id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
62	Turn through angle surveying data style	Andrew	Olly Betts	"Total stations and the like, do not use magnetic north as zero. From a station angles to adjacent stations are read and the difference can be taken to find the 'turned through' angle.

Surveys undertaken in this method do not have any fixed angle in the plain and therefore would need 2 fixed or calculated points to connect to."	enhancement	new	minor		cavern			data