Malc Posted August 3, 2023 Share Posted August 3, 2023 Basically, what are the lines? They are between rocky areas and will be sand or mud but why lined? Thanks for relevant answers, up yours for leg pullers 😁 Quote Link to comment Share on other sites More sharing options...
Andy135 Posted August 3, 2023 Share Posted August 3, 2023 Nature generally doesn't produce dead straight lines, so my working assumption is that they are sonar data artifacts/discrepancies produced by differing sea conditions as the survey ship passed over that swathe of sea floor. I've seen lines like that on other sea floor maps e.g. the DORIS project. Other possibility could be tram lines left by beam trawlers, but I wouldn't expect these to start over rocky ground as the gear would get snagged. Malc 1 Quote Link to comment Share on other sites More sharing options...
Andy135 Posted August 3, 2023 Share Posted August 3, 2023 2 hours ago, Malc said: up yours for leg pullers 😁 @JonC take note. You have been warned... Quote Link to comment Share on other sites More sharing options...
Saintly Fish Posted August 3, 2023 Share Posted August 3, 2023 I reckon it's something to do with the way the water deflects off the rocks as the tide flows. they are not dead straight lines, but how they get there I have no idea! Malc 1 Quote Link to comment Share on other sites More sharing options...
Captain Sensible Posted September 12, 2023 Share Posted September 12, 2023 Only time I’ve heard same comment of nature not producing straight lines was about Vietnam war and booby traps left for US soldiers. People who set the traps marked them with horizontal sticks up high which, if you’re used to jungle environment sticks out like a sore thumb Anyway I digress, with Navionics has anyone noticed a deterioration in the lower zoom quality since the relief shading ‘upgrade’ I think bag-o-shite and others have said same. Upgrade took away a couple of options to use different colours on lower zoom, think they’ve fixed the crashing bug if no phone signal Quote Link to comment Share on other sites More sharing options...
Odyssey Posted September 15, 2023 Share Posted September 15, 2023 Erm the charts are not thst accurate, they are a computer interpolation on the data which then is used to produce a rendered image of the bottom…. So basically the simulation data will have some parts that are a guess, hence the straight lines… Malc 1 Quote Link to comment Share on other sites More sharing options...
Saintly Fish Posted September 15, 2023 Share Posted September 15, 2023 25 minutes ago, Odyssey said: they are a computer interpolation That's why then, if it were an interpretation it'd look clearer!! Quote Link to comment Share on other sites More sharing options...
Malc Posted September 15, 2023 Author Share Posted September 15, 2023 Strangely enough to the north and south of the Tyne there are two areas that are heavily fished and these areas have great shading, however the sandy bits between where people are hitting warp speed are just bland looking with no features, but if I kayak over it I am sure that I would find a feature or two worthy of a dangle. Quote Link to comment Share on other sites More sharing options...
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