Instance both the make_geo_hierarchy module and the Viewer module and connect them to form the simple application below.
Select the make_geo_hierarchy module from the Modules pull down menu on the main window and Load the file "initial_soil_investigation_subsite.pgf". The image in your Viewer should be:
The surface that is shown is a TIN (Triangular Integrated Network = connected grid of triangles) created by connecting each of your borings as the corner nodes of triangles. Initially, it is the top surface across all of the borings. Once the top surface is written to the file the surface (or just portions of it) can be moved downward to represent the bottom of each successive hierarchical layer. Each boring in the pgf file results in a corner node (intersection) in this TIN.
Each intersection is demarked by either a white mesh sphere or a grey mesh sphere. This change in color is related to the current state of the boring which can be either Normal (white) or Locked (grey). This state limits the boring movement options and will be discussed in more detail below.
The first step when creating a geologic hierarchy is to select the material of the top surface. The surface at this point is colored according the selected material, if a boring existed that had a different material at its top elevation it could be set as the top material by changing the selected material in the "Material #: Material Name" list box. Since there is only one material present at the top surface for this PGF file, the correct material is selected by default. At this point, press the Write Surface button. This will create a GMF file consisting of the single surface just created. The file name by default is the PGF file name with the tag "_pgf" appended to the base file name.
After writing the top surface other options become available. The Method option should be selected first.