The orthophotomaps at a scale of 1:5000 of Madeira Islands were made from a digital aerial survey with acquisition of digital photographs with a resolution of 30 cm. The flights were performed between July and September 2010 in three missions.
This layer represents the anual Significant wave height (Hz) to the buoys managed by the Associação para o Estudo do Ambiente Insular (AEAI).
The Harbour area corresponds to the vector delimitation, using photointerpretation, of the area occupied by the port infrastructure. The vectorization was based on the orthophotomaps produced by the Regional Secretariat for Science, Technology and Equipment, at 1:5000 scale to the islands of the eastern and central groups and orthoimagery obtained from satellite images on the same scale to the western group. They served to support the vectorization of the ports areas delimitations included in the Integrated Coastal Marine Management plan (POOC).
The orthophotomaps at a scale of 1:5000 of Desertas Islands were made from a digital aerial survey with acquisition of digital photographs with a resolution of 30 cm. The flights were performed between July and September 2010 in three missions.
The orthophotomaps at a scale of 1:5000 of Selvagens Islands were made from an analog aerial survey performed in August 2006. In the 2009 Selvagens Islands campaign triangulation stations were used, coordinated by the Hydrographic Institute in WGS84, for GGPS, having been reduced to ITRF2005 (GRS80), by the Faculty of Sciences of the University of Lisbon. The calculation of estimated positions was carried out based on a global network of about 200 stations (mostly IGS).
The delimitation of areas for extraction and dredging of inert materials in the seabed comes from the need to regulate the economic exploitation of the region's territorial sea and at the same time create an indispensable discipline to ensure the sustainable management of existing water resources in a context of economic stability and sustained development of economic sectors.