The Integrated Mapping FOr the Sustainable Development of Ireland's MArine Resource (INFOMAR) programme is a joint venture between the Geological Survey Ireland (GSI) and the Marine Institute (MI). The Grab Sample shapefile dataset is an auxillary dataset used for ground truthing which is essential in the production of sediment classification maps. Samples are collected on an ongoing adhoc and targeted basis. Samples are collected onboard research Vessels, Analysised onboard but also further analysed on shore for Partical Size Analyisis (PSA). Samples are logged and ssave as a database along with spatial information. Data is compiled in a shapefile database and stored in an online sharpoint location shared with joint partners GSI. The Grab Sample shapefile dataset is an auxillary dataset used for ground truthing which is essential in the production of sediment classification maps