\section{IMPLEMENTATION AND EXPERIMENTS}%Hakima

The whole system has been originally developed in the COGIT laboratory where it has been implemented. This system is in operational practice and has been connected to the framework OXYGENE \cite{oxygene} of this laboratory. A methodology for its validation has been developed and has proved that the mechanisms are efficient, even if some rejection can be avoid with a better scheduling. The genetic algorithm engine is still under development and validation and it will improve the quality of the whole system.\\

An experiment has been developed on the IGN GDB concerning the Angers French town zone. Using some matching technique  between two of these GDB from 1994 and 1996, we have built a set of updating informations. A {\it precision} indicator is computed as the rate between the right decisions and all the decisions taken by the EVOLA system. From a specific experiment based on 30 canonical operations, we have obtained a precision indicator equal to 0.948 which is sufficient to validate the whole processus. A detailed description about validation can be find in \cite{hkdphd}.   

