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Monitoring Station Movement using a State-Wide Simultaneous ‘Adjustment of Everything’− Implications for a Next-Generation Australian Datum
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BibTeX
@MISC{Haasdyk_monitoringstation,
author = {Joel Haasdyk and Craig Roberts},
title = {Monitoring Station Movement using a State-Wide Simultaneous ‘Adjustment of Everything’− Implications for a Next-Generation Australian Datum},
year = {}
}
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Abstract
The establishment of a next-generation Australian datum is currently being investigated. Such datum update is required to accommodate the increasing accuracy and improved spatial and temporal resolution available from modern positioning technologies to an ever-broadening user base. While the spatial community debates the costs, benefits and optimum implementation of a new datum, each Australian state and jurisdiction is currently preparing a dataset containing all available geodetic measurements from their archives. New computing technologies mean that state-wide and even nation-wide adjustments are now routinely possible with an essentially unlimited number of stations and measurements, while new measurements can be incorporated immediately when they are available. This study discusses the opportunities and limitations of a simultaneous adjustment of all available GNSS measurements for monitoring the movement of geodetic survey stations. Two case studies in NSW are presented to highlight the different implications of land movement versus station instability on potential datum deformation models in the vicinity of these stations. Additional measurements via ‘crowd-sourcing ’ methodologies would help to maintain the currency and relevance of the datum, while traditionally non-geodetic techniques such as DInSAR and LiDAR would be invaluable in defining the extent of any detected deformation. The results presented here are preliminary and aim to highlight areas of potential research, and promote discussion regarding datum update in the wider spatial community.
Keyphrases
next-generation australian datum station movement state-wide simultaneous adjustment everything implication datum update available gnss measurement additional measurement different implication unlimited number crowd-sourcing methodology detected deformation australian state spatial community non-geodetic technique wider spatial community nation-wide adjustment case study simultaneous adjustment potential datum deformation model new datum temporal resolution potential research available geodetic measurement optimum implementation land movement versus station instability geodetic survey station new measurement promote discussion ever-broadening user base
