obard: Open British Arboricultural Record Dataset (OpenBARD)

Description

OpenBARD are tree data used in the production of Fennell, Joseph. (2024). Handbook of UK Urban Tree Allometric Equations and Size Characteristics (Version 1.4). doi:10.13140/RG.2.2.28745.04961.

Usage

obard

Arguments

Format

The data frame obard has 15357 rows and 30 variables:

record_id: Record ID
n_stems: Number of stems
stem_diameter_1_cm: Diameter in cm of first stem
stem_diameter_2_cm: Diameter in cm of second stem
stem_diameter_3_cm: Diameter in cm of third stem
stem_diameter_4_cm: Diameter in cm of fourth stem
stem_diameter_5_cm: Diameter in cm of fifth stem
height_m: Height of tree in metres
life stage: Life stage of tree
physiological_condition: Physiological condition of tree
classification: Nature of the location of the tree (urban, suburban, rural)
county: County in which tree is located
latin_name_clean: Latin (scientific) name for tree
common_name_clean: Common name for tree
generic_name_clean: Genus name for tree
genus: Genus of tree
species: Specific epithet for tree
combined_stem_diameter_cm: Combined diameter in cm of stems
is_multistem: Is the tree multistemmed?
crown_radius_n_m: Radius in metre of crown on north compass point
crown_radius_s_m: Radius in metre of crown on south compass point
crown_radius_e_m: Radius in metre of crown on east compass point
crown_radius_w_m: Radius in metre of crown on west compass point
crown_radius_se_m: Radius in metre of crown on south-east compass point
crown_radius_nw_m: Radius in metre of crown on north-west compass point
crown_radius_ne_m: Radius in metre of crown on north-east compass point
crown_radius_sw_m: Radius in metre of crown on south-west compass point
crown_radius_minimum_bounding_circle: The radius of the expected minimum bounding circle of the crown
crown_radius_maximum: The maximum radial value recorded for the tree
data_contributor_id: Dataset-unique identifier for the data contributor

Details

The data can be found on Zenodo: https://zenodo.org/records/15593688

Estimates for the maximum sizes of amenity (and other, non-forestry) trees are important for urban planning and tree management. This report presents the findings of an applied research study to generate current best estimates for UK tree typical sizes and allometric equations. This report contains typical mature sizes for 46 species and 29 genera of trees commonly found in the UK’s towns, cities and land outside of woodland. While the data come from sites across the UK in both urban and rural areas, the data were all collected as part of professional tree surveys and so are likely to be representative of amenity trees. Trees grown in woodland conditions are not likely to be well represented by the models presented here. This report also contains allometric model formulae for up to 23 species (depending on the relationship), allowing tree characteristics such as diameter at breast height to be predicted by other measured parameters. The formulae can be used in Excel (or other software) for prediction.

What does the document contain? (1) Summary of methods used to generate the values and equations (2) Typical and large (95th percentile) crown radius, height, diameter at breast height and root protection radius for UK amenity tree species and genera (3) Plots to show these values (4) Coefficients for single-parameter allometric equations.

Examples

Run this code

# Load full data set
data(obard)

# View summary
str(obard)

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