GribInfo: Get grib file inventory.

Description

Find out what model, date, levels, and variables are contained in a grib file.

Usage

GribInfo(grib.file, file.type = "grib2")

Value

grib.info: Inventory of the grib file. If the input is in grib2 format, you also get the grid definition.

Arguments

grib.file: Full path to a grib file.
file.type: Whether the file is in grib2 format ("grib2") or grib format ("grib").

Author

Daniel C. Bowman danny.c.bowman@gmail.com

Details

This function allows you to find out what is inside an unknown grib file. It does this by performing a system call to wgrib2 or wgrib.

Examples

Run this code


if (FALSE) {
#An example for the Global Forecast System 0.5 degree model

#Get the second latest model url, for stability
urls.out <- CrawlModels(abbrev = "gfs_0p50", depth = 2)

#Get a list of forecasts, variables and levels
model.parameters <- ParseModelPage(urls.out[2])

#Figure out which one is the 6 hour forecast
#provided by the latest model run
#(will be the forecast from 6-12 hours from the current date) 

my.pred <- model.parameters$pred[grep("06$", model.parameters$pred)]

#What region of the atmosphere to get data for
levels <- c("2 m above ground", "800 mb")

#What data to return
variables <- c("TMP", "RH") #Temperature and relative humidity

#Get the data
grib.info <- GribGrab(urls.out[2], my.pred, levels, variables)

#Print out the inventory - it should match the requested data
grib.inv <- GribInfo(grib.info[[1]]$file.name, "grib2")
}

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