Flood Risk Assessment

Council staff utilise 3D datasets for engineering planning, design and community consultation. These 3D datasets contain information about the height and location of features. In this case, the data is for use in a flood model around a town in rural New South Wales.

AAM collected a 3D terrain dataset for the council using an aerial laser sensor (known as LiDAR or Aerial Laser Scanning). This new 3D terrain dataset measured terrain height at more than 44 million sites in and around the town. The density of the measurements can be seen in the image below.

Engineers and Planners will be able to use this particular dataset knowing any measurements made will be within +/-15cm of their true position on open flat ground in 70% of cases. The statistical analysis to confirm this accuracy is calculated using all measurements taken over the entire project area.

This new aerial laser survey work had some benefits over land survey as the density of measurements was very high and the delivery of products rapid by comparison.

Aerial laser surveys can be undertaken to achieve a range of accuracies: better than +/-10cm vertical accuracy to 25cm or 50cm.

We deliver the terrain data to the accuracy your project requires.

For more LiDAR case studies, visit our webpage here.