; Surface survey Notts 2 to Lost Johns ; 21/6/2010 ; Tim Allen instruments ; Hugh St Lawrence book ; Tim's instruments *begin NottsToLJSurface *export 0 26 tag *date 2010.6.21 ; mag decl from http://www.ngdc.noaa.gov/geomagmodels/struts/calcDeclination ; lat/long for that neck of the woods = 54.25 N 2.5 W on 21/6/2010 ; surface survey - mag decl for 2010 = 2.98 deg W ; true N to grid N correction = -0.33 ; *calibrate declination 2.65 ; On 11/07/10 Tim got a calibration of 332 at Bull Pot Farm (reading should be 328 so correction of +4 since *calibrate takes [reading - calibration]) ;commented out by Simon Cornhill 2019.04.27 as it is superseded by *declination auto in leckfell.svx ;*calibrate compass +4 0 1 26.6 51 17 ;Notts2 centre of lid 1 2 21.05 51.5 8 2 3 19.7 26 8 3 4 10.9 359 3 ;4=kango hole 4 5 15.8 52 2 5 6 15.8 64 6 6 7 17.4 53 5 7 8 19.1 63 4 8 9 24.7 72 5 9 10 20.5 26 7 10 11 31.5 2 4 ;11= south edge of big shakehole 11 12 31.6 18 4 ;12= far side of big shakehole 12 13 23.9 8 5.5 13 14 17.1 76 2 ;14= NCC hole 14 15 32 16 5 ;15= gate 15 16 23.4 31 4 16 17 23.3 45 6 17 18 29.7 52 5 18 19 15.9 70 2 ;19= STARTING HANDLE HOLE 19 20 31.4 51 4 20 21 36.5 67 2.5 ;21= small sink under wall 21 22 39.1 65 5 22 23 42.6 74 5.5 ;23= LJ gatepost 23 24 27.4 135 0 24 25 11.9 155 -22 ;edge of LJ gully 25 26 7 352 -15 ;entrance LJ leftside head height tag 26 2.3 332 -24 ;added later, 25.07.10 by Becka from info from email from Tim who has now found the LJ tag which is "tag" *end NottsToLJSurface