Garmin GPS
Submitted: Saturday, May 24, 2003 at 06:45
ThreadID:
5096
Views:
2171
Replies:
6
FollowUps:
3
This Thread has been Archived
Niko
If you need questiones answered, I should be able to help. I have worked for GME (Australian Garmin distributor) until just recently and pretty much know the ins and outs of the products. If not, I have insiders who can help me to answer your question :)
Reply By: Member - Bigbear - Saturday, May 24, 2003 at 09:17
Saturday, May 24, 2003 at 09:17
Hi Niko
I have a GPS II Plus using WGS 84 Datum. On lots of occassions when i put waypoints from the popular mags and then head for these spots the actual point is on many ocassions up to several hundred metres out. Am I doing something wrong or am I just not getting it rightBush Bappo's 4WD Club
Get out there & have a look
AnswerID:
20920
Follow Up By: Carl - Saturday, May 24, 2003 at 22:51
Saturday, May 24, 2003 at 22:51
When you are entering waypoints you need to set the GPS to the same datum of the waypoints you are entering. If you are taking the coordinates from a map you need to change the datum of the GPS to the datum of the map.
If you enter in coordinates/waypoints that are 200 metres away from where they should be then the coordinates you are entering are more than likely in AGD66. That would account for the 200 metre error with your GPS set to WGS84
FollowupID:
13527
Reply By: Member - Peter (WA) - Saturday, May 24, 2003 at 09:39
Saturday, May 24, 2003 at 09:39
Niko thanks for your up front offer of help I have a Garman GPS12 so far no problems but it is nice to know that expert help is close at handBorn to drive a 4x4 , not a keyboard
Peter
York 4x4
AnswerID:
20924
Reply By: Niko - Saturday, May 24, 2003 at 10:36
Saturday, May 24, 2003 at 10:36
Bigbear, the most common mistake is not setting the correct map datum. An example is when you buy the GPS new it is always in WGS84. However, land maps are often in AGD84. The best thing to do is go into your menu and select setup and choose the same map dataum as the maps you are using. The manual should explain how to find this. If the datums are the same then another scenario is the co-ords you were given are in a different format to what you are led to believe. With selective availability off (deliberate errors in satellite readings) we know will get anywhere between 3 and 15 metres inaccuracy. If this doesn't help fix the problem let me know.
AnswerID:
20927
Follow Up By: Member - Bigbear - Sunday, May 25, 2003 at 22:06
Sunday, May 25, 2003 at 22:06
Thanks guys.
When I did the trip up the CSR last year I used Hemma maps for GPS ref but when actually travelling even their points did not necessarily agree a lot of the time. Am I wrong in think Hemma uses WGS 84.
Bush Bappo's 4WD Club
Get out there & have a look
FollowupID:
13596
Reply By: Member -BJ (Sydney) - Saturday, May 24, 2003 at 15:42
Saturday, May 24, 2003 at 15:42
Thanks for the offer Niko am currently setting my 2+ up to work with iPac pda & Nat Maps if i get stuck i know who to callRegards Bob
Wish i was still here / Gulf in July
AnswerID:
20940
Reply By: Member - Bonz (Vic) - Monday, May 26, 2003 at 21:17
Monday, May 26, 2003 at 21:17
Niko,
Is the Garmin GPS V worth a second look? For map following and the like to save arguments with the principal navigator?
what dya reckonSo many
places to go!
So much work to do :0(
AnswerID:
21140
Reply By: Niko - Tuesday, May 27, 2003 at 22:03
Tuesday, May 27, 2003 at 22:03
I like the GPSV as a navigator for vehicle use. However, after having a streetpilot 3 for 8 months I couldn't imagine going outside familiar territory without one. Travelling through
Sydney ( I live in
Perth) in February this year was shear brilliance using the Streetpilot3. I just got back from
Sydney on another trip without the Streetpilot 3 and it was a dismal driving experience. I am normally patient but my navigator was not a happy camper!!! Minimum is the GPSV, for sure, however be aware that the GPSV can take both the metroguide and the city navigator maps. If you need to know any more details on these maps let me know.
AnswerID:
21237
Follow Up By: Niko - Tuesday, May 27, 2003 at 22:14
Tuesday, May 27, 2003 at 22:14
Regarding Hemma maps, they should state on the map around the edge or map info the datum it is using. I would think Hemma uses AGD84 which is 90% of all maps in use. Best thing to do if you cannot see the Map info then contact Hemma directly. Also, remember that sometimes data can be incorrect and you might be right. If the errors in metres are consistant for all the waypoints then it is clearly a mismatch of the datums.
FollowupID:
13823