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My workflow requires me to collect a position and time stamp every second during a survey. Work in remote areas requires an offline solution like QField. It appears QField may not have an automatic setting to collect positions/time stamp but I’m not a QField super user so figured I’d ask the crowd before continuing my search for a solution.

Anyone have ideas how I can collect x, y, and time at one second intervals in remote areas?

TomazicM
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MetalDetector
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    You can enable tracking (automatic vertex digitisation every x seconds/metres) using the QField app settings. If you enable this on a line layer that has supports the M-dimension or M-values (often saved as geometry type LineStringM), the timestamp is recorded in the M value for each vertex. Have a look at that first. Read this for more about M values https://gis.stackexchange.com/questions/285316/what-does-m-value-represent/285318#285318 – she_weeds Jan 30 '24 at 03:54
  • Using your instruction, I’ve created a M-enabled point layer with an attribute field called [time_doubl] and set the data type to double. I was able to import the layer to QField and collect points at 1 second intervals. That’s partial success. Unfortunately, when I import my new track points back to QGIS there is no time data in my time field. Is the time stamp stored elsewhere. Do I need to use field calculator to pull it into the attributes? – MetalDetector Jan 30 '24 at 18:59
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    The time is stored in the M dimension which isn't automatically shown in the attribute table (much like the geometry column). You can extract it using m() – she_weeds Jan 30 '24 at 22:59
  • That worked. I used m() in the field calculator to populate a new column. It’s in Unix epoch time so needs to be converted to date/time for my purpose but I can deal with that. – MetalDetector Feb 01 '24 at 01:44

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