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  1. #1
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    Default What gps to buy for tech challenged farmer

    I have this friend who is as technologically challenged as I am when it come to gps's, and he has asked me to find one for him. So it the blind leading the blind here....

    He is a fencing contractor and he needs something simple or it wil go under the tractor wheel, no bells and whistles..
    What he needs is something to measure (in meters thats important) as he is walking/driving from one fence post to another, he wants to be able to mark on the gps where he is, start walking and the gps following his movement reading out the distance he has traveled, say 125m where he can drop in a fence post then reset the unit and go again.....
    My suggestion of an old school trundle wheel will probably get me under the other tractor wheel

    Gee I hope that made sense

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  3. #2
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    G'day Tracie, welcome to GPS Power. A standard GPS PND (Personal Navigation Device) of the type we deal with in this forum won't be accurate enough for that unfortunately. Even aviation devices used for precision instrument landing approaches don't get under 3 metres in some conditions and they have LAAS and WAAS augmentation.

    This rar file contains a PDF explaining it. It's to do with the problems of using a gps device for measuring a race course but the accuracy discussed is applicable to your friend's situation laying out a fence: [Only registered and activated users can see links. ]. Credits to the 'Smuttynose' website:
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    He'd be better off with a dumpy level to shoot a bearing and then measure conventionally between posts i'd reckon.
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  4. #3
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    oh wow, ok bugger.

    I thought there would be something out there that could show on a screen movement from A to B.
    I understand your dumpy idea, but I recon it would end up in the bottom of a fence hole....

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    He sounds like a really cranky bugger. Best find a new friend mate before he inserts you in a post hole [has to be head first, otherwise the arms get stuck .... or so i'm told. ]
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  6. #5
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    I know a guy working in Australia with these tractors, he even sent me some pics by whatsapp


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    Although our OP has mentioned 'farmer' in his description, his grumpy friend is really only wanting to accurately pinpoint holes for new fence posts because he's actually a fencing contractor. [It's an old joke in some Oz rural parts that fencers would prefer to describe themselves as farmers, sounds a bit more prestigious although some fencing contractors might also do a bit of small-lot farming on the side]. Most of the old-time fencers were a pretty rough lot, not above doing a bit of 'duffing' on the side either. Certainly the chooks weren't safe and you'd definitely hide the women-folk away from them.

    The precision gps guidence systems used by agricultural equipment for cultivating, planting, spraying and harvesting still rely on a correcting human hand on the wheel afaik anyway especially at paddock boundaries even though accuracy to within 5 cm [~2 inches] is technically possible, but this bloke only wants to precisely site his fence holes so can't see him outlaying mega-bucks for that kind of machinery-mounted kit.

    Great photo Caty, what part of AU is that?
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    I don't remember exactly, but must be somewhere in WA, Perth territory?
    From what he wrote he feels great In OZ I think he will never come back here.
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    Most don't go back permanently, who can blame them? It's not that it's so bad in EU, it's just that this is such a great country. You can get away from it all or live the mad-house metro existence if you want.

    Not too close to Perth i reckon, but outback WA looks much the same as outback Qld or NSW for that matter.
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  10. #9
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    At the moment he is using the odometer on his ute to guesstimate between 100m or 120m and so on. I was looking at the Garmin etrex 10, I was watching an old video on youtube of an old etrex showing after putting in a pin point and walking off it was showing how many meters he was walking away from his mark. I was wondering if anyone had any experience with these units???

  11. #10
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    Yep use em all the time M8 "but the best accuracy is 4 metres". eh if it's within the farmers boundary no probs but if it's a neighbors boundary then he could be 4 metres in the next door neighbors place." And the only instrument I know is within mm accuracy is a surveyors GPS system. $$$$$$$$$$ but a lot of farmers use normal GPS units. I have driven through many Farm/Station/Homestead etc places and My GPS shows me on the track but when I get home and load it back to the computer and zoom in I have been driving in the bush. Normally to the left of the road. So I don't know how long ya M8 has been a Fencer, but I guess he needs to spend some money to be even better at his job hey.
    Da Mags


    EDIT: Just had a thought "If the Farmer has pushed all the trees down and made a track for the fence and ya M8 wants to make a straight fence then I guess he can use any good GPS for that, for me I would still transfer to a paper map and say start/finish here then plot some points along that and say post here/here etc and see if it was still on the cleared track." but hey that's me.
    Last edited by Magnetron; 28th July 2016 at 12:11.
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