Dynamic network adjustment and the transition to GDA94

Abstract

As Australia faces the adoption of a new geodetic datum the question of how best to undertake the transition to that datum naturally arises. Without doubt the most comprehensive transformation strategies will require extensive re-adjustment of vast volumes of survey control data. This is true whether considering transformation of the survey control data itself or in the preparation of distortion models for the transformation of compiled data stored in spatial information systems. In light of the size of the transition task it is likely there will be more adjustments carried out in the next few years than previously required. The obvious need is for a process to consistently undertake the necessary adjustments in a rigorous and efficient manner. A newly developed technique known as Dynamic Network Adjustment offers the potential to satisfy this need and to maintain these networks once the initial readjustments have been completed.