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Accuracy to 1 meter??

dmq400 0 Points
in GPS Recommendations
HI - Brand new here and trying to catch up on the technology....and a bit lost. I read accuracy of waypoints is slowly becoming cost effective for a handheld device and need to know if its here....and any recommendations.
We have a specialized plant nursery with over 500 plants (waypoints?) that are planted in a 3' x 4' grid. Hardest part of this is keeping track of the names of the cultivars. Are there hand held devices out there that can give me 500 named waypoints and is accurate to about 3 ft? Thanks for the help

Comments

  • sussamb 813 Points
    Not consumer ones, professional ones would but they cost in the thousands.
  • dmq400 0 Points
    Thanks for that info. Would you have a name of a "professional" one? Would like to make the inquiry..a couple of thou might be doable.
  • Tim 1480 Points
    Trimble makes professional level GPS devices:
    https://geospatial.trimble.com/

    I recall that something like this is in the $8k range:
    https://geospatial.trimble.com/products-and-solutions/geo-7x-gnss
  • Boyd 1985 Points
    edited June 11
    I suspect that more traditional methods are still the way to handle this. With the pro-grade devices, you also have pro software that isn't as user-friendly as a consumer GPS.

    In the consumer space, there are a few products with enhanced accuracy, but I don't think they would be reliable enough. The Bad Elf Surveyor claims 1-meter accuracy

    https://bad-elf.com/pages/be-gps-3300-detail

    ...but then read the fine print, LOL

    "In ideal conditiions, unobstructed view, with SBAS lock, device allowed to settle for at least 2 minutes" :D

    And then notice that 2.5-meter accuracy is typical. You can get that with the Garmin GLO for hundreds of dollars less.

    https://buy.garmin.com/en-US/US/p/645104

    I wrote about it here: http://forums.gpsreview.net/discussion/30108/what-is-gps-accuracy-testing-the-garmin-glo-in-the-forest

    and in this old review: https://gpstracklog.com/2013/04/garmin-glo-review.html

    I doubt that the GLO is accurate enough for your application however. But the nice thing about bluetooth receivers is that they can work with hundreds of apps on iOS and Android phones and tablets. SXblue makes some very accurate bluetooth devices. But I think you're getting into thousands of dollars again..

    https://sxbluegps.com/products/gps-gnss-receivers/
  • dmq400 0 Points
    Hmmm.. Ok and thanks. Sounds like the technology is not there yet for us nurseryman
  • alanb 539 Points
    I suspect a grid numbering system, a few cheap tags, and a simple database app on your smartphone would be a simpler, more reliable and much cheaper way to go. ;)
  • dmq400 0 Points
    Oh...you know so little about the nuts and bolts of managing 300 plus individual plants that are cut down to the ground every season, where stakes are heaved up and out during the winter, customers too lazy to bend over to read them and insist on pulling them out to read, where semi mechanized weeding machines have trouble avoiding, thus breaking the markers, much less fading writing markers that claim to be permanent and plants that refuse to stay in a perfect grid alignment over the years. More?
  • dhn 336 Points
    Somewhat patronizing response to someone just trying to help in my opinion.
  • Boyd 1985 Points
    Seems like he was just providing some insight into the problems of managing his business.
  • dmq400 0 Points
    No...meant to put a smiley face on my issues...and to note how things are much more complicated for the professional then this non-professional (nurseryman) thinks. A teeny bit miffed however thinking that I never thought out or tried "tags and a paper grid to work this out.
  • Boyd 1985 Points
    You might want to look into the technologies used for indoor positioning systems. Of course, you are not inside a building, but these systems can provide high accuracy in a controlled environment. Not a subject that I know anything about myself though. :)

    https://en.wikipedia.org/wiki/Indoor_positioning_system
  • alanb 539 Points
    @dmq400 …
    Sorry, I didn't mean to offend. You are right, I know nothing about your business, so I should have just not posted rather than making a useless suggestion. I hope you can find something that works.
  • Boyd 1985 Points
    BTW, I should add that the OP's topic of "accuracy to 1 meter" doesn't really describe a device that would fit his needs. You would need sub-meter accuracy to positively identify objects in a 3'x4' grid.

    "1 meter accuracy" is generally taken to mean +/- one meter. So, if you mark a waypoint and then return to it later, you would expect to be somewhere inside a one-meter radius (2-meter diameter) circle centered on the original point. Your plants are too close together to be uniquely identified at that resolution. And it's even worse that that, because "1 meter accuracy" doesn't really mean "1-meter accuracy"... there's some "fine print" associated with that specification along the lines of "1-meter accuracy 75% of the time". If that was the actual spec, then 25% of the time you could be sent someplace wildly wrong.

    We discussed that in the accuracy thread I mentioned above, see Tim's comment here: http://forums.gpsreview.net/discussion/comment/202390/#Comment_202390

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