INSS INFOMAR Seabed Survey Shaded Relief

The integrated Mapping for the Sustainable Development of Ireland’s Marine Resource (INFOMAR) programme is a joint venture between the Geological Survey of Ireland (GSI) and the Marine Institute (MI). The programme is the successor to the Irish National Seabed Survey (INSS) and concentrates on creating integrated mapping products related to the seabed. Shadow relief is a Cartographic technique that provides an apparent three-dimensional configuration of the terrain on maps and charts by the use of graded shadows that would be cast by high ground if light were shining from the northwest. Shadow relief is usually used in combination with contours.