TIN (TRIANGULATED IRREGULAR NETWORK)

A digital data structure used in a geographic information system (GIS) and other software applications for the representation of a surface. A TIN is a vector-based representation of a physical surface, made up of irregularly distributed three dimensional (3D) nodes with lines linking each node to its neighbors, forming a 3D structure of non-overlapping triangles. Each triangle can be considered a face onto which digital imagery can be projected to provide an amazingly real 3D digital model.

TIN’s are also the foundation from which terrain contours are generated, accurate slope and volume calculations are done.

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