Depth contours at multiple intervals of the Australian 250m 2024 bathymetry grid (AusBathyTopo)

This dataset comprises derived bathymetric isobaths (depth contour lines) generated from the Geoscience Australia (GA) AusBathyTopo 250m 2024 gridded bathymetric dataset (https://dx.doi.org/10.26186/150050). The AusBathyTopo 250m grid provides a high-resolution terrain model for Australia, covering ocean and land areas from 92°E to 172°E and 8°S to 60°S at a resolution of 250 metres. The bathymetric contours are clipped to the boundaries of the Australian Exclusive Economic Zone (EEZ: https://amsis-geoscience-au.hub.arcgis.com/datasets/geoscience-au::exclusive-economic-zone-limits/about), and includes all regions including and below Mean Sea Level (MSL).

Four contour datasets are provided:

1. 100 m intervals: full EEZ coverage.
2. 5 m intervals: shallow regions between 0–200 m depth (nominally the Australian continental shelf and shallow oceanic features).
3. 1 m intervals: shallow regions between 0–200 m depth.
4. Composite product: Multi-resolution contours with full EEZ coverage, including: • 2 m intervals for depths 0–30 m. • 5 m intervals for depths 30–100 m. • 10 m intervals for depths 100–200 m. • 50 m intervals for depths 200–2,000 m. • 100 m intervals for depths 2,000–8,000 m.

These contour datasets are intended for use in marine spatial planning, mapping visualisation, and broad-scale analysis. Due to the smoothing procedures applied during their creation the are not suitable for engineering or high-precision applications.

The contours presented through the Web Mapping Services (WMS) linked to this record are optimised for visualisation purposes and have been simplified using a tolerance of 10 meters for efficient rendering in mapping applications. For users requiring full-resolution data, the download packages include the original, unsimplified contour products.