This approach will be useful for what concerns the knowledge of the different characteristic zones in relation to the stability of the ground in a general way, as well as the consolidation of the portion of ground considered here we will insist more on the influence of the pre-existing structures in a ground which will be the object of our study I site here the ground with predominance of limestones. The reading of this work will facilitate the comprehension of the concept on the distribution by applying the principle of bayes