2009 US Army Corps of Engineers (USACE) Joint Airborne Lidar Bathymetry Technical Center of Expertise (JALBTCX) Bathymetric Lidar: Southern California

These files contain bathymetric lidar data collected by the SHOALS-1000T system along the coast of California. Data coverage generally extends along the

coastline from the waterline offshore 1,000 meters or to laser extinction. Exclusively in areas where Fugro Pelagos acquired or planned to acquire

multibeam sonar data by December 31, 2009, data coverage extends from the shoreline either to the 10-m contour, the 20-m contour or the landward extent

of the multibeam data plus an additional 100 m offshore. The SHOALS system has a pulse repetition rate of 1 kHz at 532 nm (green wavelength). Native lidar

data is not generally in a format accessible to most Geographical Information Systems (GIS). Specialized in-house and commercial software packages are

used to process the native lidar data into 3-dimensional positions that can be imported into GIS software for visualization and further analysis. Horizontal

positions, provided in decimal degrees of latitude and longitude, are referenced to the North American Datum of 1983 (NAD83). Vertical positions are

referenced to the NAD83 ellipsoid and provided in meters. The National Geodetic Survey's (NGS) GEOID09 model is used to transform the vertical positions

from ellipsoid to orthometric heights referenced to the North American Vertical Datum of 1988 (NAVD88). Both ellipsoidal and orthometric heights were

provided to NOAA OCM. For data storage and Digital Coast provisioning, NOAA OCM processed the ellipsoidal height data.

Original contact information:

Contact Org: JALBTCX

Title: Data Production Manager

Phone: 228-252-1111

Email: shoals-info@sam.usace.army.mil

These data were collected as a part of the National Coastal Mapping Program (NCMP) to depict the elevations above and below the water line in the

California coastal zone.

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High water turbidity in the survey area hindered the acquisition of bathymetric data in boxes 23,24,25,31,33,34,35 and 36 and resulted in incomplete coverage.

A footprint of this data set may be viewed in Google Earth at:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/1178/supplemental/2009_USACE_JALBTCX_Southern_Calif_Bathy_Lidar.KMZ

Any conclusions drawn from the analysis of this information are not the responsibility of USACE, JALBTCX, the Office for Coastal Management, or its partners.

This data can be obtained on-line at the following URL:

https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=1178

This data set is dynamically generated based on user-specified parameters.

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None

Users should be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer

represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations.

Microsoft Windows Vista Version 6.0 (Build 6001) Service Pack 1; ESRI ArcCatalog 9.3.0.1770

These data are not attributed. | Quantitative Value: N/A | Quantitative Test Explanation: These data are not attributed.

The data positions were obtained using post processed KGPS methods. The horizontal accuracy of the data is better than +/- 1.5 m.; Quantitative Value: 1.5 meters, Test that produced the value: RMSE (m)

The data positions were obtained using post processed KGPS methods. The vertical accuracy of the data is better than +/- 0.15 m.; Quantitative Value: 0.15 meters, Test that produced the value: RMSE (m)

Not Provided

The data provided in this file were tested against ground truth data. At these locations the lidar data matched within 0.30 meters (RMSE 95% confidence level)