Thursday, May 18, 2006 at 08:38
Al
Maybe this is it:
Johnston Geodetic Station
This trigonometric survey cairn, situated about one kilometre north of Mt Cavenagh
Homestead, was built by officers of the Division of National Mapping in December 1965, and was once the central reference point for all Australian surveys. It was named after Fredrick Marshall Johnston, former Commonwealth Surveyor General and the first Director of National Mapping. Today, surveys are based on the Geocentric Datum of Australia (GDA), a new and more accurate Australian coordinate system which has replaced the Australian Geodetic Datum (AGD) of which the Johnston station is a major part. Further information on datum types and their applications is available from the geodesy pages, or from the Inter-governmental Committee on Surveying & Mapping (ICSM).
Location: 25 degrees 56 minutes 49.3 seconds south latitude, 133 degrees 12 minutes 34.7 seconds east longitude; position on SG53-05
Kulgera 1:250,000 and 5546
Kulgera 1:100,000 scale maps.
OR
Whilst drought and extreme heat thwarted Sturt's attempts, little did he envisage that one of his party,
John McDowall Stuart would instead, sixteen years later, claim the mantle of reaching the geographic centre…
"Sunday, 22 April 1860, Small Gum Creek, under
Mount Stuart, Centre of Australia - today I find from my observations of the sun, 111° 00' 30", that I am now camped in the centre of Australia. I have marked a tree and planted the British flag there."1
1 T. Flannery (ed.), The
Explorers, The Text Publishing Company,
Melbourne,1998.
Cheers
FollowupID:
429158