3D Ground Scan Mode

3D Ground Scan mode lets you sweep the searchcoil over an area and visualize buried objects as a 3D heat map on your smartphone screen — before you dig.

tip

Familiarise yourself with Discrimination mode before using 3D Ground Scan. Understanding how the detector responds to targets will make your 3D results easier to interpret.

Performing a 3D Ground Scan

1. Enter 3D Ground Scan from the main menu.
2. Hold your finger on the on-screen circle and align it with the centre of the searchcoil, so the circle sits right in the middle of the coil on screen.
3. Press the Pin-point / Ground Grab button to start the scanning process.
4. Move the device left and right to calibrate the positioning sensor. Once calibrated, the message "Scan in progress" appears on screen.
5. Move the detector coil slowly from left to right over the area you want to scan.
6. When finished, press the Pin-point / Ground Grab button again to stop scanning.

What You Can Adjust During Scanning

Control	Action
Transparency slider	Adjust how opaque the scanned data overlay appears
Scanning circle position	Reposition the alignment circle if needed
Restart button	Clear the current scan and start a new one
Device handling indicator	Observe whether you are holding the device correctly

Observing & Processing Scan Results

After scanning, tap the viewer button to open the 3D ground scan viewer.

In the viewer you can:

• View the scan in 2D or 3D
• Rotate, zoom, and pan the 3D scan using standard iOS touch gestures
• Enable smart 3D scan processing to enhance target shapes
• Use the processing sliders to fine-tune the enhancement, then apply to sharpen target outlines

3D Scan Examples

The 3D viewer displays buried objects as raised peaks. Examples of what GoldHunter can visualise:

• Three gold coins
• A gold nugget alongside a ferrous metal / nail
• A piece of a T-shaped ancient dagger
• A metal frame of a bunker entrance
• A shield round-shaped frame

Sharing & Saving Scans

From the 3D ground scan mode, tap the Share button to:

• Share snapshot — export the current view as an image
• Share CSV — export the raw scan data as a comma-separated file for import into other 3D mapping software

To save a scan, enter a file name when prompted and tap OK. Saved scans can be accessed later from Browse Stored Scans.