Terrain Data Analysis

Digital terrain and elevation model analysis functions, including profile, gradient, line-of-sight, and viewshed calculations

Functions

`gradientm`	Gradient, slope, and aspect of data grid
`los2`	Line-of-sight visibility between two points in terrain
`viewshed`	Areas visible from point on terrain elevation grid

You can use regular data grids of elevation data to answer questions about the mutual visibility of locations on a surface (intervisibility).