Quick Start - ugcs/GeoHammer GitHub Wiki

Idea is to simplify processing of large amounts of GPR or CSV data and allow survey results assessment by not geophysicists in the field. It will never be a replacement for full-blown geophysical packages like Oasis Montaj, Prism2, Geolitix etc.


If creating a GPR amplitude maps is required click here.


That being said, let's start!

  1. Download the latest build - GeoHammer (select .zip file).

  2. Extract files to any folder.

  3. Start app using geohammer.exe (on Windows) or start.sh (on Mac or Linux).

  4. Click on "Open files" or drag and drop '.sgy', '.csv' or '.asc' files (even folders) to the application window.

  • Sample files are available here (GPR and Magnetometer), here (GPR) or here (Magnetometer).

You will see the track on the map, profile in the center and processing menu on the right side.

image

Survey area tools Profile editing, saving and marking tools
1. Settings 11. Open files..
2. Select Area 12. Save
3. Apply Crop 13. Save to..
4. Split the line 14. Save all
5. Undo 15. Close all
6. Measure distance 16. Create mark
7. Export As.. 17. Delete selected element
8. Enable/disable background map layer 18. Delete all additional elements
9. Toggle amplitude map layer 19. Fit previous line to window
10. Toggle GPS track layer 20. Fit current line to window
21. Fit next line to window
22. Zoom in
23. Zoom out
24. Fit current chart to window
25. Crop samples

  1. Click "Select area" button and select area of interest using the selection tool and then click on the "Apply crop" to get individual profiles.
image
  • You will see that your one continuous profile was split to multiple separate profiles.
image
  • Let's remove the small leftover trace from one of the profiles at the bottom:
  1. Using arrows for 'Fit the previous line' or 'Fit the next line' image locate the transversely laid out profile. It will be highlighted yellow in the map on the left side.
image
  1. Press the red 'X' in the profile left upper side to remove it.
image
  • We now have succesfully imported and edited our GPR profiles.
image


Now we can start to do the data processing.



  1. Click "Remove background" (button on top-right) and adjust contrast slider till you get good reflections in the profile.
image
  • You should see something like this. (Note, that radargramms will differ in looks due to geology, flight altitude, settings in GPR etc.)

image

  1. Now because the penetration depth of our GPR didn`t exceed 125 ns, we can cut all the unnecessary data so that vertical scale increases and we can more easily see hyperbolas. By moving up and down the blue triangles, we can adjust the part, that will remain after cutting has been applied.
image
  1. After resizing our profiles, we can mark locations of burried objects or other structures. Double-click on the point of interest to create a waypoint and click on "Create mark" image.
image
  1. After we have marked our locations, we can click on "Export", select 'KML marks' to export and save them. After that has been done we can upload them to any platform that supports .kml files, for example, Google Earth:

Note, that this option is only available for licensed software!

image

  1. For finalising the project, click "Save" to save new separate profiles to the same folder(s) as original file(s), or "Save To" to save them to a new folder. When you save the files, flags will be saved as marks in .sgy files, additional markup will be saved in separate files.

⚠️ **GitHub.com Fallback** ⚠️