Tuesday, 27 June 2017

Botanic Gardens, survey pillar

This survey pillar is located in the Botanic Gardens overlooking Sydney Harbour between Bennelong Point and Mrs Macquaries Point. The plaque reads: "This Survey Observation Pillar has been established to monitor Opera House Deflection movements and provide local control station for Sydney Integration Surveys. May 1976." Also known as triangulation stations or triangulation pillars, these are used for long term monitoring and observations.

14 comments:

  1. Interesting looking survey marker. Bet there is a story about how it is used.

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  2. What a neat looking working object nestled in the greenery.

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  3. ...Jim, what a nice view from this point. Surveying has surely changed over the years, GPS has been a gane changer! Thanks for stopping by, enjoy your week and please come again.

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  4. Thanks for visiting my blog. It is always good to read some interesting facts of Australia! Thank you!

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  5. Who knew? So many things in this world that I don't know about.

    Worth a Thousand Words

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    1. It's amazing what can be around you but sometimes you don't notice.

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  6. that's a different kind of survey marker.

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  7. I love tripping across things like this. But I do wonder what Opera House Deflections are and how they are measured!

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  8. Deflection movements? Oh my - not sure I like the sound of that! What does that MEAN!
    Thanks for sharing at http://image-in-ing.blogspot.com/2017/06/shades-of-purple.html

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  9. This is new to me! I'd love to see the botanical gardens.

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Thanks for visiting my blog. Please leave me a message. Jim.

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