Topography and Bathymetry in Alaska Kirk Waters Alaska Wave Climatologies Workshop.

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Presentation transcript:

Topography and Bathymetry in Alaska Kirk Waters Alaska Wave Climatologies Workshop

CSC Topography and Bathymetry Efforts ** Existing LiDAR beach coverage (blue) enlarged for visualization

JALBTCX Data On-line Spring 2004Fall meters landward topography 1000 meters seaward bathymetry Plan to cover CONUS oceanfront where there is sand.

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

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

Lidar Topography at Kivalina

NOS Alaska Hydro Surveys NGDC holdings

T-Sheets and Shoreline

T-sheet zoom Tundra What else should we vectorize?

T-sheet Status

Image credit: Jon Swallow Cape Edgecumbe: Lidar Topo/Bathy NGS Data Fusion study

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

Topo LIDAR Bathy LIDAR Topo/Bathy LIDAR Merged with NOAA Chart

Topo LIDAR MHW Shoreline

Hydrographic Soundings (fathoms) Topographic Elevations (feet)

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.