As described in the manuscript entitled "Limitations of predicting substrate
classes on a sedimentary complex but morphologically simple seabed" remotely
sensed variables and ground truth samples were distributed as part of a seabed
mapping exercise. This holding contains the four raster layers provided to all
participants for the East of Haig Fras MCZ and the groundtruth samples. These
four rasters are: Multibeam echosounder bathymetry, multibeam echosounder
backscatter, modelled maximum current velocity at the seabed and modelled mean
current velocity at the seabed. All rasters are in UTM29N projection at a 2 m
x 2 m resolution. The groundtruth samples were derived from drop camera still
images of rock substrate and sediment substrate samples were derived from
grabs classified using Particle Size Analysis. Groundtruth samples contain the
field "Test". Test values of 0 were used to train the models and values of 1
were withheld from all analysts as an independent test set.
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