GPS location error

Submitted: Friday, Mar 21, 2003 at 23:14
ThreadID: 3985 Views:1465 Replies:4 FollowUps:5
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Hi,

Just started using Magellan Platinum GPS with oziexplore software and raster 250K maps. I seem to be always shown as located about 30km north west of where I really am. GPS doesn't seem to get it wrong, just the PC.

Anyone have any tips for what I have done wrong?

Thanks
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Reply By: Member - Topcat - Saturday, Mar 22, 2003 at 00:18

Saturday, Mar 22, 2003 at 00:18
Have you configered your GPS NMEA Output Datum to the software? The Raster 250K series is Auslig 1966 datum (unless you have the latest edition) where I believe the Magellan default setting is WGS 84. If you have set both to WSG 84 the software should correct the map settings automatically, otherwise set it to the Auslig Datum. Don't forget that the map series is over 35 years old & tracks marked on there are not necessarily in the same postion today. Also there is a magnetic north deviation correction as well.
I run a Magellan 320 with OziExplorer software & the early edition of the Raster Series Maps & have my datum set at WSG84 & have no problems with positions. I also run it on the HEMA Great Desert Maps Series with the same configeration without any position problems.
You can always email Des Newman at info@oziexplorer.com as he has helped me with some mapping problems in the past. Hope this helps.Have Wheels Will Travel
AnswerID: 15826

Reply By: Groove - Sunday, Mar 23, 2003 at 21:22

Sunday, Mar 23, 2003 at 21:22
Did you calibrate the maps yourself or did you use the .map files from the ozieplorer web site.

If you did the calibration yourself grab the .map files from the oze web site they are very accurate. I have been using this program for a few years now and highly recomend it.
AnswerID: 15940

Reply By: Kev. - Sunday, Mar 23, 2003 at 23:38

Sunday, Mar 23, 2003 at 23:38
Dont the Yanks throw the GPS out when theres a war on ?

Dont think it would be that far out though !
AnswerID: 15947

Follow Up By: Ray - Monday, Mar 24, 2003 at 00:03

Monday, Mar 24, 2003 at 00:03
Nope, why would they do that. It's as accurate as ever.
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FollowupID: 9738

Follow Up By: Frog - Monday, Mar 24, 2003 at 01:06

Monday, Mar 24, 2003 at 01:06
read (PostID: 3948)
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FollowupID: 9742

Follow Up By: Ray - Monday, Mar 24, 2003 at 10:14

Monday, Mar 24, 2003 at 10:14
Thanks Frog but the guy that wrote that article sure was scraping the bottom of the barrel. There has not and will not be any planned disruption to the gps service.
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FollowupID: 9752

Follow Up By: Kev. - Monday, Mar 24, 2003 at 11:09

Monday, Mar 24, 2003 at 11:09
Umm ,so tha Yanks are the only ones that have accurate readings therefore having an advantage over the enemy.

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FollowupID: 9754

Follow Up By: Ray - Monday, Mar 24, 2003 at 16:45

Monday, Mar 24, 2003 at 16:45
Iraq doesn't have any gear to take advantage of GPS and any enemy that did would have the gear to get around selective availability.
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FollowupID: 9764

Reply By: rors101 - Monday, Mar 24, 2003 at 09:40

Monday, Mar 24, 2003 at 09:40
DXJ - Just reload the correct .MAP files. A very easy mistake (I did it a few weeks ago!!) here is the official response from Oziexplorer:

The file you attached which "doesn't work" is a map file for the AUSLIG Release 2 Sydney map not a NATMAP.

You have installed the NATMAP files or the AUSLIG Release 2 Files, there are both these options on the current OziExplorer CD Installation options. (I assume you have a recent CD which has the NATMAP and the AUSLIG Release 2 files on it.)

Please check what you have installed.

The NATMAP files are installed to "NATMAP CD1" etc folders under the "Maps" folder.

The AUSLIG files are installed to "AUSLIG CD1" etc folders under the "Maps" folder


AnswerID: 15960

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