Order Table

Summary of Ordnance Survey triangulation marks by order

type	1	2	3	4	13	total
apex	0	0	23	17	0	40
bolt	40	705	3260	1977	48	6032
centre	2	8	1423	322	1	1756
rivet	5	85	348	928	36	1404
pillar	292	2215	4285	273	39	7111
old trig	0	52	312	78	0	442
block	3	46	686	2494	59	3289
disc	0	20	111	16	10	157
mast	0	0	315	112	0	427
spire	0	7	1748	800	0	2555
tower	0	0	46	26	0	72
flagstaff	0	2	1612	739	0	2353
buried blk	9	16	515	2330	4	2874
chimney	0	3	353	395	0	751
vane	0	5	604	352	0	961
pinnacle	0	0	37	17	0	54
cut	0	5	30	65	11	111
belfry	0	1	35	58	0	94
aerial	0	0	31	9	0	40
beacon	2	0	26	24	0	52
lighthouse	3	2	134	47	0	186
l'ning c	2	2	60	30	0	94
dome	0	0	49	52	1	102
wire	0	0	7	0	0	7
cross	0	0	23	27	0	50
punch mark	0	0	7	10	0	17
memorial	0	1	9	5	0	15
obelisk	0	0	14	4	0	18
plate	0	0	0	16	0	16
pipe	0	0	3	24	0	27
cupola	0	0	51	67	0	118
monument	0	0	92	17	0	109
post	0	0	3	2	0	5
peg	0	1	2	2	0	5
pole	0	0	15	5	0	20
mark	0	0	8	2	0	10
cairn	0	0	12	4	0	16
spider	2	3	4	6	0	15
fenomark	0	0	4	0	10	15
curry st'l	0	3	6	0	0	9
pylon	0	0	9	6	0	15
vent	0	0	22	13	0	35
stone	0	0	4	0	0	4
hole	0	1	4	9	2	16
hydrog	0	0	4	0	0	4
topograph	0	1	1	1	0	3
lamp	0	0	5	5	0	10
turret	0	0	2	3	0	5
total	360	3184	16354	11389	221	31508

Descriptions of the different orders and types of mark are available.