Roy,
You most likely are displaying GPS positions with respect to WGS84. Your USGS DRGs
are most likely being displayed with respect to NAD27. This incompatibility explains
the shift of a couple of hundred feet (~200 maximum within the US) in longitude.
You can either 1) change the coordinate system within MapInfo or 2) change the
reference datum within your GPS receiver interface.
Good luck,
Jeff
[EMAIL PROTECTED]
>> Question: Why is it that when using MI w/Geotracker to show position
>> over USGS DRGs there seems to be an error of a couple of hundred feet
>> or so to the east. (Position tracking icon is off set to the west or is
>> the image offset to the east?)
>> I think I have a problem but don't know what it is. Maybe
>> incorrect/incompatible projection? Any help would be appreciated.
>> tia
>> Roy
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