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Transferring points from Trimble Connect to Terraflex

  • 1.  Transferring points from Trimble Connect to Terraflex

    Posted 02-13-2025 14:21
    I'm a non-professional (hobby) user, using a Trimble Catalyst DA2 to locate buried survey stations (OS triangulation stations) in the UK, using TerraFlex. The process needs sub metre accuracy. I've been copy-pasting the Eastings and Northings (1cm precision) across from a website, which works well but is a little fiddly. It would be more convenient to get the points across in bulk. I can import them to Connect via a kml file, and send them to TerraFlex as forms. However, I quickly discovered that the forms aren't accurately located - perhaps rounded to the nearest metre.

    Advice appreciated on whether there's a way to transfer points to TerraFlex preserving 1cm accuracy. My manual process works OK - but it's manual, and tends to rely on internet being available on site, or a backup list being available offline.

    Thanks
    Rob Woodall


  • 2.  RE: Transferring points from Trimble Connect to Terraflex

    Posted 05-07-2026 07:07

    Hi Rob,

    I am having a similar issue were you able to resolve this?

    Thanks 

    Sasha Shute



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    Sasha Shute
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  • 3.  RE: Transferring points from Trimble Connect to Terraflex

    Posted 05-09-2026 12:41
    Hi Sasha 

    Yes. Mark Kelloway (IIRC) came up with a process via QGIS which worked nicely. I'll see if I can locate it, or maybe Mark will beat me to it :-)

    Rob



    Original Message


  • 4.  RE: Transferring points from Trimble Connect to Terraflex

    Posted 16 days ago

    The issue is likely not the KML itself, but how Trimble TerraFlex stores/imports point geometry. KML coordinates are often handled as standard WGS84 lat/long with limited displayed precision, and TerraFlex forms may snap or round locations to ~1 m. A better approach is usually to import the points as a proper GIS dataset (CSV/Shapefile/GeoJSON) with explicit coordinate fields and full decimal precision, then map them in Trimble Connect or directly into TerraFlex if supported. For UK OS triangulation stations, keeping everything in British National Grid (EPSG:27700) until final conversion also helps avoid precision loss. In practice, many DA2 users find that CSV import with high-precision coordinates (rather than KML placemarks/forms) preserves sub-metre accuracy much better.



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    Jason John
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