Guest jeremy Posted January 5, 2001 Share Posted January 5, 2001 tted on a NAD27 chart will be about 0.65 seconds (65 ft) south and 5 seconds (330 ft) west of its true position. In some areas of the world, the local datum may differ from WGS84 by a mile or more. Many GPS receivers can be set to display positions in a local datum rather than WGS84. Most Garmin receivers can display positions in more that 100 different datums. It appears that Garmin receivers store waypoint positions as WGS84 co-ordinates, and convert between the currently selected datum and WGS84 as needed, so that the physical location of a waypoint should not change as you change the current datum on the receiver. Jeremy Quote Link to comment
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