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
The data can be found on Zenodo.
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.
Install OpenBARD from CRAN:
install.packages("OpenBARD")You can install the development version of OpenBARD from Codeberg:
remotes::install_git("https://codeberg.org/drdcarpenter/OpenBARD.git")The OpenBARD package provides the data in a convenient format for R users.
library(OpenBARD)
head(obard)
#> record_id n_stems stem_diameter_1_cm
#> 1 993206fd-a580-4649-b979-45ae23eca818 1 55.5
#> 2 da6f26e5-890a-41a0-96a5-469dbc1ee9b4 1 65.0
#> 3 85be7deb-5e04-4641-bdac-8a8c7d44c153 2 27.0
#> 4 998e8fb8-ebc4-4959-b060-03c5a5886b87 2 24.5
#> 5 f8157205-13e6-4052-bc9a-17b876fc8008 1 40.0
#> 6 6fc59b04-7883-4147-94d9-850ed3c5a003 2 50.0
#> stem_diameter_2_cm stem_diameter_3_cm stem_diameter_4_cm stem_diameter_5_cm
#> 1 NA NA NA NA
#> 2 NA NA NA NA
#> 3 23 NA NA NA
#> 4 24 NA NA NA
#> 5 NA NA NA NA
#> 6 45 NA NA NA
#> height_m life_stage physiological_condition classification county
#> 1 20 semi_mature good suburban cheshire
#> 2 18 semi_mature good suburban cheshire
#> 3 8 mature good suburban somerset
#> 4 8 mature good suburban somerset
#> 5 15 semi_mature fair urban somerset
#> 6 18 mature good urban somerset
#> latin_name_clean common_name_clean generic_name_clean genus
#> 1 tilia europaea common lime lime tilia
#> 2 aesculus hippocastanum horse chestnut horse chestnut aesculus
#> 3 magnolia macrophylla bigleaf magnolia magnolia magnolia
#> 4 magnolia macrophylla bigleaf magnolia magnolia magnolia
#> 5 acer pseudoplatanus sycamore sycamore acer
#> 6 acer pseudoplatanus sycamore sycamore acer
#> species combined_stem_diameter_cm is_multistem crown_radius_n_m
#> 1 europaea 55.5 False 8.5
#> 2 hippocastanum 65.0 False 8.0
#> 3 macrophylla 35.5 True 4.5
#> 4 macrophylla 34.3 True 4.0
#> 5 pseudoplatanus 40.0 False 7.0
#> 6 pseudoplatanus 67.3 True 7.0
#> crown_radius_s_m crown_radius_e_m crown_radius_w_m crown_radius_se_m
#> 1 9.0 6 6.0 NA
#> 2 9.0 6 8.0 NA
#> 3 3.5 5 4.0 NA
#> 4 5.0 5 4.5 NA
#> 5 7.0 6 6.0 NA
#> 6 7.0 6 6.0 NA
#> crown_radius_nw_m crown_radius_ne_m crown_radius_sw_m
#> 1 NA NA NA
#> 2 NA NA NA
#> 3 NA NA NA
#> 4 NA NA NA
#> 5 NA NA NA
#> 6 NA NA NA
#> crown_radius_minimum_bounding_circle crown_radius_maximum data_contributor_id
#> 1 8.8 9 C1
#> 2 8.5 9 C1
#> 3 4.5 5 C1
#> 4 4.8 5 C1
#> 5 7.0 7 C1
#> 6 7.0 7 C1If you encounter a bug, please file an issue with a minimal reproducible example on Codeberg.
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