Considering the consequences of the world-wide degradation of mangrove forests for their unique biodiversity, for coastal protection, for the fisheries, for timber and non-timber forest products and for the human subsistence populations living within and beyond the mangrove, it is increasingly important to assess and to monitor these semi-terrestrial forests growing at the edge of land and sea. Mangroves in good conditions should be protected, whereas degraded forests should be restored. This Special Issue will focus on geomatic tools such as airborne and space-borne remote sensing, analyses in a GIS environment (change detection, assessment of sea-level-rise effects using digital terrain models, hydrodynamic modelling).