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What is the most accurate GPS device?
9-29-05
| delphinium
Posted on 09/29/2005 9:40:54 AM PDT by Delphinium
I know this is a personal matter but I am waiting for Garmin tech support to answer. I am wanting to buy a GPS device that is accurate atleast to 2 meters.
I know there are many high tech and high intellectual folks of Freerepublic, so I decided to ask.
TOPICS: Your Opinion/Questions
KEYWORDS: garmin; gotlostonwaytochat; gps
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To: F15Eagle
I hear the new Blackberry 8700, due to be released later this year, will have GPS on board.
21
posted on
09/29/2005 9:49:36 AM PDT
by
Solson
(I've got eyes in the back of my head.)
To: TChris
The more satellites it receives at once, the more accurate, up to a point. AFAIK, the best you get with GPS is about 15 ft (5 meters) accuracy There are differences in accuracy, and differences in applications. A set designed for a fighter has to track more channels because things change rather quickly in a fighter aircraft. There are also differences in the algorithms implemented in various devices. The way they "track" the signal from the satellites varies. That mainly affects how well they maintain "lock" under low signal conditions, but it also affect accuracy. For the most precise uses, you have to go to differential. That takes an additional set located at a known point. There are also ways to get more accurate positions relative to some nearby point, without the extra set. Thus the position might be off by a meter or two, but relative to a post on the corner of your field or block, you might be good to centimeters.
22
posted on
09/29/2005 9:49:39 AM PDT
by
El Gato
To: Delphinium
23
posted on
09/29/2005 9:49:51 AM PDT
by
Realism
(Some believe that the facts-of-life are open to debate.....)
To: Redcloak
I don't know much about current civilian GPS products but I do know that nowadays high-tech electronics from pc's to televisions and their accessories can become obsolete within a year and replaced on the market by more advanced, cheaper products. I would check out Wal-Mart unless you are a surveyor or a cartographer.
24
posted on
09/29/2005 9:50:18 AM PDT
by
Brad from Tennessee
(Anything a politician gives you he has first stolen from you)
Comment #25 Removed by Moderator
To: Delphinium
The one that flashes "You are here"
26
posted on
09/29/2005 9:51:06 AM PDT
by
john316
(JOSHUA 24:15 ...choose you this day whom ye will serve...)
To: Red Badger
Ha ha, can't get away from her can you?
27
posted on
09/29/2005 9:51:27 AM PDT
by
Rebelbase
(New Orleans rebuild by Mexican Labor will produce crawfish tacos and menuedo-gumbo.)
To: Delphinium
Roughly speaking:
Recreational grade:
10 meter accuracy $200
Mapping grade:
1 meter accuracy $5000
Sub-meter accuracy $10,000
Survey grade:
0.1 meter accuracy $20,000
28
posted on
09/29/2005 9:51:32 AM PDT
by
SuperSonic
(Don't just complain. Do something productive!)
To: CAWats
Don't laugh. But check out Radio Shack.
29
posted on
09/29/2005 9:51:47 AM PDT
by
durasell
To: TChris
If you buy a modern GPS receiver, the accuracy will have nothing at all to do with which one you use.That will come as a surprise to us surveyors who have been using GPS for over 20 years with X/Y/Z accuracies of 1/4 inch.
30
posted on
09/29/2005 9:52:23 AM PDT
by
Publius6961
(Liberal level playing field: If the Islamics win we are their slaves..if we win they are our equals.)
To: stuartcr
19"?..........heh heh heh.............Hey, sailor........
31
posted on
09/29/2005 9:52:39 AM PDT
by
Red Badger
(In life, you don't get what you deserve. You get what you settle for...........)
To: Delphinium
Related to this topic: Has anyone used a GPS to get a close estimate of the location of a tract of land? I own a remote 40 acre tract where I can identify one corner (survey marker) but due to steep hills the other 3 corners are difficult to identify.
To: SuperSonic
Ex-Wife Grade: Priceless!.......
33
posted on
09/29/2005 9:53:30 AM PDT
by
Red Badger
(In life, you don't get what you deserve. You get what you settle for...........)
To: Delphinium
A land surveyor I did some work for, swore by his Trimble unit, but it cost him about $15 grand, four years ago. Accurate to within an inch, when the government took off the dithering circuit it employs during heightened security.
34
posted on
09/29/2005 9:54:08 AM PDT
by
aShepard
To: El Gato
For the most precise uses, you have to go to differential. That takes an additional set located at a known point. OK, but that's not just GPS any more, is it?
35
posted on
09/29/2005 9:54:43 AM PDT
by
TChris
("The central issue is America's credibility and will to prevail" - Goh Chok Tong)
To: durasell
Don't laugh. But check out Radio Shack.
I almost laughed. Almost.
36
posted on
09/29/2005 9:54:56 AM PDT
by
reagan_fanatic
(Darwinism is a belief in the meaninglessness of existence - R. Kirk)
To: Delphinium
I use a map and a compass. No batteries needed.
37
posted on
09/29/2005 9:55:34 AM PDT
by
Conspiracy Guy
(Ponce de Leon is coming here to look for the fountain of dumb. The DNC is his first stop.)
To: Captain Jack Aubrey
This is a 12 channel WAAS mounted unit on a 42 ft sailboat.
-----
The most accurate GPS service (code) available to the non-military user, will utilize a WAAS satellite for error correction information. If you need the ultimate, buy a good 12-channel system with WAAS capability.
38
posted on
09/29/2005 9:56:27 AM PDT
by
EagleUSA
To: TChris
If you buy a modern GPS receiver, the accuracy will have nothing at all to do with which one you use. GPS accuracy is a function of the physics involved with satellite positioning and the number of those satellites being tracked by your receiver. The more satellites it receives at once, the more accurate, up to a point. AFAIK, the best you get with GPS is about 15 ft (5 meters) accuracy. Good point, you may be able to get a little better if one of the "satellites" is actually a GPS transmitter on the ground near you with a location known preciscely. But maybe you can't provide that, so the above is about as good as it gets.
39
posted on
09/29/2005 9:56:40 AM PDT
by
KC_for_Freedom
(Sailing the highways of America, and loving it.)
To: Delphinium
Speaking as one who has used maps my whole life and have yet to use GPS, I can find a couple uses that I would consider getting one.
Boating navagation and tagging fishing holes and good hunting spots to return to.
I have heard that adjusters in Mississippi/La are using them to locate addresses as most of the street signs are gone.
What other uses do FReepers have for GPS?
40
posted on
09/29/2005 9:57:30 AM PDT
by
Rebelbase
(New Orleans rebuild by Mexican Labor will produce crawfish tacos and menuedo-gumbo.)
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