Method for exploiting a subsoil deposit comprising at least one outcrop, wherein the following steps are carried out: a) at least two georeferenced photographs of said outcrop are acquired, taken from different positions; b) a three-dimensional representation of said outcrop is constructed from said georeferenced photographs (R3D) by using photogrammetric reconstruction software; c) at least one characteristic of said outcrop is determined by means of said three-dimensional representation of the outcrop, said determination using an image processing method on said three-dimensional representation performed by computer and comprising a first step of recognizing facies and a second step of constructing lines and surfaces (GEOL); d) a geological model of said subsoil deposit is constructed; and e) said subsoil deposit is exploited by implementing an exploitation scheme defined by means of said geological model; the method being characterized in that: said determination of at least one characteristic of said outcrop also comprises a statistical analysis (STAT) of said three-dimensional representation of said outcrop so as to determine at least one set of geostatistical parameters to constrain said geological model of said subsoil deposit, said set of geostatistical parameters consisting of proportion curves and proportion matrices of the constitution of the ground interpreted on said outcrop and the variograms thereof as a function of the distance; and said geological model of said subsoil deposit is constructed by means of said characteristic of said outcrop and of said set of geostatistical parameters to constrain said geological model; a) at least two georeferenced photographs of said outcrop are acquired, taken from different positions; b) a three-dimensional representation of said outcrop is constructed from said georeferenced photographs (R3D) by using photogrammetric reconstruction software; c) at least one characteristic of said outcrop is determined by means of said three-dimensional representation of the outcrop, said determination using an image processing method on said three-dimensional representation performed by computer and comprising a first step of recognizing facies and a second step of constructing lines and surfaces (GEOL); d) a geological model of said subsoil deposit is constructed; and e) said subsoil deposit is exploited by implementing an exploitation scheme defined by means of said geological model; the method being characterized in that: said determination of at least one characteristic of said outcrop also comprises a statistical analysis (STAT) of said three-dimensional representation of said outcrop so as to determine at least one set of geostatistical parameters to constrain said geological model of said subsoil deposit, said set of geostatistical parameters consisting of proportion curves and proportion matrices of the constitution of the ground interpreted on said outcrop and the variograms thereof as a function of the distance; and said geological model of said subsoil deposit is constructed by means of said characteristic of said outcrop and of said set of geostatistical parameters to constrain said geological model; said determination of at least one characteristic of said outcrop also comprises a statistical analysis (STAT) of said three-dimensional representation of said outcrop so as to determine at least one set of geostatistical parameters to constrain said geological model of said subsoil deposit, said set of geostatistical parameters consisting of proportion curves and proportion matrices of the constitution of the ground interpreted on said outcrop and the variograms thereof as a function of the distance; and said geological model of said subsoil deposit is constructed by means of said characteristic of said outcrop and of said set of geostatistical parameters to constrain said geological model;