dbox                    King County ballot drop box locations
dist_km                 Calculate minimum distance in kilometers
dist_mile               Calculate minimum distance in miles
early_meck              Mecklenburg County early voting locations
haversine               Haversine distance between two points
king_geo                King County voter sample with geocoded
                        addresses
nearest_location        Find nearest polling locations for each voter
voter_meck              Mecklenburg County voter sample with geocoded
                        addresses
