Abstract
Software package for working with heterogeneous 3-D velocity models in both forward and inverse modelling including anisotropy. General 3-D velocity models are composed of heterogeneous isotropic or anisotropic layers or blocks separated by curved interfaces.
Velocity models may contain isolated bodies, pinchouts, etc. The elastic parameters inside the layers or blocks may vary in all three dimensions.
Attenuation and non-planar topography can be considered. Package MODEL contains subroutines and programs for specification of velocity models and for basic calculations in the velocity models.
Package MODEL contains programs for velocity model smoothing, data fitting by inversion including fitting and smoothing GOCAD models, conversion of velocity model parametrization, triangulation of structural interfaces, VRML and GOCAD visualization.