GianniZotti
Posts: 1
Joined: Tue Jul 14, 2009 8:57 pm
Location: Chile

PSAD56 TO WGS84, BIG ERRORS

Tue Jul 14, 2009 10:26 pm

Device:Garmin 60CSx
Set Up Datum: WGS84
Working Location Grid Zone: 19S (North/Center of Chile)
The GPS achieved UTM coordinates are very consistent with Google Earth maps, no more than 5 meters of difference.
Next, I set up my device for PSAD 56 datum (Chilean government official datum). I take note of this new coordinates in PSAD56 datum (same place), then I convert to WGS84 using CoordTrans software and I get more than 200 meters of error (+180 mt N, +65 mt E) respect Google Earth maps.
Any comment or advise?

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