page_title: Queensland borders
section_title: The official determination survey
hierarchical_section_title: Queensland borders / Surveying the Queensland-New South Wales border / The official determination survey
caption_attribution_description: English: Marker for Cameron Corner, the point where the borders of Queensland, South Australia and New South Wales meet. Français&#160;: Cameron's corner point d'intersection du Queensland, de l'Australie méridionale et de la Nouvelle Galles du sud
context_page_description: Queensland is the north-eastern state of Australia and has land borders with three other Australian states and territories: New South Wales, South Australia and Northern Territory. To the north of Queensland is the Torres Strait separating the Australian mainland from Papua New Guinea. To the east of Queensland is the Coral Sea, part of the Pacific Ocean. There are many islands off the Queensland coast which form part of the state of Queensland.
  The far western boundary with the Northern Territory is aligned along the 138th meridian east until Poeppel Corner at the intersection of this meridian and the 26th parallel south. It is here that Queensland borders South Australia. The boundary follows this latitude until it reaches the 141st meridian east at Haddon Corner where the border turns south reaching Cameron Corner on the 29th parallel south, the most western part of the border with New South Wales. The border follows this latitude towards the coast at about the 154th meridian east before following the courses of a number of rivers, then across a number of mountain ranges until it reaches Point Danger.
context_section_description: The official survey of the 29ºS parallel was conducted by John Brewer Cameron (NSW) and George Chale Watson (Qld) between 1879 and 1881.
  Astronomical observations were taken at the Barringun telegraph station to determine the latitude and longitude. Following these observations, the Zero Obelisk was erected on the banks of the Warrego River, just north of the town.
  From this mark, the first 5 mile chord was produced westerly and the mile posts offset from this chord to the arc (chord and arc are used when surveying latitude to allow for curvature of the earth). This continued until the survey intersected longitude 141º (now known as Cameron Corner), a distance of 285 miles 24.96 chains. That spot is marked by the Cameron Corner Survey Marker.
  Watson withdrew from the survey and Cameron then returned to the Zero Obelisk at Barringun and marked the line to the east in a similar fashion. Cameron then erected a 1 ton survey post on the west bank of the Barwon River to mark the end of the survey.
caption: Cameron's Corner survey mark
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