For each dekad in a given date range, computes:
A per-pixel fractional weight (0-1) representing the portion of the dekad
falling inside the pixel's growing season.
A per-pixel count of absolute days (0-11) falling inside the season.
Usage
wapor_build_season_weights(
start_date,
end_date,
start_raster,
end_raster,
reference_year
)
Arguments
- start_date
Date or character. Start of the analysis date range.
- end_date
Date or character. End of the analysis date range.
- start_raster
SpatRaster. Pixel-wise season start Julian days.
- end_raster
SpatRaster. Pixel-wise season end Julian days.
- reference_year
Integer. The season reference year.
Value
A list with components:
- weights
SpatRaster with one layer per dekad (fraction 0-1)
- days
SpatRaster with one layer per dekad (absolute days)
- dekad_table
data.frame of dekad periods