Before conducting any geophysical measurement you have to know what kind of objects or cavities you are looking for and if the area you choose is suitable for this procedure. Measuring without a plan will not give you the results you are expecting.
For this reason please consider the following hints:
- What are you looking for (graves, tunnels, buried objects, ...)?
If you are looking for big objects you can enlarge your distance between the impulses (measuring points), for small objects use smaller distances.
- Inform yourself about the area you choose for measurement. Is it useful to search at this place? Are there historical indications, which confirm your speculations? What type of soil is present at this area? Are there good conditions? Is correct data recording possible?
- Your first measurement in an unknown area has to be large enough to get representative scan values (e.g. 40 impulses, 20 scan lines).
- What is the expected shape of the object you are going to detect? If you are looking for an angular metal box, the identified object in your scan image should have a form according to your expectations.
- To get precise scan values concerning the depth measurement, the object has to be in the center of the scan image, which means it has to be surrounded by normal reference values (normal ground). If the object is at the side of the scan image and not totally visible a correct depth measurement is not possible.
- If possible there should be only one single object in your scan image. Otherwise, this will influence the correctness of the depth measurement.
- You should do at least two control scans to make sure your results are valid. So you can also recognize and isolate mineralized ground.
After conducting the geophysical measurement according to the previous hints and our Ground Scan Guide, the recorded scan data needs to be analyzed. In the following sections all necessary information concerning 3D scan analysis will be provided.
Metal object or mineralization?
At the very beginning it is not always easy to find out the difference between metallic objects and mineralization. Generally, metals are represented in reddish colors, but mineralized deposits in the ground can also include red color signals.
Here are some important notes how to distinguish a real object from a mineralization (please take note that the following information are based on the usage of the standard color scheme "Red-Green-Blue"):
If the target or anomaly in your graphic has a special geometric form (e.g. rectangle or circle) it might be possible that it could be a real underground object.
If there are many yellow and orange color values around the object, it might be a mineralization.
With a very small median depth value between 0.10 m or 0.40 m there is a high chance of mineralization.
Always repeat your measurement to make sure there are no mistakes or wrong signals in your scan! If the position, depth and shape of the detected anomalies are staying nearly the same, also in further control scans, you can conclude of a real object.
Please read section Modifiers to get more information about how to detect mineralization with the modifier functions!
Tools of the Right Sidebar
The Right Sidebar of Visualizer 3D Studio offers various options that help to analyze and optimize your scan images.
In addition to the information in this documentation OKM offers individual training for Detectors and Software Analysis.