BasePlan ArborRequest beta access

AS 4970 tree plans. No CAD. No GIS.

Professional-grade AS 4970 tree plans without the software cost, learning curve or per-plan drafting time of CAD or GIS.

Runs in the browser. Nothing to install.

Request beta access

Free during the closed beta.

Hand-drafted tree protection plan: a tree with a solid SRZ ring, a dashed NRZ ring and a dotted TPZ set-out adjusted along a building line, with control points, a hatched encroachment area and a pencil resting on the sheet.

TREE PROTECTION PLAN

AS 4970:2025

SCALE 1:2000246810m
NRZSRZTPZ (set-out)
  • Tree
  • NRZ
  • SRZ
  • TPZ (set-out)
  • Encroachment
  • Control point

Review before export

  • Plan alignedScale and fit shown
  • Scale checkCross-check shown
  • Control pointsReviewed
  • Ready to exportDA-ready format

Built for professional arborist workflows.

No CAD. No GIS. No manual or unscaled markups in PDF editors.

General-purpose CAD, GIS and PDF markup tools can all produce an AS 4970 tree plan. Plenty of consultants use them every day. It works. That's why arborists keep doing it this way.

It's also how the figure became a second trade: software built for engineers and drafters, doing one specialist job on the side.

BasePlan Arbor was built for that job. The NRZ and SRZ come from your tree data, and the drawing you do is the professional part.

Spatial reliability built in.

BasePlan Arbor aligns your project plans to true scale, generates NRZ/SRZ geometry from your tree data, calculates encroachment areas and percentages, and exports DA-ready AS 4970 tree plans with spatial accuracy data on every output.

Every step is visible before you export.

  • Two plan layers settling into alignment on drafting paper, with a faint offset ghost and circled control points at matching intersections.

    Align to true scale

  • Plan-view tree canopy with a small solid SRZ ring at the stem and a larger dashed NRZ ring around it.

    NRZ & SRZ

  • Dashed NRZ arc crossing a building line, with tight hatching marking the encroachment area between them and control points on the line.

    Encroachment

  • Completed tree plan sheet with a plan-view tree, a dashed NRZ ring, an empty title block and a tick-marked scale bar.

    DA-ready output

AS 4970:2025 terminology: BasePlan Arbor calculates the NRZ and SRZ. You draw the TPZ.

Professional-grade AS 4970 tree plans.

You bring the project plans, data, and professional judgement. BasePlan Arbor delivers the spatial reliability and AS 4970 tree plans.

Exports DA-ready AS 4970 tree plans.

BasePlan Arbor is a product of BasePlan Studio.

hello@baseplanapp.io

A faster, easier way to create AS 4970 tree plans.

Free access during the closed beta

We're opening BasePlan Arbor to selected consultants producing AS 4970 tree plans for DA work. Access is free while we test the workflow, with unlimited exports. Testers who work with us on practical feedback get their first month free after launch.