Digital Terrain Model

DTM is a mathematical representation of a spatial distribution of a certain characteristic related to a real surface. The surface is, in general, continuous and the phenomena it represents can be diverse.

To represent a real surface in a computer it is essential elaborate and create a digital model that can be represented by analytical equations or a point grid in a way to transmit to user the spatial characteristics of a terrain.

The creation of a numeric model corresponds to a new manner to focus in the problem of project elaboration and implementation. From models (grids) it can be calculated directly: volume, areas, profiles and transversal sections, generate shadowed images or in gray levels, generate slope and aspect maps, generate slicing in desired intervals.

The picture below show regular flows to create TIN and DTM.