*title "Balch Aven Chamber, Fairy Cave Quarry, Somerset"

*units length	metres
*units bearing	degrees
*units gradient	degrees

;specify grade 5 accuracy
*SD length	0.033 metres
*SD bearing	0.33 degrees
*SD gradient	0.33 degrees
*SD position	0.033 metres

;entrance co-ord										
*fix aven.0 65737.9 47545.8 173.9
*entrance aven.0										
										
*begin aven										
*copyright 2009 ATLAS
*calibrate declination 3									
										
*date 2009.06.19										
*team "Duncan Price" book instruments										
*team "Antoinette Bennett" tape"										
*instrument compass "434105"										
*instrument clino "708087"

*data normal from to length bearing gradient ignoreall
;from	to	length	bearing	gradient	stn	L	R	U	D	
1	0	3.35	342	10	;	0	0.25	0.25	0.2	0.2	(entrance)
2	1	4.35	258.5	11	;	1	1.1	1	0.1	0.3	(corner inside ent)
3	2	3.5	220	23	;	2	1.1	1.1	0.5	0.3	
4	3	9.8	252	42	;	3	1.1	0	0.5	0.8	
5	4	6.6	178	25	;	4	2	2.4	0.4	1.6	(jutting out bit of roof at base of pitch)
5	6	8	257	8	;	5	3	0	1	1.6	(wall)
7	6	7	81	-14	;	6	1	1	0.5	1	
8	5	4.4	269	32	;	7	1	1	0.5	0.5	
8	9	7	32	-30	;	8	2	5	3	1.8	
10	4	4.8	347	10	;	9	1	1	2	3	(rock across passage guessed)
11	10	6.1	257	10	;	10	1	2	1	0	
12	11	5.7	236	16	;	11	1.1	0.8	1.6	0.2
13	12	2.4	168	2	;	12	1	0.5	0	1
13	14	6	271	0	;	13	1	1	1	1
15	13	5.6	245	21	;	14	1	1	1	1
16	15	6	312	-10	;	15	2	2	1.5	1.5
17	16	5.5	291	20	;	16	3.5	7.5	4	1.5
18	17	7.2	358	5	;	17	2.1	3	1.5	1.5
;						18	1.5	2	4	1
;stn	left	right	up	down
*data passage station left right up down
0	0.25	0.25	0.2	0.2
1	1.1	1	0.1	0.3
2	1.1	1.1	0.5	0.3	
3	1.1	0	0.5	0.8
4	2	2.4	0.4	1.6
5	3	0	1	1.6
*data passage station left right up down
5	3	0	1	1.6
6	1	1	0.5	1
7	1	1	0.5	0.5
*data passage station left right up down
5	0	8	1	1.6
8	2	5	3	1.8
9	1	1	2	3
*data passage station left right up down
4	2	2.4	0.4	1.6
10	2	1	1	0
11	1.1	0.8	1.6	0.2
12	1	0.5	0	1
13	1	1	1	1
*data passage station left right up down
13	1	1	1	1
14	1	1	1	1
*data passage station left right up down
13	1	1	1	1
15	2	2	1.5	1.5
16	3.5	7.5	4	1.5
17	2.1	3	1.5	1.5
18	1.5	2	4	1
*end aven