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 in many different ways:

  • 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.
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