Welcome guest, is this your first visit?
Member
Discoveries
 
Results 1 to 11 of 11
Like Tree2Likes
  • 1 Post By TerryC
  • 1 Post By mts

Thread: Is there an GPS unit that will get me within 10 feet of a site?

« Prev Thread | Next Thread »
  1. #1
    us
    Oct 2010
    407
    10 times
    All Types Of Treasure Hunting

    Is there an GPS unit that will get me within 10 feet of a site?

    I have a Garmin GPS40 and it tells me when I get from 175 feet to 1000 feet from my preset waypoint.
    I need something alot more accurate.
    Any ideas?

  2. #2
    us
    Come out from under your bed today...... DO SOMETHING!

    Jun 2008
    Yarnell,AZ and Titusville,FL
    Right now: Garrett GTA 500, ACE 250, Fisher Impulse 8, Gold Bug 2, Whites GMT, Vibraprobe 570, and Falcon MD20
    4,337
    1651 times
    Coinshooting, Gold prospecting, and Nuggetshooting
    Honorable Mentions (1)

    Re: Is there an GPS unit that will get me within 10 feet of a site?

    Quote Originally Posted by goverton
    I have a Garmin GPS40 and it tells me when I get from 175 feet to 1000 feet from my preset waypoint.
    I need something alot more accurate.
    Any ideas?
    Gov, Most GPS's, by design, will get you to within 10 meters (30 ft) of the marked waypoint. Without your unit in front of me, I will say that 175/1000 feet only represents your "ARRIVING AT" function. Keep moving torwards the waypoint and the message should change to "ARRIVED AT" waypoint. You may also have a window on there that tells the accuracy.... and that number will get smaller as more satellites are tracked. The commercial units used for highway construction and such, are MUCH more accurate. You can pay about $20,000 for a unit that will accurately place you to within a fraction of a millimeter of where you want to be. 10 meters is close enough for me! TTC
    Bum Luck likes this.
    ONE MIND - ANY WEAPON

  3. #3
    us
    Nov 2006
    Vicksburg, MS
    Geonics EM61-MK2 or Minelabs F3
    68
    3 times

    Re: Is there an GPS unit that will get me within 10 feet of a site?

    Assuming that you live in the USA and specifically the southern portion of the continental USA, any GPS receiver that has Wide Area Augmentation System (WAAS) capability and can see one of the two satellites should get you better than 3m. If you are near an airport you may get 1m accuracy.
    Ryan E. North
    Research Geophysicist

  4. #4
    mts
    mts is offline
    us
    May 2009
    Tesoro Vaquero, Tesoro Silver µMax, BH Tracker IV, Garrett ProPointer
    1,179
    5 times

    Re: Is there an GPS unit that will get me within 10 feet of a site?

    I don't know why the Garmin GPS40 doesn't work well for you. It seems to me like it should.

    I tried using a car GPS unit for locating waypoints and I found out that the common car GPS chipsets have a mode which is enabled by default to purposely stop sending coordinate updates when the velocity of the unit gets below a certain point. This is to keep from sending tons of data while the car is essentially sitting still. If you hold a car GPS and walk around slowly, you will not get very good results because you are moving at too slow of a speed so it doesn't update your position. If you start jogging or running instead you will often find that the GPS kicks in again and you can get very close to the standard 30 foot resolution claimed by most GPS devices.

    The handheld hiking GPS units should have this mode turned off so that you get constant updates to your current coordinates. But perhaps this unit is the exception. If you walk very slowly does the unit still update your position or do you need to travel at a higher rate of speed to see updates occur?
    dandut46 likes this.

  5. #5
    us
    Oct 2010
    407
    10 times
    All Types Of Treasure Hunting

    Re: Is there an GPS unit that will get me within 10 feet of a site?

    Quote Originally Posted by mts
    I don't know why the Garmin GPS40 doesn't work well for you. It seems to me like it should.

    I tried using a car GPS unit for locating waypoints and I found out that the common car GPS chipsets have a mode which is enabled by default to purposely stop sending coordinate updates when the velocity of the unit gets below a certain point. This is to keep from sending tons of data while the car is essentially sitting still. If you hold a car GPS and walk around slowly, you will not get very good results because you are moving at too slow of a speed so it doesn't update your position. If you start jogging or running instead you will often find that the GPS kicks in again and you can get very close to the standard 30 foot resolution claimed by most GPS devices.

