For tree-ring labs
TrackEid
Tree-Ring Data Production Suite
Every ring, measured in the browser.
Trace rings, measure width and Blue Intensity, cross-date and build chronologies. It keeps working offline.
Built with the Xylometrics Lab at the University of Gothenburg. In use at the lab since September 2026.
The Suite
From sample to data
Three parts. Each works on its own or together.
TrackEid Imaging
A budget scanner that finds the wood on its glass and photographs only what is there. A concept we are building towards.
ConceptTrackEid
Ring tracing in the browser. Click a ring and the tracer follows it; add anchors where it needs help. Measures ring width, earlywood and latewood, and Blue Intensity over the true ring area.
In useTrackEid X-dating
Cross-dating on the measured series: the best offset per sample, ranked matches, pointer years, and chronologies with sample depth and EPS.
In useWhat it measures
The measurements labs already make
Built with the Xylometrics Lab and used there on the lab’s own samples.
Trace in the browser
Operator-guided tracing on scanner images and stitched phone photos. Nothing to install, and it keeps working offline.
Width, earlywood, latewood
Widths along the grain, scaled from a drawn ruler or the scanner’s DPI, with missing rings and cracks kept as known gaps.
Blue Intensity
Latewood and earlywood BI per ring, from CooRecorder-style strips or integrated over the true ring area.
Cross-dating and chronologies
Best offsets, ranked matches, sample depth, r̄ and EPS, with every revision of a chronology kept.
Your formats
Reads and writes .pos, so CooRecorder work comes along. Exports .rwl, .crn, CSV and Excel.
Pointer years
See at a glance whether your samples mark the same years, in every parameter at once.
Pointer years line up when the dating is right
Every parameter marks its own pointer years in its colour: high years above the line, low years below. A tinted column is a year that half the samples or more mark the same way. Nudge a sample a year and watch the columns break. The samples here are made up.
Pine 04 fits better at ±0: 67 of its 101 pointer years match there, 4 where it sits now.
Show as table
| Year | Samples measured | Strongest agreement |
|---|---|---|
| 1912 | 4 | LW low in 3 |
| 1913 | 4 | TRW high in 3 |
| 1918 | 4 | TRW low in 3 |
| 1920 | 4 | LWBI low in 3 |
| 1921 | 5 | LW high in 4 |
| 1929 | 5 | TRW high in 3 |
| 1931 | 5 | TRW high in 3 |
| 1933 | 6 | LW low in 6 |
| 1935 | 6 | LWBI high in 4 |
| 1938 | 6 | LW high in 4 |
| 1940 | 6 | TRW high in 4 |
| 1941 | 6 | TRW low in 5 |
| 1945 | 6 | LWBI low in 3 |
| 1947 | 6 | EW low in 5 |
| 1950 | 6 | TRW high in 3 |
| 1953 | 6 | LW high in 3 |
| 1954 | 6 | TRW low in 3 |
| 1955 | 6 | TRW high in 5 |
| 1959 | 6 | LW high in 5 |
| 1963 | 6 | TRW low in 5 |
| 1965 | 6 | LWBI low in 4 |
| 1966 | 6 | TRW high in 3 |
| 1968 | 6 | EW low in 5 |
| 1974 | 6 | LWBI low in 4 |
| 1975 | 6 | LWBI high in 5 |
| 1976 | 6 | TRW low in 5 |
| 1978 | 6 | EW high in 6 |
| 1979 | 6 | LW high in 3 |
| 1983 | 6 | TRW high in 5 |
| 1986 | 6 | LW high in 4 |
| 1987 | 6 | LW low in 5 |
| 1990 | 6 | LWBI low in 4 |
| 1992 | 5 | TRW low in 4 |
TrackEid Imaging · Concept
A budget scanner that finds the wood itself
Lay sliced cores and discs face down on flat glass, close the light-tight lid and press start. A webcam finds the wood, and a camera with a microscope lens moves underneath, stopping for each frame and skipping empty glass. The glass also shows whether a surface is sanded flat enough to measure.
Scan the code on the scanner to watch the scan build up on your phone. This is a concept we are building; tick the box in the form if your lab would use one.
- Camera
- Raspberry Pi HQ Camera with a microscope lens
- Light
- Oblique LED light under a light-tight lid
- Built from
- Raspberry Pi and 3D-printer parts
For labs
What labs ask us first
- Who builds it?
- TR8S AB in Gothenburg, together with the Xylometrics Lab at the University of Gothenburg. The lab has used TrackEid since September 2026.
- Who owns the data?
- Your lab does. You can export your measurements at any time, in formats other software reads.
- Where is it stored?
- On your own computer first, which is why it keeps working offline. It syncs to servers in Frankfurt, in the EU.
- What does it cost?
- Labs use an institutional licence, and the cost of running the platform is shared between the labs that use it. Ask us for your lab’s price.
- Can we put it in a grant?
- Often, as a purchased service. Funders’ rules differ, so check with yours. Ask us for a quote to put in the budget.
- Do we lose our earlier measurements?
- No. TrackEid reads CooRecorder .pos files, so the work you already have comes along.
What we hold to
Affordability
A flatbed scan or a set of phone photos is enough to start. The cost of running the platform is shared between the labs that use it.
Accessibility
It runs in the browser, so there is nothing to install, and it keeps working without a connection.
High Fidelity
Blue Intensity over the true ring area, and missing rings and cracks kept as known gaps instead of guessed widths.
Access
Request access
Labs join by invitation, a few at a time. Tell us a little about your lab and we will get back to you.