Function to calculate hillshade for a digital elevation model. Derives slope and aspect in radias to calculate shading value between 0 and 255 using a given lighting angle and altitude.
Altitude (angle above ground) and angle (direction/aspect) of lightsource can be given via args.
Derived using ESRIs hillshade algorithm, but uses simple GRADIENT function instead of Horns algorithm for slope calculation - factor 30 more efficient & no need for IP TB. (Thanks to Andrew Stevens)
Pls leave you feedback/rate.
Felix Hebeler (2023). Hillshade (https://www.mathworks.com/matlabcentral/fileexchange/14863-hillshade), MATLAB Central File Exchange. Retrieved .
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fixed small bug in the options parsing, clearified help.