NESP A12: Northern Australian Estuary Habitats from Landsat Satellite Imagery

A report analyzing over three decades of Landsat satellite imagery from Digital Earth Australia to map and detect changes in coastal habitats across seven northern Australian estuaries. The work, part of the A12 Northern Seascapes Scoping Project, focuses on intertidal areas and mangroves critical for threatened and migratory shorebird species. The analysis employed tide-tagging and geometric median composites to overcome cloud interference and isolate tidal dynamics.

Use Cases

• Mapping intertidal extent and morphology based on the Intertidal Extent Model applied to Landsat imagery.
• Detecting coastal habitat change, such as mangrove expansion or dieback, using a multi-decade satellite time series.
• Analyzing the effects of tidal dynamics on intertidal habitats in regions with large and complex tides.
• Developing habitat monitoring tools by integrating Landsat with new satellite data streams like Sentinel-2.

Strengths

• Utilizes a three-decade long Landsat time series for change detection.
• Focuses on seven specific estuaries (Darwin Harbour, Keep, Daly, Roper, Macarthur, Flinders, and Gilbert River) known for important species habitats.
• Employs advanced methods like tide-tagging and geometric median composites to produce cloud-free, tide-corrected imagery.

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.
• The primary data format is PDF, which may limit direct computational analysis.

Provenance

Source

Australian Ocean Data Network via data_gov_au, as part of the NESP A12 Northern Seascapes Scoping Project.

Collection Method

Satellite remote sensing analysis using the Digital Earth Australia (DEA) platform and the Landsat archive.

Time Range

Likely spans over 30 years, based on the 'three decade long Landsat time series' mentioned.

Freshness

Last updated 2026-06-27 18:17:43.760546; freshness should be verified.

Geography

Seven estuaries in northern Australia: Darwin Harbour, Keep, Daly, Roper, Macarthur, Flinders, and Gilbert River estuaries.