2

How i can import text ascii xyz gps time-series in QGIS for velocity visualization? Example xyz

MLBU 07SEP17 2007.7098 -0.119998752351520E+07  0.626106994328102E+07 -0.199557178074915E+06 0.207580378379693E-02 0.688694158114217E-02 0.167028519927681E-02 -0.432413829679299E+00 -0.294246245808878E+00 -0.241551761061731E+00   0.0440      
MLBU 08OCT27 2008.8214 -0.119998748492467E+07  0.626106996496541E+07 -0.199557272577850E+06 0.177540837906686E-02 0.544305986402370E-02 0.125203333713396E-02 -0.406578041535175E+00 -0.380198113705744E+00 -0.169205118981982E+00   0.0440   
MLBU 08OCT28 2008.8241 -0.119998748057435E+07  0.626106994058613E+07 -0.199557268106748E+06 0.163271389703205E-02 0.545521782141717E-02 0.125248020339965E-02 -0.364152596013678E+00 -0.322222382069869E+00 -0.225626920103452E+00   0.0440   
MLBU 08OCT29 2008.8268 -0.119998748935304E+07  0.626106994613964E+07 -0.199557266997545E+06 0.180883196725595E-02 0.553506537089556E-02 0.123434396540034E-02 -0.446056985528425E+00 -0.344555449202127E+00 -0.138131302309021E+00   0.0440   
MLBU 08OCT30 2008.8296 -0.119998747872900E+07  0.626106994248618E+07 -0.199557272277408E+06 0.178404554463326E-02 0.558892609202391E-02 0.126453718280939E-02 -0.408043047490696E+00 -0.301726277134347E+00 -0.220835346270359E+00   0.0440   
MLBU 12NOV27 2012.9062 -0.119998752079494E+07  0.626106994654682E+07 -0.199557266943162E+06 0.177827563592024E-02 0.590724278110163E-02 0.132934929405479E-02 -0.506586634191501E+00 -0.274032086958880E+00 -0.225077175456706E+00   0.0000   

Info about format

------------
.txyz2 format (x,y,z time series)
------------
1. station ID (SSSS)
2. date (yymmmdd)
3. decimal year
4. x (m)
5. y (m)
6. z (m)
7. sigma x (m)
8. sigma y (m)
9. sigma z (m)
10. correlation xy
11. correlation yz
12. correlation xz
13. antenna height (m)

Here other "env" file

site YYMMMDD yyyy.yyyy __MJD week d reflon _e0(m) __east(m) ____n0(m) _north(m) u0(m) ____up(m) _ant(m) sig_e(m) sig_n(m) sig_u(m) __corr_en __corr_eu __corr_nu
KUAL 97OCT13 1997.7823 50734  927 2  103.1   4339  0.177431    588149  0.292110    54  0.954835  0.0752 0.001056 0.000861 0.004192 -0.023271 -0.027301 -0.028409
KUAL 97OCT14 1997.7851 50735  927 3  103.1   4339  0.176362    588149  0.292644    54  0.970189  0.0752 0.001134 0.000916 0.004460 -0.037736 -0.003632 -0.018609
KUAL 97OCT15 1997.7878 50736  927 4  103.1   4339  0.174625    588149  0.294894    54  0.948587  0.0752 0.001054 0.000916 0.004241 -0.059047  0.000548  0.115913

Info about this format http://geodesy.unr.edu/gps_timeseries/README_tenv3.txt

  • 2
    I can't imagine a GIS application which couldn't read this data, but the procedures to do so would be sufficiently different to make this a score of different questions. Please edit the question to specify the GIS application you want to use, take some effort to start importing the data, and post a specific, focused question (with details of the software, steps taken, and code, if any) if you have difficulty. – Vince Jan 6 '16 at 17:21
  • Thank you. I'm not an expert in this particular (feature) area. – wonder Jan 6 '16 at 17:36
  • 2
    ArcGIS and QGIS are still two different applications, generating two different answers. You don't need to be an expert to start work. – Vince Jan 6 '16 at 17:56
  • 1
    You may need to convert the XYZ coordinates, if they're 3D Cartesian, into latitude, longitude, ellipsoidal height, then also convert the ellipsoidal height into geoidal height (aka relative to MSL/geoid). – mkennedy Jan 7 '16 at 0:03
  • Thanks @mkennedy. Could you describe, in this issue, more detail here gis.stackexchange.com/questions/175926/… And as I understand it is impossible to do in QGIS? – wonder Jan 7 '16 at 19:09
3

Use the Add delimited text tool or Layer/Add layer/Add delimited text from the menu:

enter image description here

This way you get points in QGIS.

|improve this answer|||||
  • Thank you very much. Is it possible to calculate the vertical velocity in mm (z coordinates) using QGIS? – wonder Jan 6 '16 at 19:09
  • 1
    I think first you should create lines from points using a plugin see: gis.stackexchange.com/questions/137585/… or gis.stackexchange.com/questions/162072/…. You should copy the time for the start and end point to the line. Finally, using field calculator to calculate speed. It is an idea, I didn't test it :( – Zoltan Jan 7 '16 at 7:28
  • @wonder Loading data and analyzing it are very different questions. Please ask one question at a time, in separate questions, so that answers can be generated for each. – Vince Jan 7 '16 at 11:51

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.