Fetch NASA POWER Data for Multiple Locations with a Progress Bar

This function downloads daily NASA POWER data for specified weather variables over a specified number of days around a given date column for multiple locations. It includes a progress bar to show the download progress.

Usage

get_nasapower(
  data,
  days_around,
  date_col,
  study_col = "study",
  pars = c("T2M", "RH2M", "PRECTOTCORR", "T2M_MAX", "T2M_MIN", "T2MDEW"),
  direction = "both"
)

Arguments

data

A data frame containing the input data, including columns for latitude, longitude, and the date column.

days_around

An integer specifying the number of days before and after the date in the date column to download data.

date_col

A character string specifying the name of the date column in the data frame.

study_col

A character string specifying the name of the column containing the study identifier in the input data frame (default: "study").

pars

A character vector specifying the weather variables to fetch from NASA POWER (default: c("T2M", "RH2M", "PRECTOTCORR", "T2M_MAX", "T2M_MIN", "T2MDEW")).

direction

Character string specifying the direction of the date range relative to the reference date. Options are "both" (default), "back", or "forth". "back" retrieves data from date - days_around to date. "forth" retrieves data from date to date + days_around. "both" retrieves data from date - days_around to date + days_around.

Value

A data frame with the downloaded weather data from NASA POWER, combined for all specified locations. Includes a variable study indicating the study identifier from the input data. Returns an empty data frame if no data is retrieved.

Details

The function uses the get_power function from the nasapower package to fetch weather data for a range of dates around the specified date column for each location. A progress bar is shown during the data download process, and the results are combined into a single data frame.

See also

Other Disease modeling: get_brdwgd(), get_era5(), windowpane()