rdwd v1.2.0

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Select and Download Climate Data from 'DWD' (German Weather Service)

Handle climate data from the 'DWD' ('Deutscher Wetterdienst', see <https://www.dwd.de/EN/climate_environment/cdc/cdc.html> for more information). Choose files with 'selectDWD()', download and process data sets with 'dataDWD()' and 'readDWD()'.

Readme

rdwd

rdwd is an R package to select, download and read climate data from the German Weather Service (Deutscher Wetterdienst, DWD).
The DWD provides thousands of datasets with weather observations online at opendata.dwd.de.
Since May 2019, rdwd also supports reading the Radolan (binary) raster data at grids_germany.

rdwd is available on CRAN: CRAN_Status_Badge downloads Rdoc "rdwd dependencies"

It has been presented at FOSDEM 2017 and UseR!2017 in Brussels, featured in Rstudios data package list and written about in OSOR.

Documentation

A vignette with more information, examples, use cases and an interactive map of the DWD stations can be found at https://bookdown.org/brry/rdwd

Usage

Usage for observational weather data from the measuring stations usually looks something like the following:

# Download and install (once only):
install.packages("rdwd")

# Load the package into library (needed in every R session):
library(rdwd)

# select a dataset (e.g. last year's daily climate data from Potsdam City):
link <- selectDWD("Potsdam", res="daily", var="kl", per="recent")

# Actually download that dataset, returning the local storage file name:
file <- dataDWD(link, read=FALSE)

# Read the file from the zip folder:
clim <- readDWD(file, varnames=TRUE)

# Inspect the data.frame:
str(clim)

For data interpolated onto a 1 km raster, including radar data up to the last hour, see the corresponding chapter in the vignette.

Installation

Normal

install.packages("rdwd")

Latest version

if(!requireNamespace("remotes", quietly=TRUE)) install.packages("remotes")
remotes::install_github("brry/rdwd")

Full

Suggested (not mandatory) dependencies:

install.packages("rdwd", dependencies="Suggests")
  • RCurl for indexFTP and selectDWD(..., current=TRUE)
  • data.table for readDWD(..., fread=TRUE)
  • raster, R.utils, ncdf4, dwdradar for readDWD with gridded data
  • readr for readDWD.stand(..., fast=TRUE)
  • knitr, rmarkdown, testthat for recreating the vignette and local testing
  • leaflet, OSMscale for interactive/static maps, see OSMscale installation tips

Note: on Linux (Ubuntu), install RCurl via the terminal (CTRL+ALT+T, note lowercase rcurl):

sudo apt install r-cran-rcurl

Functions in rdwd

Name Description
lldist distance between lat-long coordinates
indexFTP Create a recursive index of an FTP Server
dataDWD Download data from the DWD CDC FTP Server
readDWD.stand read subdaily/standard_format dwd data
readDWD.raster read dwd gridded raster data
projectRasterDWD project DWD raster data
rdwd Handle Climate Data from DWD (German Weather Service)
readDWD.multia read multi_annual dwd data
readDWD.meta read dwd metadata (Beschreibung*.txt files)
runLocalTests run local tests of rdwd
checkSuggestedPackage check suggested package for availability
createIndex Create file and meta index of the DWD CDC FTP Server
selectDWD Select data from the DWD CDC FTP Server
findID find DWD weather station ID from name
dirDWD directory management for rdwd
readDWD.data read regular dwd data
metaInfo Information for a station ID on the DWD CDC FTP server
localtestdir local test data directory
nearbyStations Find DWD stations close to given coordinates
readDWD.binary read dwd gridded radolan binary data
index Indexes of files and metadata on the DWD CDC FTP server
readDWD Process data from the DWD CDC FTP Server
readDWD.nc read dwd netcdf data
newColumnNames Enhance readDWD column names
release_questions Reminders when using devtools::release
rowDisplay Create leaflet map popup from data.frame rows
readDWD.radar read dwd gridded radolan radar data
updateIndexes update rdwd indexes
readDWD.asc read dwd gridded radolan asc data
readVars Process data from the DWD CDC FTP Server
readMeta Process data from the DWD CDC FTP Server
DEU Map of German states (Bundeslaender) from GADM through the raster package
EUR Map of Western European countries through the rworldmap package
checkIndex check indexes
addBorders add country and Bundesland borders to a map
dwdparams DWD parameter explanations
dwdbase DWD FTP Server base URL
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Vignettes of rdwd

Name
hex.png
rdwd.Rmd
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Details

Date 2019-10-27
SystemRequirements Pandoc (>= 1.12.3), pandoc-citeproc
License GPL (>= 2)
Encoding UTF-8
URL https://github.com/brry/rdwd
RoxygenNote 6.1.1
BugReports https://github.com/brry/rdwd/issues
VignetteBuilder knitr
NeedsCompilation no
Packaged 2019-10-27 23:34:00 UTC; berry
Repository CRAN
Date/Publication 2019-10-28 05:40:11 UTC

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