    The handheld hiking GPS units should have this mode turned off so that you get constant updates to your current coordinates. But perhaps this unit is the exception. If you walk very slowly does the unit still update your position or do you need to travel at a higher rate of speed to see updates occur?
    I have run test with this GPS device and it warns me of approaching waypoint within a 75 yards and then lets me walk right past waypoint before it says I am there.
    What I am doing is pre-programing waypoints I want to "visit" when I go to my TH spots. I need it to get me closer than it seems
    to when I am testing it out at home( walking moderate pace, stop, mark Waypoint, save and name it. Continue walking a large 1/2 miles circle and when in sight of known waypoint, ask GPS to take me to that waypoint)

  6. #6
    us
    My Find of a Lifetime!

    Oct 2006
    Philadelphia Area
    White's V3i Excalibur 1000, Teknetics T2 SE
    5,067
    253 times
    Banner Finds (1)
    Honorable Mentions (2)

    Re: Is there an GPS unit that will get me within 10 feet of a site?

    I have found cellar holes by overlaying old maps onto Google Earth and then entering the coordinates on my GPS. I have done it with two entry level units, a Garmin and a Magellan, and both led me right to the cellar holes in the woods. They should be accurate within 20 ft.


  7. #7
    us
    Apr 2006
    northeast Wisconsin
    Fisher CZ3D, BH Discovery 3300
    883
    7 times

    Re: Is there an GPS unit that will get me within 10 feet of a site?

    A simple search for "north america civilian gps accuracy" gave me this:

    http://geocode4pros.com/gps_overview.htm

    a reasonable explanation, that is only 3 years old (i.e. should still reflect current technology)

    Diggem'

    Yup. The end of a way of life. Too bad. It's a good way. Wagons forward! Yo!

  8. #8

    Apr 2007
    8
    I have a Garmin Oregon 450 and it is usually accurate to 10 or 11 feet here in MN. One time in MT it took me on top of the pile I was looking for. I mean 0 foot accuracy that time.

  9. #9
    aq
    Mar 2012
    278
    26 times
    All Types Of Treasure Hunting
    I found this website, but dont know anything about it... Expert GPS It states the software will unlock hidden secrets of the gps40.

    I had an unit like this one years ago, I built the datalink for the back to hook it up to a computer, and that worked very well in sorting out what the unit could do, setting waypoints, and routes was much easier....I see that the data cable is very cheap now, and is worth it.

    I see the unit for sale here at $40... GPS40 but I am more interested in their shipping department!

    Name:  gar4.jpg
Views: 603
Size:  9.0 KB

  10. #10
    us
    Jan 2013
    Roswell, New Mexico
    Garrett GTI 2500 BH Elite 2200
    185
    80 times
    All Types Of Treasure Hunting
    I used to do surveying with AutoCAD, I have a sportak pro WAAS <3m accurcay 95% of the time. I have brought my GPS within 1 foot of a given point. What you do:

    Obtain coordinates of a horizontal control point (NGS WEBSITE) make sure your Datum matches the one on the datasheet (and WAAS is turned on!). Add the benchmarks coordinates from the datasheet to your GPS, then hit "GO" make your way to the benchmark and let it sit on the benchmark for at least 10 minutes. Your GPS will give you a distance to your benchmark. Mine showed the benchmark 1 foot away and the elevation was dead on. GPS will get more accurate in a year or two with the new blocks of GPS birds they are launching.

  11. #11
    us
    May 2008
    Wisconsin
    GARRETT GTI 2500, Garrett Infinium
    2,935
    578 times
    All Types Of Treasure Hunting
    All the above are good posts.
    "A casual stroll through the lunatic asylum shows that faith does not prove anything." — Friedrich Nietzsche

    "You ask where I live. I cannot tell you. I am a Voyageur, a Chicot, sir. I live everywhere. My grandfather was a voyageur; he died while on a voyage. My father was a voyageur; he died while on a voyage. I will also die while en route, and another Chicot will take my place. Such is our course of life."

 

 

Home | Forum | Active Topics | What's New

Sponsors

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Search tags for this page

geonics em 61

,

geonics em-61

,

gps accuracy within 10 feet

,

gps devices that are accurate within 10 feet

,
gps unit accurate to within 2 feet
,

gps unit within a foot

,
gps within 10 feetr
,

how close can gps get

,

how close does gps get

,

philadelphia bad data cabling pictures

Click on a term to search for related topics.
Powered by vBadvanced CMPS v4.1.3