The EU FP7 project MESMA has focused on marine spatial planning and aimed to produce integrated management tools (concepts, models and guidelines) for Monitoring, Evaluation and implementation of Spatially Managed marine Areas, based on European collaboration. Within the area “Useful Data Portals”, a list of names of other systems is provided along with a short description and direct hyperlink, while in the section “Useful Documents” there are descriptions and hyperlinks to main useful guidelines, methodologies and documents relating to Marine Spatial Planning. In the MESMA Geoportal any user can select a layer name to see related information, including metadata and downloadable GIS data if available.