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You do not say what resolution of data you are looking for. The obvious place to look for UK data is the OS, our national mapping agency! They now offer free data called OS Terrain 50. I you are looking for higher resolution data for the UK and have money to spend then I suggest you look at NEXTMap


What type of habitats need to be typed? BioBase (www.cibiobase.com) generates GIS grid (kriging) outputs (depth, submerged vegetation, and bottom hardness) for the downlooking 200 khz broadband channel which is often recorded in .sl2 files. If the investigator can navigate over the area of interest, BioBase will automate the processing of high resolution ...

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