File:DavidsonTrig.jpg

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Description
English: Davidson en:Trig point on en:Red Hill, Australian Capital Territory.

From ACT Govt info on Survey Control Marks - In the ACT trig stations consist of a ground mark with a white quadripod supporting a black disc above the ground mark. Most of these Trig Stations are part of the ACT Precision Zone: a national geodetic survey and adjustment carried out in the early 1970s. The ACT Precision Zone and its associated marks have been the primary control for all new development in the ACT since the early 1970s. The accuracy of ACT Precision Zone marks is 1 in 250,000.

Further information on Geodetic survey in Australia - now and history.
Date 2 May 2005 (original upload date)
Source Transferred from en.wikipedia to Commons by Bidgee using CommonsHelper.
Author Matilda at English Wikipedia
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The original description page was here. All following user names refer to en.wikipedia.
  • 2005-05-02 00:25 Matilda 718×898× (60281 bytes) Davidson [[Trig point]] on [[Red Hill, Australian Capital Territory]]. From [http://www.actpla.act.gov.au/actlic/surveycontrolmarks/ ACT Govt info on Survey Control Marks] - In the ACT trig stations consist of a ground mark with a white quadripod support

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current01:59, 3 January 2009Thumbnail for version as of 01:59, 3 January 2009718 × 898 (59 KB)Bidgee{Information |Description={{en|Davidson en:Trig point on en:Red Hill, Australian Capital Territory. From [http://www.actpla.act.gov.au/actlic/surveycontrolmarks/ ACT Govt info on Survey Control Marks] - In the ACT trig stations consist of

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