- Source
- Recreated 2025 AIA · schematic
- Tree
- T1 · DSH 1300 mm
- NRZ
- 15.0 m radius · 706.9 m²
- SRZ
- 3.8 m · clear
- New works
- 0.0% of NRZ · –
- Existing
- 0.0% · excluded
AS 4970:2025 reports that agree with themselves.
TreeDraft turns your field data and the architect's site plan into a draft Arboricultural Impact Assessment. Every figure is calculated, and every section comes from one source, so the summary, tables, discussion and hold points can't contradict each other. You review it and sign it.
Founding practices: A$99/month, first month free. No payment to join the waitlist.
We rebuilt a real 2025 report in TreeDraft. The numbers matched.
To test it, we took a publicly lodged AS 4970:2025 Arboricultural Impact Assessment from a Tasmanian council development application and re-entered its tree schedule and site plan.
| Item | Report | TreeDraft |
|---|---|---|
| NRZ radii | 9 stated | 9 / 9 identical |
| SRZ radii | 9 stated | 8 / 9 identicalT1 differs by rounding only* |
| TPZ circles on the plan | 9 drawn | All within 0.1 mmeasured after scaling from the scale bar |
| Hold points | 5 listed | 5 / 5 matched, 1 addeda risk assessment the report's own text calls for; root investigation also extended to T8 and T9 |
| Tree | Report NRZ | TreeDraft | Report SRZ | TreeDraft |
|---|---|---|---|---|
| T1DSH 1300 | 15.0 | 15.0 | 3.9 | 3.8* |
| T8DSH 300 | 3.6 | 3.6 | 2.1 | 2.1 |
| T9DSH 300 | 3.6 | 3.6 | 2.1 | 2.1 |
| T10DSH 250 | 3.0 | 3.0 | 1.9 | 1.9 |
| T11DSH 850 | 10.2 | 10.2 | 3.2 | 3.2 |
| T12DSH 450 | 5.4 | 5.4 | 2.5 | 2.5 |
| T13DSH 500 | 6.0 | 6.0 | 2.6 | 2.6 |
| T14DSH 700 | 8.4 | 8.4 | 3.0 | 3.0 |
| T15DSH 450 | 5.4 | 5.4 | 2.5 | 2.5 |
* The formula gives 3.846 m. The report rounds to the nearest 0.1 m for every other tree, so 3.8 m is consistent. If you prefer to round SRZ up, TreeDraft has a setting for it. Radii in metres.
It also caught three things the report got wrong about itself.
None of these is a criticism of the author. They're what happens when a summary, a schedule and a discussion are typed separately into Word. TreeDraft writes them all from one calculation.
The report
Tree 1: about 16% encroachment, plus encroachment into the SRZ, headed Moderate
. The report's own method says any SRZ intrusion is Major.
TreeDraft
MODERATEOne rule for every tree: any SRZ intrusion is Major. Traced from the plan, the new access covers 10.3% and stays outside the SRZ, so Moderate. The existing access does enter the SRZ, and is reported on its own.
The report
Trees 8 and 9 sit under a Minor encroachment
heading, but the sentence calls it a moderate encroachment (<10%)
.
TreeDraft
MINOREach tree has one category. The heading, the table and the sentence all read it from the same place.
The report
The summary describes the trees as Black Gum and Radiata Pine. The schedule also lists a White Peppermint and a Silver Wattle.
TreeDraft
ONE SOURCESpecies are entered once, in the schedule. The summary and discussion are written from it.
The report is anonymised here, and no author, site or council is named.
Trace the architect's plan. Encroachment follows the geometry.
Drop in the PDF, set the scale from the scale bar, click each trunk and trace the works. Then try it: drag the driveway across tree A's root zone.
- Upload the plan. PDF or image; choose the page from a drawing set.
- Set the scale. Click two points on the scale bar and enter the distance.
- Click each trunk. Trees land where you click. Drag to fine-tune.
- Trace the works. Mark existing works so they're shown but not counted.
Encroachment scan
Tree A · NRZ 7.4 m · SRZ 2.8 m
–
Illustrative plan and trees, not a real site. Figures are calculated live with the same exact geometry TreeDraft uses.
You measure and judge. TreeDraft calculates and drafts.
The AI writes words, never figures. If a draft states a number that doesn't match the calculation, TreeDraft throws that draft away and keeps its own wording.
- Calculations
- NRZ, SRZ and multi-stem diameters under AS 4970:2025, with encroachment by exact area and SRZ intrusion by exact distance. Minor, moderate and major categories, or the 2009 10% rule for councils still on it.
- Site plan
- PDF or image plans, scaled from a known distance. Click trunks, trace works, mark existing structures. Adjusted TPZ per tree, shown on the plan.
- Report
- Introduction, methodology, tree schedule, impact table, discussion, recommendations, a hold-point schedule generated from the data, and your own Tree Protection Specification clauses. Exports to Word.
- Protection and risk
- Trees protected by a planning code or tree register are never steered toward removal. Likelihood of failure, with works inside one tree height flagged for a risk assessment.
- AI drafting
- Your field notes turned into professional discussion and recommendations, using the calculated figures. If you edit a tree, its AI text is marked out of date.
- What it isn't
- It doesn't certify anything. You review every draft and sign it. The calculations follow published summaries of AS 4970:2025 and are being checked against the standard.
What would you want it to do?
TreeDraft is still being built, and consulting arborists are shaping it. Tell us what would make it worth using, or what would stop you.
- The slow part. Which section of an AIA takes you longest?
- Your council. Local rules, templates or wording it should know.
- The deal-breaker. Anything that would stop you trusting it with your signature.
Founding practices: A$99 a month, first month free.
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