This package is used to produce wind terrain, shielding and topographic multipliers.

Python 2.7, NumPy, SciPy and GDAL are needed.

The script for deriving terrain, shielding and topographic multipliers is all_multipliers.py that links three modules: terrain, shielding and topographic.

Before running all_multipliers.py to produce terrain, shielding and topographic multipliers, the configuration file named multiplier_conf.cfg needs to be configured. There are some variables to be pre-defined:

• root: the working directory of the task.
• upwind_length: the upwind buffer distance

Then copy the input files (dem and terrain classes) into the input folder (created beforehand manually) under root, and start to run all_multipliers.py. The resutls are respectively located under output folder (created automatically during the process) under root.

This version is parallel implementation using PyPar for MPI handling. To run it in parallel mode: mpirun -np ncpu python all_mulitpliers.py, while ncpu is the number of CPUs adopted.