Regional geoid-model-based vertical datums - some Australian perspectives
MetadataShow full item record
The work is provided under the terms of Creative Commons Public License. The work is protected by copyright and/or other applicable law. Any use of the work other than as authorized under this license or copyright law is prohibited. http://creativecommons.org/licenses/by/3.0/legalcode
This article summarises some considerations surrounding a geoid-based vertical datum that have to be thought through before its implementation and adoption. Our examples are based on many Australian and some South-East Asian experiences, but these probably also apply elsewhere. The key considerations comprise data quality and availability, politics, and difficulties that users may encounter when adopting quite a different approach to height determination. We advocate some form of new vertical datum to replace the Australian Height Datum, but the exact type (whether using levelling or geoid, or some combination of both) still needs to be decided. We are not specifically opposed to the adoption of a geoid model as the vertical datum, but it is possibly more challenging than appears initially, and may even deter some users that are already well served by levelling-based vertical datums.
Showing items related by title, author, creator and subject.
Filmer, Michael; Featherstone, Will (2012)While the Intergovernmental Committee on Surveying and Mapping (ICSM) has stated that the Australian Height Datum (AHD) will remain Australia’s official vertical datum for the short to medium term, the AHD contains ...
Amos, Matthew (2007)One goal of modern geodesy is the global unification of vertical datums so that height data from them can be properly integrated. This thesis studies the unification of the 13 disparate levelling- and tide-gauge-based ...
Penna, N.; Featherstone, Will; Gazeaux, J.; Bingham, R. (2013)The spirit-levelling–based British vertical datum (Ordnance Datum Newlyn) implies a south–north apparent slope in mean sea level of up to 53 mm deg–1 latitude, due to the datum falling on heading northwards. Although this ...