sample-id	barcode-sequence	area	area.numeric
categorical	categorical	categorical	numeric
neg-cont-C6	CAGTTAATTCGG	neg_cont	0
STP0	TGCGTACCATCC	test_pit_top	1
STP2	ATAACTGCATCC	test_pit_turf	2
STP3	GAGGGCCTTCGG	test_pit_turf	2
STP4	TATTGTGCAGCC	test_pit_turf	2
STP5	AGAAACCTTCGG	test_pit_turf	2
STP6	CGCCATGCATCC	test_pit_turf	2
STP7	ATCTAGCCGGCC	test_pit_turf	2
STP8	GCGGTTGCATCC	test_pit_tephra	3
STP9	ATCCCAATTCTT	test_pit_tephra	3
STP10	TCGACCACAGCC	test_pit_prehistoric	4
STP11	CTCTTGGTTCTT	test_pit_prehistoric	4
STP12	AGCTGCACAGCC	test_pit_prehistoric	4
STP13	TCTCCGGTTCTT	test_pit_prehistoric	4
SRB1	CTAGTCACAGCC	riverbed	5
SRB3	GAGAAGGTTCTT	riverbed	5
SPCA	CCGTGGTCATCC	sheep_field	6