Exegesis Spatial Data Management

 

Posts in Category: Aerial survey

Wales bait digging survey

Bait digging is a particular issue on certain shores in Wales, especially where the volume of digging is causing long term changes and damage to the habitat. Natural Resources Wales (NRW) wanted to investigate ways of assessing and monitoring this impact.

The aim of the project was to establish the suitability of aerial imagery taken from Unmanned Aerial Vehicles (UAV) to investigate the spatial and temporal extent of bait digging at selected sites in Wales.

Sites were flown at low tides and ortho-rectified seamless mosaics produced. Shore survey and ground truthing was also undertaken, and control holes dug to investigate the persistence of bait digging evidence on different shores. The shores were revisited to assess whether the control holes were still visible, to give an indication of the persistence of damage. The ortho-rectified imagery was used to create bait digging intensity maps on a variety of shore types.

Bait digging
Bait digging at low tide

We also investigated the potential to use localised terrain models to help identify areas of bait digging.

See our air survey pages for our air survey capabilities.

Peatbog restoration surveys

The demand for aerial surveys of upland and lowland peat bogs has never been higher than over the past 2 years.  We are well into the main survey season now and so our eBee Plus RTK fixed wing drone is being used to survey a range of sites across the country.

Lowland peat bog
Lowland peat bog undergoing restoration work

We are also increasingly being asked to create fly-by videos at the same time as the vertical surveys using our multi-rotor drone.  These videos are excellent for giving an overview of the sites or for use in public consultations, helping to make sense of the habitat and site features within the landscape.  Further details can be found on our air survey pages.

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