1. Geologic Sea-Floor Mapping: Marine Data Model Case Study Brian Andrews-USGS, Woods Hole, MA Seth Ackerman-CZM, Woods Hole, MA

2. Presentation Overview Project Overview & Goals Data Types Data Model Methods Current Status Future Research

3. Project Overview USGS/CZM Cooperative 1 of 3 areas (Boston, South Essex, & Cape Ann) Regional geologic sea-floor mapping Characterize the surface and subsurface sea floor

5. Survey area = 123 km 2 Survey lines = 970 km Lane spacing = 100m Depth range = 0-55m South Essex Survey Area

6. Data Types Geophysical Data 1.Interferometric-sonar bathymetry (swath) 2.Interferometric-sonar backscatter (swath) 3.Sidescan-sonar backscatter 4.Seismic-reflection profile 5.RTK/DGPS Navigation (x,y,z) Ground Validation 6.Bottom photography (still & video) 7.Sediment samples (grain size)

7. Data Flow B.D. Andrews, USGS,28 June 04 Swath Bathymetry Raster Depth Backscatter Sidescan-Sonar Raster Backscatter Mosaic Seismic Profile Vector Depth to reflector (x,y,z 1,z 2,z 3..) Sediment Samples Vector (x,y,z-grainsize) Bottom Video/Stills Vector (x,y) Process Phase Raster (2,5,10m) Hillshade Slope Roughness Backscatter Vector Contours Raster (< 1m) Reclassified image Raster (25+m) Interpolated Surface Profiles (jpgs) Raster (25+m) Interpolated Surface (Grain Size) Ground Validation Mpeg /station Bottom stills Preliminary Analysis Phase Reclassified Raster Based on Slope Roughness Backscatter How is subsurface stratigraphy related to seafloor morphology? Modeling Phase ??? ArcGIS 9.0

8. Existing MDM

9. USGS MDM

10. USGS Marine Data Model

11. Marine Data Model

12. Geodatabase Raster Catalog Measurement Table Survey Tracklines (4 data types) Relationship Class

15. USGS MDM Status/Lessons Learned Just do it Data management of ground validation points Useful for topological update (feature class) Annotation classes Simplify USGS Open File Report process.

16. Future Research How can the relationship class help us with spatial relationships? How do we extract the high-res data from rasters? Interpolation of seismic profile data in Geostatistical Analyst How do we manage geologic interpretations in MDM? Talk to the Geology Data Model Crew Publish USGS Open File Report Spring 2005

17. AB C D

18. Brian Andrews bandrews@usgs.gov Seth Ackerman seth.ackerman@state.ma.us