Uses data from https://opendata.dwd.de/climate_environment/CDC/grids_germany/return_periods/precipitation/KOSTRA/ published by the German meteorological service (DWD). KOSTRA is a data set, that provides reference values for heavy precipitation, extrapolated from records lasting 60 years.
This repository uses the current data set KOSTRA-DWD-2010R from 2017.
The code uses a location as input to determinate coordinates by using plus.codes-website. Then it searches for the right grid field, in which the coordinates are located in, and extracts and saves the precipitation heights using the tables in the DWD_heights-folder.
The algorithm to determine the grid index is improved over the original from the xlsx-file, so that it can handle coordinates inbetween to grid fields.
It can be called from commandline using python code.py or from another function with code.main(location, return_period).