Forum: Just Getting Started In Geocaching
Topic: Datums and S&T 2005
started by: gpsuser

Posted by gpsuser on July 26 2005,10:23 am
Here is a question I have, I hope someone can clear up. I have a Meridian Gold and Streets and Trips 2005.  The default datum is WG S84 but when I use this setting Streets and Trips is off up to 1/2 mile. When I set the unit to NAD 27 it is very accurate in Streets and Trips and the marker shows up on the map where it should. I have not tried the other datums since NAD 27 is working great. I saw on another forum that one person was told this would not have anything to do with accuracy but evidently it without doubt does concerning Street and Trips 2005. Also if this be the case how do we know when out in the field what to set the datum to on our units?  I hope my questions make sense.

Thank You



Posted by Quinn on July 26 2005,4:40 pm
hmmm... this sounds a bit strange to me. I am wondering if there is a setting in your software that is off a tad or even in the GPSR.
In any case, if you are using the GPS for Geocaching the setting needs to be at WGS84.
I'll see if I can find out any info on the other.

Posted by gpsuser on July 27 2005,7:11 am
Quote (Quinn @ July 26 2005,6:40 pm)
hmmm... this sounds a bit strange to me. I am wondering if there is a setting in your software that is off a tad or even in the GPSR.
In any case, if you are using the GPS for Geocaching the setting needs to be at WGS84.
I'll see if I can find out any info on the other.

Thanks for replying.  I found the answer. Some how in Setup (Meridian Gold) (Coord System-Lat/Lon) the setting had been set at Deg/Min.mmm instead of Deg/Min/Sec. Now NAD27 and NAD83 and WSG84 all work great and are right on in S&T 2005.



Posted by Quinn on July 27 2005,11:41 am
great...but for Geocaching you will need to reset back to Deg/Min.mmm  as we do not use seconds, but instead use decimal minutes.
Posted by gpsuser on July 27 2005,5:30 pm
I was not aware of that, thank you for letting me know. I'm learning as I go. I am amazed at the accuracy of this unit.
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