Abstract
Spatial stochastic modelling of fracture fields requires the determination of a large number of spatial parameters from data sets of diversified origin (outcrops, open cuts, mining galleries or boreholes). In order to face up to this variety, the authors suggest several modelling processes suitable for some data structures. Field information comes essentially either from one or several rock walls or from a set of separated outcrops. In the case of rock walls, three methods are proposed and compared, two of them concerning sites which enable dip and strike measurements to be made, the third one being used when only photographs are possible. Still another method deals with the case of outcrops. The case of borehole data is considered as the result of a special vertical sampling similar to linear sampling on a rock wall.
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