Distribution models calibrated with independent field data predict two million ancient and veteran trees in England

R Code and data associated with the manuscript: Distribution models calibrated with independent field data predict two million ancient and veteran trees in England. Accepted to Ecological Applications, 2022. [e-mail] Contents 1) Model Raster Results - zipped file containing the final raster predictions maps from each of the models. 2) Results Verification 2 - csv file containing the results from the field verification work 3) Results SDMs - csv file containing AIC and AUC results from each of the models 4) Model Results (R script) - script to analyse the overall results from each of the models 5) ZI models fitting and analysis (R script) - script to fit and analyse the ZI models 6) Field Verification (R script) - script to analyse the results from the field verification work 7) Bias correction - Background manipulation (R script) - code to fit the background manipulation SDMs 8) Bias correction - Spatial Filtering (R script) - code to fit the spatial filtering SDMs 9) Bias correction - Bias Files (R script) - code to fit the bias file SDMs 10) Final Rasters - zipped file containing environmental predictor raster layers 11) Data - zipped file containing additional data used in the manuscript