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Importing vectors from geomax into starnet

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surveygrug
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Can anyone tell me how to import rtk vectors from geomax into starnet? The geomax software has the option to save as a starnet .dat file but I haven't figured out what to do with it


 
Posted : August 30, 2025 10:05 am
jhframe
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Star*Net typically wants GNSS vectors in its own *.gps format.  If your GeoMax software is creating a Star*Net *.dat file, it may be exporting only coordinates, possibly with standard errors.

Post an example here so we can see what you're dealing with.


 
Posted : August 30, 2025 7:20 pm
surveygrug
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These are different file types I exported from the geomax tablet. 

 


 
Posted : September 1, 2025 6:43 am
jhframe
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The 0825stn.dat file appears to be a properly-formatted Star*Net vector file.  I don't think the fact that it has a .dat extension instead of .gps is a problem, I'm pretty sure that's a non-binding naming convention.   

What seems unusual to me is that many of the vector covariance matrices in it are zeroed out, which means that Star*Net won't be able to weight those vectors correctly.  All the zeroed vectors appear to be "pre-shots" in that they appear just before a vector to the same point number that has plausible-looking covariance data.

Looking at the 0825.rw5 file it looks like most if not all of the points were stored prior to the RTK shots (i.e. office-entered coordinates).  That probably accounts for the zero-covariance vectors that show up in the .dat file.  My instinct would be to remove those zeroed-out vectors from the file, as their XYZ deltas are markedly different from the corresponding shots that follow.

Editing aside, to incorporate this file into your adjustment you need to make sure that Star*Net is aware of it.  The application will automatically look for a .dat file with the same name as the project as long as it's in the default directory, but in order to use any other data file you have so specify it (View|Data Input Files|+).

The 0825_1.xml file appears to have all the point and vector data as well, though I'm not familiar with the specific formatting.


 
Posted : September 1, 2025 8:09 am
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surveygrug
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That's where I was going wrong. I was trying to use the input/import gps data menu to import it. one step closer. thanks


 
Posted : September 1, 2025 8:41 am