create_daylength_rst: Create day length rasters

In barrks: Calculate Bark Beetle Phenology Using Different Models

Create day length rasters

Description

Generate a multi-layer SpatRaster of day lengths for a given template. The package geosphere is required to use this function.

Usage

create_daylength_rst(
  template,
  dates = terra::time(template),
  crs = "EPSG:4258",
  .quiet = FALSE
)

Arguments

template	(Multi-layer) SpatRaster that determines the spatial extent of the result.
dates	Dates that should be processed. If not specified, the dates of template are used through terra::time().
crs	Coordinate reference system with longitude/latitude metrics. It is used to project the raster coordinates to be able to retrieve the latitude.
.quiet	If TRUE, messages are suppressed.

Value

A multi-layer SpatRaster. Each layer represents one date.

See Also

create_daylength_df()

Examples

# calculate day length, use barrks_data()$tmin as template
dl <- create_daylength_rst(barrks_data()$tmin, .quiet = TRUE)

# plot day length on May 1st, 2015
terra::plot(dl[[terra::time(dl) == '2015-05-01']])

barrks documentation built on April 3, 2025, 9:47 p.m.