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U.S. Geological Survey
Open-File Report 2007-1271

Seafloor Mapping and Benthic Habitat GIS for Southern California, Volume III

Table of Contents

Project Description

• Abstract
• Introduction
  • Figure 1. Map showing location of the study area in Southern California.
• Revisions
• File formats
• Acknowledgments
• References
• Contacts

Methods

• Sonar Data
  • Figure 2. Custom sonar mount.
• Sea Floor Video
  • Figure 3. Launch of the camera sled.
• Data Processing
• Seafloor Classification
  • Mega Habitat
  • Seafloor Induration
  • Meso/Macrohabitat
  • Modifier
  • Slope, Complexity, and Depth

Results

• Seafloor Features
  • Substrate
  • Common Biota
    • Figure 4. Video Observations for entire survey area.
  • Fish Biomass
  • Sand Ripples
    • Figure 5. Location map of sand ripple features in upper north corner of Channel East region.
    • Figure 6. At the deepest point of camera line 15. Here the ripples are more degraded by bioturbation.
    • Figure 7. The zone of transition between bioturbated seafloor and sand ripples in the center of camera line 15.
    • Figure 8. The shallowest point on camera line 15 where the seafloor is predominately sand ripples.
• Habitat Classification
  • Map
    • Figure 9. Map showing Habitat Classifications of Southern California (after Greene et al., 1999).
  • Habitat Classification Tables

Data Catalog

• Basemaps
  • Quick view of Survey tracks from one-minute navigation fixes
  • Metadata FAQ for tracks from one-minute navigation fixes
  • Quick view of Survey tracks from one-minute navigation fixes
  • Metadata FAQ for tracks from one-minute navigation fixes
• Habitat observations
  • Quick Views of dive habitat observations from Southern California
  • Meatadata FAQ for habitat observations from Southern California
• Bathymetry
  • Quick view of bathymetry of entire study area
  • Metadata FAQ for bathymetry of entire study area
  • Quick view of bathymetry for channel west region
  • Metadata FAQ for bathymetry of channwl west region
  • Quick view of bathymetry for channel central region
  • Metadata FAQ for bathymetry of channel central region
  • Quick view of bathymetry for channel east region
  • Metadata FAQ for bathymetry of channel east region
• Acoustic Backscatter
  • Quick view of bathymetry for channel west region
  • Metadata FAQ for bathymetry of channel west region
  • Quick view of bathymetry for channel central region
  • Metadata FAQ for bathymetry of channel central region
  • Quick view of bathymetry for channel east region
  • Metadata FAQ for bathymetry of channel east region
• Benthic habitat polygon shape file:
  • Quick Views of habitat types from Southern California
  • Meatadata FAQ for habitat types from Southern California
• PDF Maps:
  • Quick view of shaded relief of entire study area
  • Metadata FAQ for shaded relief of entire study area
  • Quick view of acoustic backscatter for the entire region
  • Metadata FAQ for acoustic backscatter for the entire region
  • Quick view of the Habitat Map for the entire region
  • Metadata FAQ for the Habitat Map for the entire region

Revision History