The purpose of this Standard is to -(a) specify requirements relating to the design, construction, measurement, maintenance and monitoring of a railway survey system, to be able to support various engineering activities undertaken within, and applicable to a modern railway environment;(b) achieve a standardised approach to railway engineering surveying; and(c) provide mandatory and recommended guidance so that the rail survey system developed is aligned with the safe operation of the railway network, in accordance with the requirements of Rail Safety National Law.This Standard covers surveying systems for railways as defined under AS 7630 Railway Infrastructure - Track Classification. This Standard is intended to cover railway survey systems based on - (a) the current National Geospatial Reference Systems (NGRS) for Australia and New Zealand; and (b) non-NGRSs This Standard is not specifically intended to cover urban on-street tramway, or light rail networks, cane railways, or heritage railways operating on a private reservation but items from this Standard may be applied to such systems.