gps

Submitted: Monday, Jul 28, 2008 at 22:45

ThreadID: 60265 Views:2726 Replies:4 FollowUps:6

This Thread has been Archived

Member - Tony N (WA)

Hi Guys , on the road at the moment & seem to be having with correct GPS readings. I,m using a PDA with Oziexplorer & Copilot on two different chips, both give me the same co-ordinates but on checking with others on the road & at camps mine is along way out, even when i check with the caravan parks theirs & mine don't line up. interesting the degree out varies each night . question is is there some way i can get this corrected .
apart from the slight problems holiday is going fine from Mandurah -Ceduna- Roxby Downs- Pt Augusta -William Creek=Coober pedy -Oodnadatta-Ururu-Three Ways & now at Charters Towers
Only one Puncture not bad for 8000kms 2500of it on dirt roads

Back Expand Un-Read 0 Moderator Share

Reply By: Member - Toolman (VIC) - Tuesday, Jul 29, 2008 at 08:25

Tuesday, Jul 29, 2008 at 08:25

Tony,
How far out are your reading compared to others you have compared to?
I may be asking the obvious but are you sure you have the correct datum set? EG do you have AGD66, WGS84 or GDA94 set?

Toolman

AnswerID: 317810

Follow Up By: Member - Toolman (VIC) - Tuesday, Jul 29, 2008 at 08:28

Tuesday, Jul 29, 2008 at 08:28

I should also have asked what datum you maps use in your PDA as the GPS and the Map datums should be the same.
Toolman

FollowupID: 584169

Follow Up By: Member - Tony N (WA) - Tuesday, Jul 29, 2008 at 17:36

Tuesday, Jul 29, 2008 at 17:36

thanks for the reply toolman , not sure what u mean as to settings but will try some tonite .Will be on the road again tomorrow for a couple of days .will reply as to whats happening

FollowupID: 584288

Follow Up By: Member - Toolman (VIC) - Wednesday, Jul 30, 2008 at 09:54

Wednesday, Jul 30, 2008 at 09:54

Tony,
I was less specific than "Bushtrek" but meant the same thing. Just follow his instructions but find out first what datum your maps are and then set up the same datum in OziExplorer. As he said most would be on WGS84 but some may not and I don't know what maps you are using. If you don't know where to find that info, let us know what maps you are using and many on this forum could then let you know the datum you should set in Ozi.

Good luck
Toolman

FollowupID: 584469

Reply By: Bushtrek - Tuesday, Jul 29, 2008 at 11:57

Tuesday, Jul 29, 2008 at 11:57

Check your datum matches first.
Within Configuration folder:-
Under GPS(NMEA) Output datum make sure it is WGS 84.
Under General settings ensure the Display datum is also WGS 84.

Now recheck the output info.

If its out tell us by how much both northing and easting.

Cheers

AnswerID: 317840

Follow Up By: Member - Tony N (WA) - Tuesday, Jul 29, 2008 at 17:43

Tuesday, Jul 29, 2008 at 17:43

thanks bushman,as with toolman i'll try things tonite.
variation differs .example Hughenden 00.03.81s 000.10.6E
Charters Towers 00.34.4s 000.08.1E
Thanks again

FollowupID: 584289

Reply By: Member - Andrew (QLD) - Wednesday, Jul 30, 2008 at 10:34

Wednesday, Jul 30, 2008 at 10:34

The issue sounds possibly like a "co-ordinate format" one......you may have the settings in DDMMSS.SS and the other GPSr in DDMM.MMM (or even DD.DDDDD) etc.

Andrew

AnswerID: 318088

Follow Up By: Member - Toolman (VIC) - Wednesday, Jul 30, 2008 at 13:40

Wednesday, Jul 30, 2008 at 13:40

I agree that is also a possibility so to check for that , note down your GPS coords in the format they are displayed and also the coordinates of the GPS against which you are comparing in the format they are displayed but be careful that you record them properly including decimal places or you'll confuse yourself even more.

toolman

FollowupID: 584507

Reply By: Member - Tony N (WA) - Thursday, Jul 31, 2008 at 08:37

Thursday, Jul 31, 2008 at 08:37

thanks toolman & bushman Gps seems to be running almost correct.only a couple of seconds out. at least I might find the Barra spots on the way to Roper Bar & others on the Savannah

AnswerID: 318256