I have recently purchased a Trimble GeoXH (used) and have done a few surveys. I have done differential correction in Trimble Pathfinder Office and all points seem fine.

When exporting to shape and other formats, all points is warped or compressed in Y-axis (and maybe X as well). Could this be a projection problem? Other solutions? I need to use the data in Qgis or similar.

  • What are you exporting (projection wise) too? – Mapperz Nov 30 '12 at 18:23
  • Exporting from corrected Trimble .ssf file (primarily point_generic with XYZ values) to *.shp to be imported in QuantumGIS or similar for generating contour model. – Stian Schjelderup Nov 30 '12 at 22:41

I guess you are stumbeling on the view of WGS84 lat/lon, which gets distorted the more to the poles you come.

Just set your project CRS to a projected CRS, for example EPSG:3857 (what Google Maps and Openstreetmap use) or the UTM zone for your part of the world, make sure that "on-the-fly-projection" is chekced, and the picture you see is similar to the maps you know.

  • Aha, I guessed this could be the problem but is it the raw file to be exported which need to be set with projected CRS or when importing in Qgis or similar? – Stian Schjelderup Nov 30 '12 at 22:37
  • The data from the GPS unit is most probably WGS84 lat/lon, so the layer should be set to that CRS(rightclick on the layer->Properties). The project CRS can be chosen differently (Settings->Project Settings) and should be in your case. EPSG:32632 (UTM 32N) should do well in Oslo. – AndreJ Dec 1 '12 at 6:18

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