create_suntimes_rsts: Create rasters that indicate sunrise and sunset

In barrks: Calculate Bark Beetle Phenology Using Different Models

Create rasters that indicate sunrise and sunset

Description

Generate a list of two multi-layer SpatRasters for a given template that indicate sunrise and sunset for the respective cells. The package suncalc is required to use this function.

Usage

create_suntimes_rsts(
  template,
  dates = terra::time(template),
  crs = "EPSG:4258",
  tz = Sys.timezone(),
  .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 longitude and latitude.
tz	Timezone of the results.
.quiet	If TRUE, messages are suppressed.

Value

A list with the elements sunrise and sunset which are both multi-layer SpatRasters. The values indicate the respective time in minutes. Each layer represents one date.

See Also

create_suntimes_df()

Examples

# calculate suntimes, use barrks_data()$tmin as template
st <- create_suntimes_rsts(barrks_data()[[1]], .quiet = TRUE)

# plot results on May 1st, 2015
terra::plot(st$sunrise[[terra::time(st$sunrise) == '2015-05-01']])
terra::plot(st$sunset[[terra::time(st$sunset) == '2015-05-01']])

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