GemCom GemCom Software uses raw drill hole data, surface data (geochemistry, topography), and other data to create a variety of maps, sections, 3D solids and other tools for research, especially in mining and environmental projects. Robust 3D modelling and visualization, block modelling feature and display, and database management are some of the important features of GemCom. TerraCAD's experts are proficient in the many uses of GemCom, competent in generating databases in Surpac, and able to produce data transfer filters to act as bridges between the two programs.