Abstract: A methodology is presented for the spatialization and regularization of geological data in developing a volume visualization system of mineral deposits. In the process of spatialization, drill holes are treated as a series of broken lines with the spatial direction, and the grade at a point is obtained through layering of the deposit with one meter depth. The regularization of geological data is realized using the Shepard method with the regionalization of mineralization taken into account through geostatistical variograms. A case of underground iron ore mine is studied to verify and validate the methodology.