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Old 17 July 2013, 17:47   #11
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This sort of thing has always interested me, especially when integrated into some form of crowd sourcing system where poorly charted areas eventually get fully covered and are kept up to date. Keep it up!
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Old 18 July 2013, 03:15   #12
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This sort of thing has always interested me, especially when integrated into some form of crowd sourcing system where poorly charted areas eventually get fully covered and are kept up to date. Keep it up!
A bit like this?


(I have to record the height of the tide)
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Old 18 July 2013, 04:40   #13
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Yeah, cool. Now all you've got to do is a load more passes to the left and right of your track to cover the other bits!
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Old 18 July 2013, 04:53   #14
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This sort of thing has always interested me, especially when integrated into some form of crowd sourcing system where poorly charted areas eventually get fully covered and are kept up to date. Keep it up!
Olex has been around a long time & does exactly this, it's a commercial product & ain't cheap, a full system is about 10 grand It is VERY impressive though. Users upload their data & share it with other users, the result is that you get very detailed topographical maps of the sea floor, as long as you're in an area that's been well covered. I've seen it in operation on dive boats combined with a multibeam sonar & the detail is incredible.
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Old 18 July 2013, 04:59   #15
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Coolest thing I have seen on this site.... As it's home made and works.
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Old 18 July 2013, 08:22   #16
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+1

You know how everyone moans about no decent electronic charts of places like Loch Lomond etc......
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Old 28 July 2013, 07:03   #17
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What's wrong with a plumb line for Loch Lomond? I seem to remember the AA missing it out of their maps completely!

(By losing the LCD I've got it into a smaller case now).


And the speed plots more neatly...
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Old 28 July 2013, 09:35   #18
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Originally Posted by gotchiguy View Post
This is quite neat, good job

I have been looking for a cheap accelerometer for a while, it would be very interesting to see what G we pull when going along, especially after the I think 10,000 recordings of 10G+ on day 1 of the Venture Cup that Cinzano recorded!

Anyone know of a cheap & simple one?
It depends on your definition of simple, but this one is cheap and works very well:

SparkFun Evaluation Board - ADXL345 (SEN-09814) | Proto-PIC.co.uk
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Old 10 August 2013, 03:19   #19
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This sort of thing has always interested me, especially when integrated into some form of crowd sourcing system where poorly charted areas eventually get fully covered and are kept up to date. Keep it up!
A nice build!
There are some folk doing exactly that - providing nmea data loggers free in certain circumstances- then processing the depth,position and time information for tidal correction: averaging etc, in order produce crowdsourced charts, Kal overlays etc
Free to join

http://www.teamsurv.eu/

(I'm not affiliated, just interested)

It's always nicer to do it yourself though!
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