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Why is post processing GPR data important?

The benefits of digitalising information are tremendous. Digitalised data is edited faster, transferred easily and stored more conveniently. More and more industries are requiring digitalised data –  this is also valid for underground utilities. Updating digital data easily provides accurate, reliable data in an efficient way.

Keeping the utility maps in digital format also ensures updated utilities. Inaccurate and not up-to-date data of underground utilities can lead to utility strikes, cause elevated repair costs and be hazardous to human health.

One important step of utility detection is the post-processing of the ground penetrating radar (GPR) data collected. Detecting underground utilities with a GPR requires expertise on the field. That is why a post-processing software is crucial for interpreting results.

Post-processing of GPR data simplified

GPR software solutions are taking the complexity from the user. Leica DX Office Vision utility post processing software was designed to be used by less experienced users and ensures that the collected data is reliable to conduct post-processing of GPR data.

Data acquisition and interpretation of GPR data is done by comparing the reflections on multiple swaths, and as the spacing between swaths increases, the interpreted information gets more accurate. Less spacing distance between swaths means more number of swaths for a certain area. As the number of swaths increases, it gets more difficult to compare the reflections on them.

Post-processing software makes it easier to:

  • Compare the swaths
  • Identify the reflections belonging to the utilities
  • Trace the lines of the area.
DX Office Vision results on Google Earth

Doing the same on the field without a post-processing software requires very experienced users and it is very time-consuming. Additionally, even if the user has the experience and can mark the utilities on the surface, it is a separate step to collect this data and make it digital. Post-processing software makes it more efficient to interstate and digitalise data as these can be done in one step. Using a user-friendly post-processing software reduces the time needed for converting radar data to digital maps by up to 80 percent.

Since the post-processing can be done in the office, multiple users can analyse the data. Post-processing ensures the reliability and accuracy of the data that will be used to digitise underground utilities.

GPR + precise positioning 

Utility detection radars must be user-friendly and perform to detect not only buried utilities but other buried objects like old foundations, water tanks, concrete blocks, etc., that can also be valuable for underground maps. Thanks to its dual frequency antenna, the Leica DS2000 Utility Detection Radar can detect the reflections from deep buried objects too.

Multiple swaths on DX Office Vision

Without precise positioning, no data acquisition can provide high-quality digital data. Utility detection radars that can be used with a high precision GNSS antenna, give the required accuracy for the underground utilities. With Leica GG04 plus Smart Antenna, positioning is provided during the data acquisition with the Leica DS2000, so after post-processing data, a digital map with coordinates is easily obtained.

With the solution including the DS2000 utility detection radar, DX Office Vision software, and  GG04 GNSS Smart Antenna, converting the buried services to 3D CAD drawings is very easy and fast.