The OP²EX.ia project is a “Tool for Mission Preparation and Preview of the Indoor Environment with Artificial Intelligence” (Outil de Préparation de mission et de Prévisualisation de l’Environnement eXtérieur grâce à l’Intelligence Artificielle). This tool aims to support the mission preparation process. When preparing for a land-based military operation, it may be necessary to analyse high-resolution satellite images and terrain topology. Extracting the relevant information may require the intervention of a lot of people. It is a time-consuming and tedious task, particularly because of the multiplication of actors, the density of the information, the means of obtaining this information, and the complexity of the mission. Time is also crucial as some missions may request flexibility and reactivity from special forces and commando groups.