Dataset Identification:
- This lidar point data set was collected during low tide conditions along an approximately 500-700 meter wide strip of the Southern California coastline within an area extending south from Long Beach to the US/Mexico border. Data were collected in Los Angeles, Orange and San Diego counties from south of the Downtown Long Beach Marina in Long Beach, California to north of Oceanside on March 28, 2007 between 18:54 and 22:01 UTC. Data were collected in Orange and San Diego counties from south of Dana Point to south of the United States-Mexico border near Playas de Tijuana, Baja California, Mexico on March 29, 2007 between 19:08 and 22:00 UTC. Data set features include water, beach, cliffs, and top of cliffs. The all points data set contains the complete point cloud of first and last return elevation and laser intensity measurements recorded during the spring 2007 airborne lidar survey conducted semi-annually by the University of Texas at Austin for the Southern California Beach Processes Study. The data set was generated by the processing of laser range, scan angle, and aircraft attitude data collected using an Optech Inc. Airborne Laser Terrain Mapper (ALTM) 1225 system and geodetic quality Global Positioning System (GPS) airborne and ground-based receivers. Instrument settings and parameters during survey were: Nominal on-ground beam diameter: 25 cm Pulse rate: 25 kHz Maximum number of returns recorded: 2 Minimum separation between detected returns from a single pulse: 4.3 m Laser wavelength: 1064 nm Frequency of GPS sampling: 1 Hz Frequency of IMU sampling: 50 Hz; Scan angle: +/- 20 degrees Nominal height of instrument above ground: 1100 m Nominal single-swath pulse density: 2 m Nominal aggregate pulse density: 0.75 Nature of vertical control: Kinematic and static GPS points
- Title March 2007 Scripps Institute of Oceanography (SIO) Lidar of the Southern California Coastline: Long Beach to the US/Mexico Border
- publication Date 2011-03-01
- organisation Name Southern California Beach Processes Study (SCBPS)/Coastal Data Information Program (CDIP) part of Scripps Institution of Oceanography (SIO) in cooperation with the Center for Space Research and the Bureau of Economic Geology, The University of Texas at Austin
- organisation Name DOC/NOAA/NOS/OCM > Office for Coastal Management, National Ocean Service, National Oceanic and Atmospheric Administration, U.S. Department of Commerce
- Contact information
-
- Telephone
-
- Voice 843-740-1200
- Address
-
- 2234 South Hobson Ave., Charleston, SC, 29405-2413
- electronic Mail Address coastal.info@noaa.gov
- organisation Name Scripps Institute of Oceanography
- organisation Name Center for Space Research, University of Texas at Austin
- organisation Name Bureau of Economic Geology, University of Texas at Austin
- organisation Name DOC/NOAA/NOS/OCM > Office for Coastal Management, National Ocean Service, National Oceanic and Atmospheric Administration, U.S. Department of Commerce
- Contact information
-
- Telephone
-
- Voice 843-740-1200
- Address
-
- 2234 South Hobson Ave., Charleston, SC, 29405-2413
- electronic Mail Address coastal.info@noaa.gov
Theme keywords (theme):
Bathymetry/Topography
Lidar
GPS
GPS Receivers
Beaches
Coastal Landforms/Processes
Landforms
Terrain Elevation
Coastal Elevation
Shorelines
- Title None
Location keywords:
US
California
Los Angeles County
Orange County
San Diego County
Surfside Beach
Huntington City Beach
Newport Beach
Little Corona Del Mar Beach
Balboa Beach
Main Beach
Arch Beach
Victoria Beach
Aliso Beach
Coast Royale Beach
Poche Beach
San Clemente City Beach
Trestles Beach
San Onofre Beach
Harbor Beach
Oceanside City Beach
South Oceanside Beach
Saint Malo Beach
South Carlsbad State Beach
Torrey Pines State Beach
Blacks Beach
Torrey Pines City Beach
La Jolla Shores Beach
Boomer Beach
Childrens Pool Beach
Wipeout Beach
Marine Street Beach
Windansea Beach
Dog Beach
Ocean Beach City Beach
North Beach
Coronado City Beach
Central Beach
Coronado Shores Beach
- Title None
Temporal keywords:
2007
March
low tide
- Title None
Theme keywords (theme):
- Title Activity > Observation
- publication Date 2017-08-24
Theme keywords (theme):
- Title Realm > Geosphere
- publication Date 2017-08-24
Theme keywords (theme):
- Title Material > Environmental Material
- publication Date 2017-08-24
Theme keywords (theme):
- Title Property > Measure
- publication Date 2017-08-24
Theme keywords (theme):
- Title Science Domain > Earth Science
- publication Date 2017-08-24
Theme keywords (theme):
- Title Equipment > Instrument
- publication Date 2017-08-24
Theme keywords (theme):
- Title Equipment > platform
- publication Date 2017-08-24
Theme keywords (theme):
- Title Material > Chemical
- publication Date 2017-08-24
Theme keywords (theme):
- Title Feature > Marine Feature
- publication Date 2017-08-24
Theme keywords (theme):
- Title Realm > Ocean Region
- publication Date 2017-08-24
Theme keywords (theme):
- Title Virtual International Authority File (VIAF) Corporate Names
- publication Date 2017-08-24
Theme keywords (theme):
purpose:
Browse image (thumbnail):
- maintenance or update frequency: asNeeded
- Constraints
-
- Use limitation statement:
- These data depict the elevations at the time of the survey and are only accurate for that time. 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. Any conclusions drawn from analysis of this information are not the responsibility of NOAA or any of its partners. These data are NOT to be used for navigational purposes.
