GPS Information.net Forum >

Questions and Answers about GPS Technology and Equipment
It is currently Thu May 23, 2013 11:36 am

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 5 posts ] 
Author Message
 Post subject: Waypoint keeps changing
PostPosted: Sat Jun 26, 2010 6:17 pm 
Offline
normal user

Joined: Sat Jun 26, 2010 6:10 pm
Posts: 2
My son got his Garmin GPS today and we went searching. We were in the forest with the points entered. Walking on the path we read so many feet and dirrection to the find. We walk to that point to get another reading.
I checked the number of satalites and found we had 5 or 6 each time.
Have used my GPS on the boat and neve had this problem. We found openings in the trees for best readings and never did we get solid point.
Any suggestions?
thanks for reading :?:


Top
 Profile  
 
PostPosted: Sat Jun 26, 2010 10:10 pm 
Offline
normal user

Joined: Fri Jan 13, 2006 2:51 pm
Posts: 1704
Location: Alberta Canada
Reception under tree cover is always subject to more error than when you have a clear view of the sky on the water. The best accuracy you can expect from recreational grade GPS receivers is +/- 3 metres (10 ft) under ideal conditions. Under tree cover or in difficult topography accuracy will be much worse.

For geocaching once you're close it's better to put the GPS away and start thinking about where the hide might be.


Top
 Profile  
 
PostPosted: Sun Jun 27, 2010 6:29 pm 
Offline
normal user

Joined: Sat Jun 26, 2010 6:10 pm
Posts: 2
Thanks for the answer,
I do understand the search and find, but when the GPS tells me I need to move 70 feet south, and I do so. After I move the 70 feet south and the GPS tells me to go 300 feet north.
I just find it hard to find anything in a woods when this happens. How do we find a point we can trust?
thanks


Top
 Profile  
 
PostPosted: Mon Jun 28, 2010 12:54 pm 
Offline
normal user

Joined: Fri Jan 13, 2006 2:51 pm
Posts: 1704
Location: Alberta Canada
There's not an easy answer to the problems you're seeing under tree cover. Check on the type of antenna your unit has and the preferred orientation to get the best reception. This used to be a simple rule of holding units with patch antennas flat and quad antennas vertical but is more complicated today with new antennas of different types.

Some folks have resorted to using external antennas mounted in their hats or on poles to get the best reception. Most folks I think develop a sense of when to trust the reception and when to ignore false readings due to multipath and other issues.

There are literally thousands of caches out there in forests and they are found regularly


Top
 Profile  
 
PostPosted: Mon Jan 30, 2012 10:31 am 
Offline
normal user

Joined: Thu Jan 26, 2012 4:36 am
Posts: 1
I think problem lies in the antena


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 5 posts ] 

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
Powered by phpBB® Forum Software © phpBB Group