Weather Reader

Basic docker image and scripts to read geotiff and grib2 files at selected longitude/latitude using python 3. It can read both tiff and grib2 files based on their extension.

Usage

The scripts are very basic and were only tested with grib files from Meteo France and NOAA. Tiff files were only tested with Meteo France export with a single value encoded in the image.

Geotiff

python3 tiff_reader.py ${FILE_PATH} --pos=latitude,longitude

• ${FILE_PATH}: path to file to read`
• latitude, longitude: coordinates to get value
• Option -o to save output to a file, default to stdout

The output is in csv format, to handle future multiple coordinates to output at once.

Alternatively, a -csv flag can be given instead of --pos to read a csv file containing latitude and longitude columns. Read values will be appended to the csv for each row.

python3 tiff_reader.py  --csv=${POSITIONS.csv} ${FILE_PATH}

Grib2

python3 grib_reader.py --pos=latitude,longitude ${FILE_PATH}

• ${FILE_PATH} path to file to read`
• Option --data: extract selected data from file, e.g: '2 metre temperature'. A list separated by commas can also be given, e.g: '2 metre temperature,Mean sea level pressure'
• Option --level: extract values at selected levels. A list separated by commas can also be given, e.g: '2 metre temperature,Mean sea level pressure'
• latitude, longitude: coordinates to get value
• Option -o to save output to a file, default to stdout

Example:

python3 grib_reader.py --data='2 metre temperature' --pos=50.136000,1.834000 ${FILE_PATH}

Alternatively, a --csv flag can be given instead of --pos to read a csv file containing latitude and longitude columns. Read values will be appended to the csv for each row:

python3 grib_reader.py --data '2 metre temperature' --csv=${POSITIONS.csv} ${FILE_PATH} 

With docker image

docker pull jfyuen/pyweather
docker run --rm -v ${SCRIPT_PATH}:/srv/ jfyuen/pyweather python3 /srv/reader.py /srv/${FILE_PATH}

• ${SCRIPT_PATH} is where the reader script and files to analyze are both located, they are to be mounted as a volume in docker.
• ${FILE_PATH} is the relative file path to read from ${SCRIPT_PATH}

With Debian

# apt-get install -y python3-grib python3-rasterio python3-scipy python3-matplotlib python3-pandas

TODO

• When scripts are stable, embed them in the docker image
• Handle mutliple location to be exported at once
• Add a requirements.txt