Glossary for Geospatial Science

TIN elements:  TNTmips TIN objects contain four element types: nodes, edges, triangles, and hulls.  Nodes are the most fundamental element of a TIN and the only element type that references spatial coordinates (x,y,z).  An edge is an oriented line segment that connects two nodes.  Three edges connect three nodes to form a triangle that satisfies the Delaunay criterion.  Triangles represent elementary areas of the surface that describe topological relationships between all other elements of the TIN data.  A hull represents the area covered by a TIN structure.  Interpolation of z-values is only valid within a hull region.