Understanding coordinate systems, datums and transformations in Australia
conference contributionposted on 2023-05-23, 04:35 authored by Janssen, V
Spatial professionals are required to handle an increasingly wide range of positioning information obtained from various sources including terrestrial surveying, Global Navigation Satellite System (GNSS) observations and online GNSS processing services. These positions refer to a multitude of local, national and global datums. A clear understanding of the different coordinate systems and datums in use today and the appropriate transformations between these is therefore essential to ensure rigorous consideration of reference frame variations in order to produce high-quality positioning results. This paper provides a compendium for spatial practitioners, reviewing the concepts and definitions of coordinate systems and datums in the Australian context and outlining the practical procedures for coordinate transformations in Australia, in relation to both horizontal and vertical datums. The differences between Cartesian, curvilinear and projection coordinates are explained and practical solutions for the required coordinate conversions and transformations are presented. The computational procedure for the transformation between orthometric and ellipsoidal heights in the absence of geoid undulations referenced to a regional ellipsoid is outlined.
Publication titleProceedings of the Surveying and Spatial Sciences Institute Biennial International Conference (SSC2009),
EditorsOstendorf, B., Baldock, P., Bruce, D., Burdett, M., Corcoran, P.
Department/SchoolSchool of Geography, Planning and Spatial Sciences
PublisherSurveying & Spatial Sciences Institute
Place of publicationAdelaide, Australia
Event titleSpatial Science Institute Biennial International Conference (SSC)
Date of Event (Start Date)2009-09-28
Date of Event (End Date)2009-10-02