There are two options in Tecplot for gridding irregular data triangulation and interpolation. Triangulation Let's say that you have a random scattering of data on a three-dimensional surface. Since there is no connectivity specified in the file, Tecplot assumes this to be an I-ordered data set. At this point if we want to create a contour plot of the variable W we will need to specify connectivity between points. Tecplot's Triangulation option will do just that.
Triangulation is a process in which data points are connected to form triangles.
Select ZONE 1 as the source zone. Accept the default triangle keep factor of 0.25. Figure 3 Click compute. Turn off the Scatter plot layer and turn on the Contour plot layer. W as the contour variable.