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WestSideDaddy MnGCA Board

Joined: 06 Apr 2010
Posts: 549
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Posted: Fri Sep 02, 2011 8:16 am Post subject: Strange accuracy issue |
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So, on the way to work today I found a cache-less park (unless there was a puzzle final) and decided try hiding a nano I bought this spring.
So I used my Oregon 450 to mark a single way point.
Despite the unit showing good accuracy, it showed that the way point I just took was 47 feet away (I hadn't moved).
Is it possible to be +20 feet accurate and then -20 feet accurate (for a total of 40 feet of discrepancy) without moving over a matter of 30 seconds? |
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team_geomonkey Geocacher

Joined: 07 Dec 2009
Posts: 135
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Posted: Fri Sep 02, 2011 8:36 am Post subject: |
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| Yes - this happens to me alot. BUT what I do find out, is that the original coords that were marked are actually OK. I marked it 3-4 times and each time it was just a little off - so I walk back to the car, "find" and select the coords and then start walking and it all evens out. |
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Manfromwillow Geocacher
Joined: 04 Oct 2009
Posts: 139
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Posted: Fri Sep 02, 2011 9:37 am Post subject: |
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| team_geomonkey wrote: |
| Yes - this happens to me alot. BUT what I do find out, is that the original coords that were marked are actually OK. I marked it 3-4 times and each time it was just a little off - so I walk back to the car, "find" and select the coords and then start walking and it all evens out. |
I concur, I use a garmin vista hcx. |
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qwerty2582 Past MnGCA Board
Joined: 03 Apr 2009
Posts: 457
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Posted: Fri Sep 02, 2011 9:53 am Post subject: |
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This is precisely the reason to use the waypoint averaging feature  |
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WestSideDaddy MnGCA Board

Joined: 06 Apr 2010
Posts: 549
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Posted: Fri Sep 02, 2011 10:24 am Post subject: |
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| qwerty2582 wrote: |
This is precisely the reason to use the waypoint averaging feature  |
That's what is weird, I did use the way point average tool to create it.
Oh well. I'll try and test the coords on the way home and decide if I want to hide it there. |
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tonkaMN MnGCA Board

Joined: 10 Jun 2009
Posts: 558
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Posted: Fri Sep 02, 2011 10:44 am Post subject: |
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| I usually use Google maps to fine tune the reading I get from my oregon. That is if there is something nearby that you can identify from a satellite image. |
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bflentje Geocacher

Joined: 29 May 2006
Posts: 3673
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Posted: Fri Sep 02, 2011 11:44 am Post subject: |
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I am more concerned that you're hiding a nano. Join the revolution man.  |
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bflentje Geocacher

Joined: 29 May 2006
Posts: 3673
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Posted: Fri Sep 02, 2011 11:45 am Post subject: |
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| tonkaMN wrote: |
| I usually use Google maps to fine tune the reading I get from my oregon. That is if there is something nearby that you can identify from a satellite image. |
Actually, I'd very careful using this method. Down in Goodhue County the satellite images that overlay the road maps are off by well over 60' in some places. I would, without a doubt, rely more on the GPS than the Google Maps. |
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Hunter-Killer Geocacher

Joined: 25 Apr 2009
Posts: 222
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Posted: Fri Sep 02, 2011 4:29 pm Post subject: |
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I do not trust the 450 period. I use it, just to justify the purchase, but always rely on Kathy with the 60csx to find ground zero. The 450 has put me in some real bizarre spots, when caching alone with it. We have updated it, but it is just not reliable. The old workhorse 60csx will get a signal in some pretty thick stuff. Way too many times have I heard Kathy say, "where the heck you going, ground zero is this way." I miss printing out cache sheets too.  |
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Moe the Sleaze Geocacher

Joined: 10 Jan 2003
Posts: 1134 Location: Champlin, MN
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Posted: Tue Sep 06, 2011 6:42 am Post subject: |
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| tonkaMN wrote: |
| I usually use Google maps to fine tune the reading I get from my oregon. That is if there is something nearby that you can identify from a satellite image. |
Buzzzzzz. Wrong answer. _________________ "Hi, I'm Moe, or as the women know me - Hey! You in the bushes."
-Moe, The Simpsons |
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