Dowd, P.Ramani, R.2017-04-022017-04-021986Proceedings of The 19th International Symposium on the Application of Computers and Operations Research in the Mineral Industry (APCOM), as published in proceedings of the APCOM International Symposium., 1986 / Ramani, R. (ed./s), pp.81-9408733350580741-0603http://hdl.handle.net/2440/104117In practice, many geological controls in automatic or semi-automatic estimation and modelling are essentially geometrical controls. The presents two techniques for geological/geometrical control. Both techniques are types of estimators and/or interpolators of shapes. The first is a method for fitting spline surfaces to control orebody boundary estimation and unroll orebodies. The second is an application of Minkowski addition to interpolate shapes such as orebody outlines or stope boundaries and to control estimations.enCopyright status unknownConference paper00300663792-s2.0-00228768132-s2.0-0023010993115366Dowd, P. [0000-0002-6743-5119]