ESTIMATION OF INDIVIDUAL FEATURE SURFACE-AREA WITH THE VERTICAL SPATIAL GRID

The area of an individual bounded surface (e.g. the boundary of a prop erly sampled cell) can be estimated from an isotropic uniform random s tack of parallel sections, or of non-invasive planar scans, using the well-known spatial grid. A standing problem was to estimate the area o f an individual bounded surface with an arbitrary degree of accuracy f rom a vertical (i.e. not isotropic) stack of sections or scans. A new tool to do this, called the 'vertical spatial grid', is presented.