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.