The very sharp reduction in usable farm area in Martinique over the last 30 years has led the local authorities to begin wide-reaching discussions on land management and to become concerned with the development of farm structures and the development of agricultural and rural land resources. The complexity of the land issue in Martinique necessitated the establishment in March 2001 of a mission of the General Council of the GREF to conduct an inventory, identify the causes for these changes and to propose solutions. Due to the CNASEA's level of expertise, it was asked to become involved with 3 projects set up along these lines: • SIGAM (Système d'information géographique agricole de la Martinique [Martinique Agricultural Geographic Information System]), • Martinique Crop Observatory, • Community studies for sustainable agricultural development.