Australian Maritime Boundaries 2020: Territorial Baselines and Zones

Australia's maritime jurisdiction, including external territories, is represented in this geospatial dataset. Geoscience Australia developed the data, which shows territorial straight baselines, outer limits of maritime zones, and international treaty boundaries. The dataset currency is August 2019 and it reflects updates from the 2018 Timor Sea Treaty.

Use Cases

• Map Australia's exclusive economic zone (EEZ) based on the described maritime limits and boundaries.
• Analyze offshore petroleum and gas resource jurisdiction based on limits referenced from the OPGGSA Act.
• Visualize international maritime boundaries with neighboring countries based on treaty data included.
• Determine coastal state powers and adjacent waters based on representation of limits from State Powers Acts.

Strengths

• Data is the official digital representation of Australia's maritime limits under the Seas and Submerged Lands Act 1973.
• Coverage includes the entire Australian marine jurisdiction, approximately between 7°S to 70°S latitude and 40°E to 175°E longitude.
• Published by Geoscience Australia in consultation with other Commonwealth agencies like the Attorney-General's Department.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Column-level documentation is absent; field semantics must be inferred after download.
• Last updated 2026-06-23 03:46:25.049091; freshness should be verified.

Provenance

Source

Geoscience Australia, developed in consultation with the Attorney-General's Department, Department of Foreign Affairs and Trade, and the Australian Hydrographic Office.

Collection Method

Delineation of legal maritime limits and boundaries under Australian legislation and international treaties.

Time Range

Data reflects legislation and treaties as of August 2019, including the 2018 Timor Sea Treaty.

Freshness

Dataset currency is August 2019; platform record was last updated in 2026.

Geography

Australian marine jurisdiction including the mainland, offshore islands, and External Territories.