zero obelisk造句

The survey work began at Zero Obelisk at Paroo systems and then drought.
The Zero Obelisk marks the beginning of the first official survey of the border between the colonies of Queensland and New South Wales in 1879-80.
"' Zero Obelisk "'is a heritage-listed survey marker on the east bank of the Warrego River, Barringun, Shire of Paroo, Queensland, Australia.
The Zero Obelisk, Barringun marks the first official survey of the border between what were then the separate colonies of New South Wales and Queensland when an accurate definition of the border was important for legal and economic reasons.
Having determined the position for the border and the longitude of a point on it and the direction of the true meridian found, surveyors John Brewer Cameron from NSW and George Chale Watson ( Commissioner for Crown Lands for the Warrego and Gregory South ) representing Queensland, started to survey westerly on 15 September 1879 from a point on the east bank of the Warrego River where they had erected the Zero Obelisk.
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