npn_get_custom_agdd_raster: Get Custom AGDD Raster Map
In rnpn: Interface to the National 'Phenology' Network 'API'

npn_get_custom_agdd_raster

R Documentation

Get Custom AGDD Raster Map

Description

This function takes a series of variables used in calculating AGDD and returns a raster of the continental USA with each pixel representing the calculated AGDD value based on start and end date. This function leverages the USA-NPN geo web services.

Usage

npn_get_custom_agdd_raster(
  method,
  climate_data_source,
  temp_unit,
  start_date,
  end_date,
  base_temp,
  upper_threshold = NULL
)

Arguments

`method`	Takes "simple" or "double-sine" as input. This is the AGDD calculation method to use for each data point. Simple refers to simple averaging.
`climate_data_source`	Specified the climate data set to use. Takes either "PRISM" or "NCEP" as input.
`temp_unit`	The unit of temperature to use in the calculation. Takes either "Fahrenheit" or "Celsius" as input.
`start_date`	Date at which to begin the AGDD calculations.
`end_date`	Date at which to end the AGDD calculations.
`base_temp`	This is the lowest temperature for each day for it to be considered in the calculation.
`upper_threshold`	This parameter is only applicable for the double-sine method. This sets the highest temperature to be considered in any given day's AGDD calculation.