   region <chr>, country <chr>, country_coord <chr>, lat <dbl>, lon <dbl>,
#> #   shortref <chr>, comment <chr>