Cities across Europe are under pressure to justify how they manage urban trees. Not just to document what exists, but to demonstrate that decisions were based on reliable data, taken at the right time, and defensible if challenged.
That is the problem the greehill Spring Series addresses directly, bringing together greehill and European partners around one shift: from traditional tree inventory to a data-driven operational system.
The Stakes Are Rising
Urban trees are critical infrastructure. Research across 93 European cities found that the urban heat island effect is linked to around 6,700 premature summer deaths annually (European Commission), and trees are among the most cost-effective interventions available.
Liability exposure is increasing in parallel. Dutch municipal data shows paid compensation for tree failure averaging €2,244 per claim, with individual cases reaching nearly €50,000. Injury rates from tree failure increased 5.3% per year between 1998 and 2021 (Nature Scientific Reports).
Pressure comes from both directions. Cities need to expand and maintain their urban forest. They also need to manage the risk and accountability that comes with it. Neither is possible without reliable data.
What Traditional Tree Inventories Cannot Do
Most cities still rely on static records. These capture conditions at a single point in time. They do not update as trees change or support decisions made months later.
The consequences are direct. Outdated records delay response when a tree condition changes. Inconsistent data weakens procurement decisions and makes inspection planning harder to justify. Missed risk creates liability exposure that the records, by design, cannot defend against. In practice, this means decisions are made with data that cannot be defended when it matters.
What a Smart Tree Inventory Changes
A Smart Tree Inventory replaces subjective field records with measurable, structured data. LiDAR scanning captures each tree as a point cloud. Height, crown volume, trunk diameter, and structural form are extracted automatically, consistently, at scale, without reliance on individual inspector judgement.
The operational difference is immediate:
- For inspectors: Priority is determined by data, not by routine. Teams visit the trees that have changed, not the full estate. Site visits become targeted and defensible.
- For managers: Every decision is traceable. When a risk assessment is questioned by a committee, an insurer, or a legal process, the data behind it is structured and dated.
- For reporting: Output is no longer a snapshot. It is an evolving record that shows how conditions have developed over time, supporting both accountability and forward planning.
The shift is not just technical, it changes what the data is used for. Traditional inventories feed a document, but a smart approach feeds a system. This also changes accountability. Consistent, measurement-based evidence is easier to audit, easier to communicate publicly, and more robust under procurement scrutiny. As tree failure rates rise across Europe, that robustness is increasingly what separates managed risk from exposed liability.
The greehill Spring Series: Partners and Their Roles
Our Spring Series brings together four European partners, each representing a distinct implementation context:
- Atregia (Czech Republic) — arboricultural application in the field: how LiDAR data integrates with ground-level inspection and tree assessment practice
- nbtm (Poland) — operational scaling: how a data-driven approach works across large and mixed urban tree estates
- R3GIS (Italy) — system integration depth: connecting digital twin data with GIS infrastructure and municipal planning workflows
- Entti (Finland) — monitoring in harsh conditions: seasonal variation, canopy change over time, and sustained data reliability
Each session shows what was implemented, how it was done, and what changed in daily operations.
Sessions and Registration
Tuesday 12 May 2026, 15:00–16:00 CET STI vs TTI – Czech Republic Speaker: Martin Vokral, Atregia Register here
Wednesday 13 May 2026, 15:00–16:00 CET STI vs TTI – Italy Speaker: Paolo Viskanic, R3GIS Register here
Wednesday 20 May 2026, 14:00–15:00 CET STI vs TTI – Finland Speaker: Tomi Kivikorpi, Entti Register here
Wednesday 28 May 2026, 15:00–16:00 CET STI vs TTI – Poland Speaker: Kamil Witkos, nbtm Register here
Why the Window Is Narrowing
European street tree populations frequently show limited age diversity, increasing their vulnerability to synchronous decline. Climate stress, including drought, heat, and more frequent storms, is accelerating structural deterioration in trees that visual inspection alone may not detect in time.
The gap between what cities need to know and what their current records can tell them is not static. It widens every year that data capture methods stay the same while tree conditions deteriorate and accountability expectations increase.
Want to learn more about how greehill supports cities move from static records to Smart Tree Inventory? Visit greehill.com
