Sampling site geographical coordiates

Latitude and longitude in decimal degrees for Stone Age ancient DNA samples from Mattila et al. (2023). Country codes Poland (P), Romania (R), Ukraine (U). "Verbose_population" column indicates simplified time period classification where "Mesolithic" indicates everything before European Neolithic (encompasses Mesolithic and potential Epipalaeolithic) and "Neolithic" everything after European Neolithic (encompasses Neolithic and Eneolithic).