developments and benefits of hydrographic survey using multispectral imagery

Developments and Benefits of Hydrographic Surveying Using

Multispectral Imagery - GSI Case Study

Helen Needham, Proteus hn@proteusgeo.comRobert Carroll, Proteus rc@proteusgeo.comwww.ProteusGeo.com +1(585)210 0090

Photo Some rights reserved by Nataraj Metz

Hydrographic Data

Accurate and current hydrographic data is crucial for:● Navigation charts● Environmental

assessment● Coastal Engineering● Dredging● Near-shore projects● Natural disaster risk

assessment● UNCLOS territorial

claim

Hydrographic Data Challenges: Collection

Hydrographic Data Challenge:Available Coverage/Currency

Hydrographic Data Challenge:"White Strip" limitations

New Approach to Bathymetric Survey: Satellite Imagery

Imagery Multispectral Capabilities

EOMAP MIP System (Modular Imagery Processing)

Bathymetric Survey

Seabed Classification

Water Quality: TSM

Water Quality: Turbidity

Water Quality: Chlorophyll

Water Quality: Coloured Dissolved Organic Material (CDOM)

Water Quality: Light Absorption (Z90 MAX)

Geological Survey of Ireland & INFOMARThe INtegrated Mapping FOr the Sustainable Development of Ireland’s MArine Resource (INFOMAR) programme is a joint venture between the Geological Survey of Ireland and the Marine Institute. The programme is a successor to the Irish National Seabed Survey (INSS) and concentrates on creating a range of integrated mapping products of the physical, chemical and biological features of the seabed in the near-shore area.

GSI: Planned Lidar Survey Areas (Red)

GSI: Successful Lidar Collections

GSI: First Satellite Bathymetry RFP

Wexford Bay Trail Project

Wexford Bay in Google Earth

Wexford Bay: Ground Truthing

Conclusions:

● Existing collection methods costly and not timely

● New satellite imagery / processing expanding products

● Timely, low-cost accurate products