Creates several rasters of bathymetric derivatives:

1. Benthic Position index (BPI) fine and broad scale
2. Hillshade, Slope and Aspect
3. Classified bottom features using 1. and 2. and a classification table
4. Terrain ruggedness, using the vector ruggedness measure (VRM)

Jessica Nephin
Affiliation: Fisheries and Oceans Canada (DFO)
Group: Marine Spatial Ecology and Analysis
Location: Institute of Ocean Sciences
Contact: e-mail: jessica.nephin@dfo-mpo.gc.ca | tel: 250.363.6564

Spatial Analyst, utils.py, config.py and BPI_functions.py

1. To run BPI.py without modification your files must be in the following directory structure:

/<parent_folder>    
        /Scripts    
        |       ---utils.py    
        |       ---config.py   
        |       ---BPI_functions.py   
        |       ---BPI.py    
        /Bathy    
        |       ---<name_of_bathymetry_rater>.tif
        /Classify
                ---<name_of_classify_table>.csv

2. <name_of_bathymetry_rater> must be of the format 'basename_res.tif'
3. Set 'basename' and 'res' variables in Global options line 32
4. Run in python window from /Scripts working directory

Based off scripts in the Benthic Terrain Modeler (BTM) 3.0 for ArcGIS authored by Dawn J. Wright, Emily R. Lundblad, Emily M. Larkin, Ronald W. Rinehart, Shaun Walbridge, Emily C. Huntley

Sappington et al., 2007. Quantifying Landscape Ruggedness for Animal Habitat Analysis: A Case Study Using Bighorn Sheep in the Mojave Desert. Journal of Wildlife Management. 71(5): 1419 -1426.

Weiss, A. (2001). Topographic position and landforms analysis. Poster Presentation, ESRI User Conference, San Diego, CA, 64, 227-245. https://doi.org/http://www.jennessent.com/downloads/TPI-poster-TNC_18x22.pdf