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Among the most common data structures that have been proposed for the creation of Digital Elevation Models (DEMs),two are the most common, namely the Grid and the TIN (Triangular Irregular Network). TRI is a separate application in which you can create, edit and visualize such DTMs.
The engine is robust enough to process and triangulate over 100000 points in less than 3 seconds (using a typical computer). The program includes break-lines and hole insertion possibilities, volume calculations operations and also provides several filtering algorithms (points, breaklines, triangles filters etc.) for smoothing the surveyor’s inserted data.