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Trimble gps path finder office12/25/2023 ![]() I’ve exported our data four different ways: (1) using the downloaded reference position and exporting in WGS84 datum, (2) using the downloaded reference position and exporting in ITRF to NAD 1983 (2011), (3) using Trimble’s reference position and exporting in WGS84 datum, (4) using Trimble’s reference position and exporting in ITRF to NAD 1983 (2011) datum. Our unit delivers +/- 1.0cm horizontal accuracy after post-processing. We’re less than one mile from the CORS base station. We collected a position over a NHDOT benchmark. This generally makes sense to me because I know that WGS84 and NAD83 have about a 1m shift, but I get into the weeds when I process/export our data in other ways. We’ve noticed that these positions have shifted about one meter when compared to our original procedures of exporting in WGS84. However, for a recent project we’ve changed our procedures and exported data in latitude/longitude, but in the “ITRF to NAD 1983 (2011)” datum provided by PFO. We’ve always exported in latitude/longitude in the WGS 1984 datum. ![]() We do not choose to use the reference position provided from Trimble’s base station list, which provided the reference position in terms of ITRF00 (1997) (which I believe is synonymous with WGS 1984 (G730)).Īfter differential correction, we provide a coordinate system and datum to export features. Our correction process has always used the reference position provided from the downloaded base files, which in this case is in the NAD 1983 (2011) datum. ![]() Our unit collects in the WGS84 datum (we confirmed this by checking the rover settings). We collect our GNSS positions in autonomous mode using a Trimble 7X Centimeter Edition rover unit and then use Trimble Pathfinder Office to correct these positions against a CORS base station. I've seen posts like this and this, and documents like this, but there must be something I'm fundamentally missing here, because after reading information provided in the links, I'm still not getting the result I'm expecting. I am struggling to understand how Trimble’s Pathfinder Office transforms and exports GNSS data and I’m hoping someone here can explain.
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