Ebb-tidal delta at Raglan Bar on New Zealand’s North Island
Detailed Description
Arrows show average migration of sand bars over 5 years in the ebb-tidal delta at Raglan Bar on New Zealand’s North Island. Scientists produced the map by analyzing “time-averaged images” derived from video collected from 2010 to 2015. A time-averaged image is made by averaging light intensities recorded at each pixel in each frame of a video; see example. (Figure 10a in 2017 Marine Geology paper)