Tree Survey (TS)
A tree survey (TS) is a comprehensive assessment of a specified tree population. A tree survey is typically undertaken with the aim of providing base data on the existing tree population to assist in the management and future planning around those trees.
The extent of data and key attributes collected for each tree is driven by the overall scope of the project in consultation with the client(s) and relevant stakeholders. Base data or key attributes for each individual tree will typically include:
- Identification: Allocated number and botanical name.
- Dimensions: Tree height, canopy spread, and trunk diameter at breast height (DBH)
- Spatial location: Northing and easting or latitude and longitude of the tree location.
The first stage of a Tree Survey requires the precise and meticulous collection of tree data and spatial locations. When the tree data is collected and analysed, it can be utilised:
- Annual mortality adjustments.
- Avian habitat suitability.
- Building energy effects.
- Canopy cover calculations and projections.
- Carbon sequestration and storage.
- Cost-benefit analysis.
- Diversity indices and relative performance.
- Extreme event impacts for weather and pests.
- Golf course management and maintenance.
- Hydrology effects (avoided run-off, interception, transpiration).
- Leaf area and biomass.
- Local government street tree databases.
- Pest risk analysis.
- Planning and design of suburbs and precincts.
- Pollution removal and human health impacts.
- Species condition and distribution.
- Species importance values.
- Tree bio-emissions.
- Tree maintenance and management plans.
- Tree planting inputs.
- Tree pollution removal and human health impacts.
- Ultraviolet radiation (UV) tree effects.
Frequently Asked Questions
A tree survey (or tree mapping) is a comprehensive survey and assessment of a tree population within a designated site or parcel of land. The first stage of a tree survey is the tree mapping. Tree mapping comprises numbering, tagging, and collecting data for each tree within the site. Once the tree mapping has been carried out and all relevant data has been collected the tree survey report can be prepared.
Tree mapping is used to collect arboricultural data and information relating to the population of trees within a specific site. The type of information that is collected can be tailored to the needs or requirements of the project. Tree mapping is often used by councils or property managers to compile an electronic tree database used for tracking and scheduling inspections, maintenance, or implementing tree management plans.
Tree mapping is an excellent tool for understanding the overall health, condition, quality, or species of trees within the study area. General information collected for each individual tree should include a tree number, botanical name, height, canopy spread, age class, tree significance, useful life expectancy, priority for retention, and trunk diameter at breast height (DBH). The tree survey report should also include a tree location plan prepared using CAD or ArcGIS software. The tree location plan will show the number and location of each tree.