UCB-Drone

Bucket Path

gs://pyregence-tree-mortality/ucb-drone/

Source data and documentation

• Raw data from: osf.io/3cwf9/
• The crown data were pulled from data/data_drone/L3a/crowns/
• The classification data (live/dead) were pulled from data/data_drone/L3b/model-classified-trees_all.gpkg
• Software repository: mikoontz/local-structure-wpb-severity
• Paper: ecoevorxiv.org/jz964/

Preprocessing

See the notebooks DroneMergeCrownClassifications.ipynb and DroneResampleDownloadCovariates.ipynb for details on how the data were merged and the covariates resampled to match each overflight plot.

Basically, a series of delineated crown polygons were provided for each of 31 sites, covering a north-south and elevation gradients in the Sierras. These datasets were filtered to only include trees flagged as dead, and rasterized to square extents. These processed data are provided in the base bucket directory for this dataset.

The raw data from the repository are stored in the raw/ directory, and intermediate products stored in processed/.

The final datasets are 1m resolution binary categorical datasets, with 1s encoding a dead tree crown. These each cover somewhat small spatial extents, typically ~500x500m (or 25 ha each). The naming format is {sitename}_{elevation}_{sitenumber}_dead.tif (eldo_5k_1_dead.tif, for example).