GROUNDTECH DISCOVERY Series, User Manual, Page: 20 / 37

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CAVITY DETECTION
Tunnel Grave
Artificially created underground cavities such as tunnels,
chambers, tombs are seen as
blue color in the graphic. In the
event of any dents or soil filled in the underground, the data
will be light blue, turquoise or light green.
What you are searching for must have a distinctive shape and
form, for example if you are searching for a structure that re-
sembles a tomb, the blue area on the graph should be rectan-
gular and the size of a tomb.
In order to see this numerical value, you should switch to the
Scanning Details feature in 3D viewer function.
There must be a decrease of at least 15 points between the
soil which is shown with green and grounds which are shown
with blue. For example, if soil level is 150, then the grounds
should have a value of 135-130.