135th meridian east, Geographic reference line in South Australia, Australia
The 135th meridian east is a line of longitude running from the North Pole to the South Pole, passing through four countries and separating distinct time zones and jurisdictions. It crosses through the Northern Territory and South Australia on the mainland, then extends into the Southern Ocean and Antarctic regions.
Australian surveyors established this meridian as an administrative boundary during the 1800s as territories developed across the continent. It was later standardized in international mapping systems to create a consistent reference point for global navigation and time zone calculations.
The meridian serves as a reference point for Indigenous Australian communities who maintain traditional land management practices across South Australia.
This line appears on modern maps and GPS devices, making it easy to locate on any navigation system. Visitors can pinpoint their exact location relative to this meridian if they travel to places where it serves as a visible boundary or marker.
This longitudinal line passes through Lake Eyre, Australia's largest salt lake, which sits 15 meters below sea level.
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