Bathymetric survey

For spatial and modelling information underwater, Diospatial’s bathymetric survey solutions provide engineers with important terrain modelling data and accurate survey to support assessment and design works.

Our bathymetric surveys are an integral part of our complete topographic survey solutions. Using unmanned marine drones, the terrain underwater is captured to produce a spatially accurate and geolocated topographic model. This can then be used to understand the current topography and changes over time to inform engineering assessment, design and planning.

When combined with Diospatial’s drone lidar surveys above the water, the complete topography of the land above and below the water can be mapped and combined to provide a complete picture for engineers and asset owners.

WHAT IS A BATHYMETRIC SURVEY?

A bathymetric survey is a survey of the terrain beneath water. Using echo-sounder technology from a marine drone, the returns are measured and geospatially mapped to produce an accurate terrain model beneath the water.

At Diospatial, we work with your team to understand the specific application and then develop the most effective methodology. Whether that is simply a bathymetric survey, or a combination of other reality capture technologies like drone LiDAR and laser scanning.

how does BATHYMETRIC SURVEY work?

Hydrographic survey works by using an unmanned marine drone that is operated from the shoreline, or a nearby vessel.

Using a single-beam echo sounder, the drone surveys the underwater terrain from the water surface. Combined with GNSS and IMU sensor, the accurate position and altitude of the drone is captured, taking in to consideration sway and movement from the water surface.

The data is then processed to produce a point cloud, which is then used to produce a terrain model and extract further topographic information including contours.

To find out more about how bathymetric surveys work, visit Geoscience Australia.