01 Australian bathymetry
Australia,
below the waterline.
One continuous view of the continent’s submerged terrain—national coverage, regional survey detail and the deep ocean beyond.
Try Perth Canyon, Sydney Harbour, or −16.9, 145.7
A map, not a mosaic
The coast does not stop
where one survey ends.
Bathy resolves the best available source at every scale, without asking you to know which dataset covers the patch of water you are looking at.
Explore the mapGeometry first
Real depth,
at the right scale.
Rendered colour is never mistaken for measured depth. Bathy keeps the elevation grid underneath the image all the way to the map. Every tile shows: a continuous colour ramp from shoreline to abyss, drawn depth contours at real intervals, hillshaded relief lit from the same elevation data as the colour, and an optional 3D mode that tilts the seabed into real terrain — all from one grid, so the picture and the numbers can never disagree.
- 01
Local surveys & harbour-scale bathymetry
Multibeam and LiDAR surveys down to 0.5m, baked in where governments and agencies have published them — WA, NSW, Victoria, Darwin Harbour and more, growing over time.
- 02
AusSeabed regional surveys
High-resolution multibeam and LiDAR compilations where they exist: reefs, harbours, channels and shelf edges, live from AusSeabed's own catalogue.
- 03
AusBathyTopo & EEZ composite
Geoscience Australia's continuous national bathymetry grid, layered under a finer 10m compilation of the whole coastal shelf where a local survey doesn't yet exist.
- 04
GEBCO ocean floor
Global numeric elevation continues beyond the continental shelf, so the picture never ends at a data boundary.
From country to bommie
Zoom changes detail.
Not the map.
Begin with Australia in one frame. Move toward any coast and Bathy automatically resolves the finest published survey available for that location.
- 01Continuous national base
- 02Regional surveys resolve in place
- 03Depth-accurate terrain geometry
- 04Attribution shown tile by tile
The entire Australian coastline
Find the shape
under the surface.
Open Bathy
Before you sound out
Frequently asked.
01Can I navigate with Bathy?
No. Bathy is a visualisation and exploration tool, not a substitute for official nautical charts or navigational aids.
02Where does the depth data come from?
Geoscience Australia’s AusBathyTopo grid, higher-resolution AusSeabed regional surveys, and the GEBCO global elevation grid.
03Is it free?
Yes. The public map is free to explore and requires no account.
04How current is the data?
Bathy follows the latest published compilations and refreshes as new national and regional surveys are released.