The National Tree Map™ (NTM™) is a dataset showing the location, canopy spread and approximate height of every tree over roughly 3 metres tall across Great Britain — derived from aerial survey rather than site-by-site manual mapping. For anyone assessing a site before design work begins, it's often the fastest way to get a genuine picture of tree coverage without commissioning a dedicated arboricultural survey at the earliest stage.
This covers what the National Tree Map™ actually contains, how it differs from a Tree Preservation Order check, and when it's the right tool versus when a full arboricultural survey is still needed.
National Tree Map™ vs Tree Preservation Order Data
These two datasets answer different questions and are commonly confused. The National Tree Map™ shows where trees physically exist and their approximate canopy extent, regardless of protection status. Tree Preservation Order (TPO) data shows which specific trees or areas carry legal protection, regardless of whether they're mapped in the NTM™. A site can have trees shown in the NTM™ with no TPO, or a TPO area with sparse tree coverage — checking one doesn't answer the other.
| Dataset | Shows | Doesn't Show |
|---|---|---|
| National Tree Map™ | Tree location, canopy spread, estimated height | Legal protection status |
| Tree Preservation Orders | Legally protected trees/areas | Full tree coverage or canopy detail |
How Professionals Use the National Tree Map™
Early-stage site appraisal
Before committing to detailed design, NTM™ data gives a quick, desk-based picture of tree coverage across a site — useful for initial feasibility rather than final design decisions.
Feeding into CAD workflows
NTM™ data is available as a CAD layer, allowing tree canopy positions to be overlaid directly onto a site plan. See our guide on including National Tree Map™ data in AutoCAD for the practical workflow.
For a broader look at working with canopy data in your designs, explore tree canopy mapping in CAD: a practical guide for architects and surveyors.
Cross-checking against planning constraints
Tree coverage often overlaps with other constraints. Check the National Tree Map™ alongside MapServe®'s Tree Preservation Order map and planning constraints maps for the fuller picture.
FAQ
Does the National Tree Map™ show Tree Preservation Orders?
No — these are separate datasets. Check MapServe®'s Tree Preservation Order map for legal protection status specifically.
What size of tree does the National Tree Map™ include?
Generally trees over approximately 3 metres in height, captured via aerial survey across Great Britain.
Can I use National Tree Map™ data in CAD?
Yes — it's available as a CAD layer. See our guide to using National Tree Map™ data in AutoCAD for the practical steps.
Does the National Tree Map™ replace an arboricultural survey?
No — it's a useful early-stage desk-based tool, but doesn't capture species, health or precise root protection detail that a qualified arboriculturist's survey would provide.
How current is National Tree Map™ data?
It's periodically refreshed from aerial survey. Check MapServe®'s National Tree Map™ page for current coverage for your site.
Get National Tree Map™ data for your site directly from MapServe®'s National Tree Map™ page.