wbt_time_in_daylight: Time in daylight
In whitebox: 'WhiteboxTools' R Frontend

wbt_time_in_daylight

R Documentation

Time in daylight

Description

Calculates the proportion of time a location is not within an area of shadow.

Usage

wbt_time_in_daylight(
  dem,
  output,
  lat,
  long,
  az_fraction = 10,
  max_dist = 100,
  utc_offset = "00:00",
  start_day = 1,
  end_day = 365,
  start_time = "00:00:00",
  end_time = "23:59:59",
  wd = NULL,
  verbose_mode = NULL,
  compress_rasters = NULL,
  command_only = FALSE
)

Arguments

`dem`	Input raster DEM file.
`output`	Output raster file.
`lat`	Centre point latitude.
`long`	Centre point longitude.
`az_fraction`	Azimuth fraction in degrees.
`max_dist`	Optional maximum search distance. Minimum value is 5 x cell size.
`utc_offset`	UTC time offset, in hours (e.g. -04:00, +06:00).
`start_day`	Start day of the year (1-365).
`end_day`	End day of the year (1-365).
`start_time`	Starting hour to track shadows (e.g. 5, 5:00, 05:00:00). Assumes 24-hour time: HH:MM:SS. 'sunrise' is also a valid time.
`end_time`	Ending hour to track shadows (e.g. 21, 21:00, 21:00:00). Assumes 24-hour time: HH:MM:SS. 'sunset' is also a valid time.
`wd`	Changes the working directory. Default: `NULL` will use the value in WhiteboxTools settings, see `wbt_wd()` for details.
`verbose_mode`	Sets verbose mode. If verbose mode is `FALSE`, tools will not print output messages. Default: `NULL` will use the value in WhiteboxTools settings, see `wbt_verbose()` for details.
`compress_rasters`	Sets the flag used by 'WhiteboxTools' to determine whether to use compression for output rasters. Default: `NULL` will use the value in WhiteboxTools settings, see `wbt_compress_rasters()` for details.
`command_only`	Return command that would be executed by `system()` rather than running tool. Default: `FALSE`.