how do I correct eMap's lat/long

[corddogs]

I've been using my eMap with MapSource for road trips, POIs etc. Works great. I now plan to use it to track where I am to an internet site (I'm an Amateur Radio operator). I notice that it reports my lat/long consistently about 60 feet south/southwest of my actual location, even when I'm seeing 4-5 sats and accuracy is shown at 25 feet. That is, the mapping system being using (at findu.com) consistently draws me 60 feet SSW of my location. The MapSource maps draw me correctly, of course.

It appears to be related to Map Datum and North Reference. I have the first set to WGS84 and the latter to Magnetic. (When I tried True North, the map at findu.com showed me over a mile southeast of where I was, while Magnetic was only off by 60 feet.) I would prefer to get the eMap to generate lat/log that's compatible with this major Amateur Radio web site. Can anyone get me headed in the right direction?

[DavidW]

Can you check with another mapping source to see if the error is in your GPS position or in the web site?

I presume you're using some kind of APRS. I'm always interested to hear what people are up to with amateur radio.



David, G0WZA

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