Derived data product DEA Coastlines

  • Track coastal change since 1988

  • Monitor more than 33,000 km of coast

  • Explore on a map or download

Colourful lines with annual dates curve around a coastline image

See decades of coastal change

A groundbreaking data product, DEA Coastlines combines satellite data with tidal modelling to map the typical location of the Australian coastline at mean sea level for every year since 1988. Resulting shorelines and detailed rates of change show how beaches, sandspits, river mouths, and tidal flats have grown and eroded over time

Woman with hat and backpack walks away on an orange coastal rock shelf

The product draws on nearly 58,000 independent measurements to ensure accuracy, supported by local councils, state governments, citizen scientists and academia

Aerial view of red unit blocks on edge of a beach with clear blue water

Coastline data is accurate down to 10 m — showing change as small as 2.9 m in some locations

Why track changing coastlines?

  • Provide new insights to scientists, coastal managers, local communities and policymakers

  • Model how coastlines respond to drivers of change, including extreme weather events, sea level rise and urban development

  • Prioritise and evaluate impacts of local and regional coastal management decisions

  • Support research into how and why coastlines have changed over time

DEA Coastlines interactive map

Visit DEA Maps to get the full interactive map with DEA Coastlines and other DEA products.

Colourful sand spit seen from aerial view through turquoise ocean

Imagery for impact The growing sands of Twilight Cove

Get a snapshot of the stories revealed by DEA Coastlines, including how one remote and spectacular Western Australian beach has grown by more than 500 m since 1988.

Related resources

Smiling man with glasses stands in front of beach and looks to camera

Seminar: Time and Tide

Meet Digital Earth Australia’s Dr Robbi Bishop-Taylor in this seminar on mapping Australia's coastal zone through time and space with DEA data.

Seminar: Time and Tide Watch now
Red and blue dots along a coastline with change marked in metres

Seminar: The evolution of DEA Coastlines

Head of the DEA Aquatic Product Development team, Dr Stephen Sagar, gives a preview into the development of the DEA Coastlines dataset.

Seminar: The evolution of DEA Coastlines Watch now
Map showing coastal change at Streaky Bay, SA

Journal Article

Mapping Australia's dynamic coastline at mean sea level using three decades of Landsat imagery

Journal Article Read the paper