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11 th International Symposium for GIS and Computer Cartography for Coastal Zones ManagementFigure 2: Data example of offshore geophysical data integrated with geotechnical borings, bathymetry and topography inArcScene (red/yellow vertical lines) to identify subsurface geological layers.ConclusionGlobally, we have constructed much of our infrastructure near ocean coasts. Although we continue to build infrastructurethat is more critical or involves more inherent risk – such as nuclear power generation stations, immensebridges, liquefied natural gas terminals, and taller buildings – we often have not fully explored the exposure of thisinfrastructure to offshore geohazards. When tolerances and design criteria may be insufficiently constrained, it becomescritical to better understand these risks.The improvements in offshore seismic geophysics have resulted in higher accuracy and resolution systems thanever before. These systems are now being successfully implemented to identify and study offshore faults, weakgeotechnical conditions, and other offshore hazards that may threaten some of this critical infrastructure. Twodimensionalseismic reflection surveys are successful in studying the location and extent of many geohazards, whilethree-dimensional seismic reflection surveys are the optimal choice for investigation of specific aspects these hazardsand understanding their potential impacts on our coastal infrastructure.However, use of this data relies heavily upon the ability to integrate data from multiple sources and disseminationof that data to a wide variety of users. A GIS platform is exceptionally well suited to integrating these disparate datasets as well as presenting them in a number of formats to meet the needs of each stakeholder.ReferencesEbuna, D., T. Mitchell, P. Hogan, S. Nishenko, and H.G. Greene (2013), “High-Resolution Offshore 3D SeismicGeophysical Studies of Infrastructure Geohazards”. Proceedings of the Symposium on the Application of Geophysicsto Engineering and Environmental Problems (SAGEEP 2013), Denver, USA.Geometrics (2012), “GeoEel Solid Streamer”, Geometrics, Inc., Retrieved January 15, 2013,http://www.geometrics.com/files/geoeelsolid.pdf.Geometrics (2013), “P-Cable HR3D Seismic Streamer System”, Geometrics, Inc., Retrieved March 25, 2013,ftp://geom.geometrics.com/pub/seismic/DataSheets/p-cable_data_sheet.pdf.Nishenko, S., P. Hogan, and R. Kvitek (2012), “Seafloor Mapping for Earthquake, Tsunami Hazard Assessments”.Sea Technology, 53(6):15–20.111