1. A method of establishing an uncertainty for obtained values of a one-dimensional logging parameter mapped to a three-dimensional volume, comprising: relating the obtained values of the logging parameter to a volumetric parameter of the three-dimensional volume; obtaining a set of representative data points relating the obtained values of the logging parameter to the volumetric parameter; obtaining a plurality of regression curves related to the set of representative data points, wherein obtaining a regression curve includes: (i) adding a random error to the set of representative data points to obtain a set of randomized data points, and (ii) performing a regression analysis using the set of randomized data points; and using the plurality of regression curves to establish the uncertainty for the values of the logging parameter in the three-dimensional volume.