Extracts direction of velocity vectors from Tuflow outputs.
This script works on Windows machines with a standard installation of Python. It utilizes executable Tuflow utilities RES_to_RES and TUFLOW_to_GIS.
- Download or clone this repository.
- Run the
extract_vdir.pyscript. This will open a GUI. - Use the GUI to select the directory containing the target Tuflow run results, e.g. for Tuflow run number
21the\results\21\directory should be selected. (One output raster is produced for each subdirectory/run, using the last timestep of each run.) - Press the big button (
Create Velocity Direction Rasters) and be patient. Progress will be printed out to the command line as well as a logfile in the directory of this repository.
Output rasters are saved to the same directory as the extract_vdir.py script in the ASCII format, using the same name convention as the corresponding Tuflow run with a suffix _V_dir.asc.
Note: Velocity direction in degrees from North: e.g. North = 0, East=90, West=-90, South=180/-180.
https://pro.arcgis.com/en/pro-app/help/data/imagery/vector-field-function.htm
ArcGIS Pro -> Imagery tab -> Raster Functions -> Raster Functions (opens on the right) -> Conversion -> Vector Field
Select:
Raster 1 = magnitude, Raster 2 = direction
Input Data Type = Magnitude-Direction-Input
Angular Reference System = Geographic
Output Data Type = whatever is suitable