Survey History and Direct View
You can access the history of your surveys on the device in the Menu at:
OPTIONS > HISTORY
It will display a list of all the surveys on your device. By selecting one of those surveys you'll get access to a map of that survey as well as some basic statistics.
At any time, you can access the latest survey — or the survey currently being done — by double tapping the back of your Mnemo. It will display a map that orientates according to the orientation of the device if you are in survey mode, otherwise oriented north.
Give an impulse left to the slider button and you will have a screen displaying info on the current survey.
One more slide and you are back where you started from. This feature can be deactivated and its sensitivity adjusted with the "Double Tap" setting in MNemoLink.
In BASIC mode, you can also access the current survey map and info by using clicks (details here)
2D / 3D Map View
When a map is displayed — whether from History or from the BASIC mode shortcut — pressing the select button cycles through three views:
2D Map → 3D Map → Statistics → exit
[select] [select] [select]
3D Map
The 3D view renders the survey in perspective with depth-based colour: blue = deepest, red = highest (since v3.1.0; the on-device gradient now matches the web view's). Three reference axes are shown at the origin:
- Yellow arrow — vertical (UP)
- Red arrow — North
- Blue arrow — East
The camera angle is controlled by the IMU — simply tilt and rotate the device to change the viewing direction. The camera framing adjusts automatically to fit the entire survey in view.
Web Interface
When connected over WiFi (see Wireless Data Transfer), every recorded survey can be viewed in your browser as well as on the OLED.
2D survey map
From the device's main web page, clicking a survey opens the /View page: a top-down SVG map of the survey path. (v3.1.0+) The path is drawn as per-segment lines coloured by depth — blue = deepest, red = highest — so it stands out clearly against the dark background. Stations are marked with circles (yellow at the start, red elsewhere).
Interactive 3D viewer (v3.1.0+)
On the 2D map page a ▶ View in 3D button opens /View3D, a full-screen interactive 3D viewer of the same survey. Controls:
| Action | Mouse | Touch |
|---|---|---|
| Orbit | Left-drag | One-finger drag |
| Dolly (camera distance) | Right-drag up/down | — |
| Zoom | Scroll wheel | Pinch |
| Re-centre on a station | Click the station | Tap the station |
A base-plane grid is drawn at the deepest survey point, and a small compass-rose axes widget (East / North / Up) sits in the lower-left corner. Use the ← 2D link at the top-left to return to the 2D map.