Coastal and Ocean Resources

Coastal Image Processing & Digital Elevation Modeling

We generate digital elevation shoreline models.

Recent advances in rapid digital image acquisition and computer processing now allow 3-dimensional structures to be generated from 2-dimensional image sequences acquired from moving platforms. The process is called Structure from Motion (SfM). Most of the SfM research to date on coastal applications has used vertical aerial imagery. Coastal and Ocean Resources has adapted these techniques for use with the oblique aerial imagery acquired during ShoreZone surveys. The resulting 3-dimensional view of the shoreline can be combined with LIDAR and draped with the original photograph. This image stack is a virtual representation of the actual shoreline and is useful for ground truthing, flood inundations estimates, and quantitative estimates of shoreline erosion or accretion. Below is an example from the Barren Islands, Alaska.