R/DAYMET_FUNCTIONS.R
get_daymet.Rd
get_daymet
returns a SpatRaster
of weather data cropped to a given
template study area.
get_daymet(
template,
label,
elements = c("dayl", "prcp", "srad", "swe", "tmax", "tmin", "vp"),
years = 1980:(lubridate::year(Sys.time()) - 1),
region = "na",
tempo = "day",
extraction.dir = file.path(tempdir(), "FedData", "extractions", "daymet", label),
raster.options = c("COMPRESS=DEFLATE", "ZLEVEL=9", "INTERLEAVE=BAND"),
force.redo = FALSE,
progress = TRUE
)
An Simple Feature
or SpatRaster
object to serve as a template for cropping.
A character string naming the study area.
A character vector of elements to extract.
The available elements are:
dayl = Duration of the daylight period in seconds per day. This calculation is based on the period of the day during which the sun is above a hypothetical flat horizon.
prcp = Daily total precipitation in millimeters per day, sum of all forms converted to water-equivalent. Precipitation occurrence on any given day may be ascertained.
srad = Incident shortwave radiation flux density in watts per square meter, taken as an average over the daylight period of the day. NOTE: Daily total radiation (MJ/m2/day) can be calculated as follows: ((srad (W/m2) * dayl (s/day)) / l,000,000)
swe = Snow water equivalent in kilograms per square meter. The amount of water contained within the snowpack.
tmax = Daily maximum 2-meter air temperature in degrees Celsius.
tmin = Daily minimum 2-meter air temperature in degrees Celsius.
vp = Water vapor pressure in pascals. Daily average partial pressure of water vapor.
A numeric vector of years to extract.
The name of a region. The available regions are:
na = North America
hi = Hawaii
pr = Puerto Rico
The frequency of the data. The available tempos are:
day = Daily data
mon = Monthly summary data
ann = Annual summary data
A character string indicating where the extracted and cropped DEM should be put. Defaults to a temporary directory.
a vector of GDAL options passed to terra::writeRaster.
If an extraction for this template and label already exists in extraction.dir, should a new one be created?
Draw a progress bar when downloading?
A named list of SpatRaster
s of weather data cropped to the extent of the template.