- Legal Constraints
-
- Use Limitation
- While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
Resource extent
-
- westBoundLongitude -118.000243
- eastBoundLongitude -117.115988
- northBoundLatitude 33.659450
- southBoundLatitude 32.516415
Geographic Bounding Box - Temporal Extent
Geographic Extent
2007-03-28
2007-03-29
- The University of Texas at Austin Center for Space Research operated an Optech Inc. Airborne Laser Terrain Mapper (ALTM) 1225 system installed in a single engine Cessna 206 to collect lidar data for the survey. Global Positioning System (GPS) data were collected simultaneously with three geodetic quality Ashtech Z-12 receivers installed in the aircraft and at two temporary base stations operated during the survey. An Inertial Measurement Unit (IMU) used three orthogonal accelerometers and gyroscopes to collect in-flight instrument orientation information. The Cessna 206 aircraft used in the survey is owned and operated by the Texas Department of Transportation. The ALTM 1225 (SN#99d118) lidar instrument has the following specifications: operating altitude = 410-2,000 m AGL; maximum laser pulse rate = 25 kHz; laser scan angle = variable from 0 to +/-20deg from nadir; scanning frequency = variable, 28 Hz at the 20 deg scan angle; and beam divergence: narrow = 0.2 milliradian (half angle, 1/e). The ALTM 1225 records the range and backscatter intensity of the first and last laser reflection using an Avalanche Photo diode constant-fraction discriminator and two Timing Interval Meters (TIM). ALTM elevation points are computed using three sets of data: laser ranges and their associated scan angles, platform position and orientation information, and calibration data and mounting parameters (Wehr and Lohr, 1999). Global Positioning System (GPS) receivers in the aircraft and on the ground provide platform positioning. The GPS receivers record pseudo-range and phase information for post-processing. Platform orientation information comes from an Inertial Measurement Unit (IMU) containing three orthogonal accelerometers and gyroscopes. An aided-Inertial Navigation System (INS) solution for the aircraft's attitude is estimated from the IMU output and the GPS information.
- This dataset was generated for the Scripps Institution of Oceanography by the Center for Space Research, The University of Texas at Austin (CSR), with support provided by the Bureau of Economic Geology, The University of Texas at Austin (BEG), and the Government Flight Services of the Texas Department of Transportation. Acknowledgement of the data originators is requested when using the data set as a source.
- individual Name Roberto Gutierrez
- organisation Name The University of Texas at Austin Center for Space Research
- position Name Research Associate in Geodesy and Geophysics
- Contact information
-
- Telephone
-
- Voice 512.471.5573
- Address
-
- 3925 West Braker LaneSuite 200, Austin, TX, 78759 Country USA
- electronic Mail Address oskar@mail.utexas.edu
- To contact by telephone, call CSR receptionist and request Dr. Gutierrez.
Vector spatial representation information
-
- Geometric Objects
-
- geometric Object Type point
reference system 1
- Reference System Identifier
- Identifier string: urn:ogc:def:crs:EPSG::4269
- authority
-
- Title North American Datum 1983
- alternateTitle NAD83
- revision Date 2007-01-19
- cited responsible party - resourceProvider
-
- organisation Name
- Contact information
-
- Linkage for online resource
-
- name NAD83
- URL: http://www.epsg-registry.org/export.htm?gml=urn:ogc:def:crs:EPSG::4269
- link function information
- Description Link to Geographic Markup Language (GML) description of reference system.
- cited responsible party - publisher
-
- organisation Name European Petroleum Survey Group
- Contact information
-
- Linkage for online resource
-
- name European Petroleum Survey Group Geodetic Parameter Registry
- URL: http://www.epsg-registry.org/
- link function search
- Description Registry that accesses the EPSG Geodetic Parameter Dataset, which is a structured dataset of Coordinate Reference Systems and Coordinate Transformations.
