Abstract
Abstract To investigate bank stability, soil erosion and water salinity in the Mary River Catchment in the Northern Territory, the rapid static method of GPS surveying has been used to establish 28 monitoring stations on the river’s tidal plains. The project required the computation of a geoid model for the site to allow orthometric heights to be derived from the GPS survey. This paper describes the Mary River GPS project and the development of the associated geoid model, highlighting the use of new geoid modelling software based on the general model of least squares collocation and developed to run on a personal computer.
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