Topography and Bathymetry in Alaska

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Topography and Bathymetry in Alaska

• Kirk Waters
• Alaska Wave Climatologies Workshop

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CSC Topography and Bathymetry Efforts
CSC Topography and Bathymetry Efforts
Existing LiDAR beach coverage (blue) enlarged
for visualization
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JALBTCX Data On-line
Spring 2004
Fall 2004
500 meters landward topography 1000 meters
seaward bathymetry Plan to cover CONUS oceanfront
where there is sand.
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Current Topography Projects

• Gulf of Mexico
• IfSAR
• Large part Florida to Louisiana
• 5 meter grid, 1 meter RMSEz
• Lidar
• Mississippi
• 2 full counties
• 5 meter spacing
• Florida
• Santa Rosa County
• 2 meter spacing
• ADS40
• Florida Greenway
• 2 meter grid
• 50 cm RMSEz

• Other
• Oahu
• Lidar, 2 meter spacing
• Cloud issues
• Main eight islands with IfSAR in FY2006
• Coastal Connecticut
• Lidar and photography for Phragmites
• USACE topo/bathy
• Distribution only
• Maryland
• Lidar Distribution only

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Lidar Topography in Shishmaref and Kivalina

• Data collected by Aerometric via NOAA/NGS
  contract
• July and August 2004
• Multiple collections done. Some two-meter
  resolution, some one-meter resolution.
• Classified for bare earth.
• Will be available on-line
• Approximately 750 million points

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Lidar Topography at Kivalina
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NOS Alaska Hydro Surveys
NGDC holdings
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T-Sheets and Shoreline
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T-sheet zoom
What else should we vectorize?
Tundra
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T-sheet Status
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Cape Edgecumbe Lidar Topo/Bathy NGS Data Fusion
study
Image credit Jon Swallow
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Experiment Objectives

• Collect Topographic and Bathymetric information
  safely and at same temporal scale
• Provide NOAA Ship Rainier with shoreline and near
  shore hydrographic data within days of
  acquisition
• Test a new concept of survey operations

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Topo LIDAR
Bathy LIDAR
Topo/Bathy LIDAR Merged with NOAA Chart
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Topo LIDAR MHW Shoreline
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Hydrographic Soundings (fathoms) Topographic
Elevations (feet)
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Summary

• The Coastal Services Center has coastal
  topography available for most of CONUS.
• The shoreline for Alaska has been vectorized from
  T-sheets where they exist.
• More information might be obtainable from the
  T-sheets if we can determine what is needed.
• Limited high-resolution topography exists, but
  there is data for Shishmaref and Kivalina
• Combining technologies can provide a seamless
  elevation dataset across the land-water interface.