Fig. 1From: Assessing a novel modelling approach with high resolution UAV imagery for monitoring health status in priority riparian forestsa–c Location of the ‘Bertiandos’ forest study site (outlined in yellow) and d–g examples of delineated crowns of trees (indicated in blue), showing enlarged views of high resolution crown orthophotomosaics (ground sample distance (GSD), 5 cm) consisting of four categories of forest health status: d asymptomatic, e less than 50% defoliation; f more than 50% defoliation, and g deadBack to article page