apsimx (version 2.8.0)

get_power_apsim_met: Get NASA-POWER data for an APSIM met file

Description

Uses get_power from the nasapower package to download data to create an APSIM met file.

Usage

get_power_apsim_met(lonlat, dates, wrt.dir = ".", filename = NULL)

Value

returns an object of class ‘met’ and writes a file to disk when filename is supplied.

Arguments

lonlat

Longitude and latitude vector

dates

date ranges

wrt.dir

write directory

filename

file name for writing out to disk

Details

This function requires the nasapower package version 4.0.0.

It looks like the earliest year you can request data for is 1984.

If the filename is not provided it will not write the file to disk, but it will return an object of class ‘met’. This is useful in case manipulation is required before writing to disk.

Examples

if (FALSE) {
require(nasapower)
## This will not write a file to disk
pwr <- get_power_apsim_met(lonlat = c(-93,42), dates = c("2012-01-01","2012-12-31"))
## Let's insert a missing value
pwr[100, "radn"] <- NA
summary(pwr)
## Check the met file 
check_apsim_met(pwr)
## Impute using linear interpolation
pwr.imptd <- impute_apsim_met(pwr, verbose = TRUE)
summary(pwr.imptd)
check_apsim_met(pwr.imptd)
}