GIS Dictionary
Definitions for GIS terms related to operations such as analysis, GIS modeling and web-based GIS, cartography, and Esri software.
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face
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[Euclidean geometry]
A planar surface of a geometric shape, bounded by edges. 
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[3D analysis]
In a TIN, the flat surface of a triangle bounded by three edges and three nodes. Faces do not overlap; each face is adjacent to three other faces of the TIN. A face defines a plane with an aspect and slope. 
