selected for the scientific determinations of 1921 would later be found to be about 2 km east from the border of 129° east on that part of Rosewood Station, therefore inside the Northern Territory. Kimberley Obelisk The Kimberley Obelisk was erected as closely as was possible with the technology of 1927 to 129° east. Over several weeks during 1927, a Western Australian survey crew from the WA Department of Lands and Surveys travelled to Wyndham, then to the Austral Pillar site to set out from that point to the border, where they then erected the much more substantial Kimberley Obelisk. The Kimberley Obelisk has a copper plug embedded into the top of the concrete obelisk, which officially determines the WA/NT border on the ground, near 129° east, by a line drawn north to the northern coastline near the Joseph Bonaparte Gulf and south through this point at the Kimberley Obelisk to the 26th parallel. See also South Australia-Victoria border dispute Greenwich Time Signal Surveyor General Surveyor General of Western Australia References Borders of Australia Borders of Western Australia Borders of New South Wales Borders of South Australia Geography of the Northern Territory History of Western Australia History of South Australia History of New South Wales History of the Northern Territory Surveying Boundary markers