What is Triangulated Irregular Network (TIN)?

Triangulated Irregular Network (TIN) is a vector-based topological data model is used to present the way the earth (terrain). The TIN present form of the earth's surface is obtained from the sample points are scattered irregularly and further break line, and form a triangular irregular network of interconnected. Each triangle consists of three vertices have coordinates x, y and elevation (z).
 
TIN will produce solid information in a complex area, and information on areas that are rarely homogeneous. Triangle always has three nodes and usually has three neighboring triangles, triangle on the edge but usually only have one or two neighbors.
 
The TIN is a DED (Digital Elevation Data) stored in a vector format, so to get a DEM (Digital Elevation Model), the TIN must be converted from vector format to raster format.
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