hillshade definition
A hillshade is a grayscale 3D model of the surface, with the sun's relative position taken into account for shading the image.This function uses the latitude and azimuth properties to specify the sun's position. The inputs for this function are the following: 1  Input DEM.2  Azimuth. 3  Altitude. 4  Scaling. 5  Z Factor. hillshade is a grayscale 3D model of the surface, with the sun's relative position taken into account for shading the image.