Time and tide. Mapping the changing 3D shape of Australia’s coastline using p
summary
Digital Earth Australia Intertidal generates yearly coastal elevation models from Landsat and Sentinel-2 stacks using Open Data Cube and DEA Tools, plus a new EO Tides Python package for per-image tide heights, and can map 2016–today at fine scale. The method reduces imagery needs, achieves about 30 cm vertical accuracy where tidal ranges are large (works poorly on steep, wave‑dominated beaches), produces time series for volume differencing, and supports optical‑flow vectors to track multi‑kilometre sandbank movement. Data and code are open.
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chapters (14)
- 0:00Introduction to coastline mapping
- 1:04Digital Earth Australia overview
- 3:31Intertidal zone challenges
- 5:15New elevation modeling method
- 6:39Improved coastline detail
- 7:21Validation with aerial lidar
- 8:24Model accuracy and limitations
- 9:46Tracking coastal change over time
- 10:51Sediment movement analysis
- 11:57Optical flow for sediment tracking
- 13:41Global application with Open Data Cube
- 14:44Open source tools and packages
- 15:46EO Tides package demo
- 16:32Q&A on sea level rise and lidar
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