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()
#> Determining country by coordinates... 
#> 	Radiocarbon date list
#> 	dates: 9
#> 	sites: 4
#> 	countries: 5
#> 	uncalBP: 9000 ― 1000 
#> 
#> # A data frame: 9 × 20
#>   sourc…¹ method labnr c14age c14std c13val site  sitet…² feature period culture
#>   <chr>   <chr>  <chr>  <int>  <int>  <dbl> <chr> <chr>   <chr>   <chr>  <chr>  
#> 1 A       Conv   lab-1   1000     20    -15 Site… Burial… Grave 1 NA     Fibula…
#> 2 A       Conv   lab-2   2000     30    -20 Site… NA      Grave 2 Bronz… Burial…
#> 3 A       AMS    lab-3   3000     40    -25 Site… settle… NA      Bronz… Burial…
#> 4 B       NA     lab-4   4000     50    -15 Site… settle… House 5 Late … NA     
#> 5 B       AMS    lab-5   5000     50    -20 Site… settle… NA      NA     Potter…
#> 6 B       AMS    lab-6   6000     60    -25 Site… settle… Oven 4  Early… Potter…
#> 7 C       AMS    lab-7   7000     70    -15 Site… Camp    Hut 2   Mesol… Stone …
#> 8 C       AMS    lab-8   8000     80    -20 Site… Camp    Hut 2   Mesol… Stone …
#> 9 C       AMS    lab-9   9000     90    -25 Site… Camp    Hut 3   Mesol… Stone …
#> # … with 9 more variables: material <chr>, species <chr>, region <chr>,
#> #   country <chr>, country_coord <chr>, lat <dbl>, lon <dbl>, shortref <chr>,
#> #   comment <chr>, and abbreviated variable names ¹​sourcedb, ²​sitetype