reference system 2
- Reference System Identifier
- Identifier string: Ellipsoid in Meters
- Identifier code space: Local Vertical Reference
Data quality information
Scope of quality information
- source
-
- source description Source Contribution: Raw lidar range files. Range files are the source data collected by the ALTM 1225 sensor. ALTM 1225 range files used for this survey are grouped by date, day of year, pass, pass location, and time of collection (all times UTC) : Spring 2007 March 28, 2007 (Day of Year = 87), HH:MM in UTC =================================================== 08707 Pass A (Carlsbad State Beach to Long Beach) = 19:01-19:39 08707 Pass B (Long Beach to Oceanside) = 19:44-20:17 08707 Pass C (Oceanside to Long Beach) = 20:21-21:01 08707 Pass D (Long Beach to Oceanside) = 21:05-22:01 March 29, 2007 (Day of Year = 88), HH:MM in UTC =================================================== 08807 Pass A (Oceanside Harbor to La Jolla) = 19:15-19:29 08807 Pass B (La Jolla to Oceanside Harbor) = 19:35-19:50 08807 Pass C (Oceanside Harbor to Point Loma) = 19:53-20:15 08807 Pass D (Coronado (North Island NAS) to Playas de Tijuana) = 20:20-20:28 08807 Pass E (Coronado (North Island NAS) to Playas de Tijuana) = 20:31-20:40 08807 Pass F (Coronado (North Island NAS) to Playas de Tijuana) = 20:45-20:53 08807 Pass G (Point Loma to Del Mar (south city limit)) = 20:58-21:10 08807 Pass H (Del Mar to Dana Point) = 21:12-21:44 08807 Pass I (Dana Point to Oceanside Harbor) = 21:47-22:00 Source Type: digital files
- source citation
-
- Title ALTM 1225 range files
- publication Date
- presentationForm tableDigital
- cited responsible party - originator
-
- organisation Name Center for Space Research, the University of Texas at Austin
Resource extent
- Temporal Extent
2007-03-28
2007-03-29
- source description Source Contribution: GPS data. Two Ashtech Z-12 GPS receivers placed at precisely located base stations collected GPS data at 1 second intervals throughout the period of airborne lidar data collection. Data collection commenced prior to take off and ceased subsequent to touch down. A third Ashtech Z-12 GPS receiver collected in-flight GPS data at 1 second intervals. Data were downloaded and stored each day after flight completion. File names included standardized references to location and date. These data were used for ALTM range file processing. See process steps for more detailed information. GPS base station locations by survey day: March 28 (day 087), 2007: SANO, SEAL March 29 (day 088), 2007: SANO, LOMA GPS base station attributes: ID: SANO Name: HPGN-CA SDGPS01, 1990, Description: San Diego County Engineer Department GPS control point at San Onofre NAD83 Coordinates and HAE: 33d 22m 31.08420s N, 117d 33m 54.54673s W, -5.17 ID: SEAL Name: HPGN CA 12 01, Description: California High Precision GPS Network 12 01 (PID:DY9309) NAD83 Coordinates and HAE: 33d 44m 15.03481s N, 118d 05m 17.76708s W, -27.228 ID: LOMA Name: LOMA EAST, Description: NGS Control Point at Loma Point, LOMA EAST, 1994 (PID: AC6092) NAD83 Coordinates and HAE: 32d 40m 13.99579s N, 117d 14m 27.74509s W, 90.892 Source Type: digital files
- source citation
-
- Title Air and Ground GPS L1, L2, pseudorange and phase files from March 28 & 29, 2007 (Days of Year 87 & 88)
- publication Date
- cited responsible party - originator
-
- organisation Name Center for Space Research, the University of Texas at Austin
Resource extent
- Temporal Extent
2007-03-28
2007-03-29
- source description Source Contribution: CORS base station data (StationID: PIN1). GPS base stations solutions were estimated with respect to the GPS Continuously Operating Reference Station (CORS) at Pinyon Flats, CA. DESIGNATION: PINON 1 PGGA CORS ARP CORS_ID: PIN1 NGS PID: AF9708 Source Type: online
- source citation
-
- Title GPS Continuously Operating Reference Station (CORS) at Pinyon Flats, CA
- publication Date
- cited responsible party - originator
-
- organisation Name National Geodetic Survey (NGS)
Resource extent
- Temporal Extent
2007-03-28
2007-03-29
- name Of Measure Horizontal Positional Accuracy Report
- evaluation Method Description Maximum allowable PDOP using a 15 degree elevation mask during data collection was 3.5. The lidar data is estimated to have a horizontal error of less than or equal to 1.0 m. To assess horizontal accuracy, selected portions from each lidar data set (last return only) were used to generate a 1m x 1m digital elevation model (DEM). Data from ground surveys conducted using kinematic GPS techniques and estimated to have a horizontal accuracy of 0.01-0.03 m were superimposed on the lidar DEM and examined for any mismatch between the horizontal position of the ground GPS and the corresponding feature on the lidar DEM. Horizontal agreement between the ground kinematic GPS and the lidar was within the resolution of the 1m x 1m DEM.
- name Of Measure Vertical Positional Accuracy Report
- evaluation Method Description (North) The March 28, 2007, lidar data were compared to kinematic GPS ground survey points collected along an approximately 2 kilometer long stretch of the East Pacific Coast Highway near Laguna Beach. The March 28, 2007, lidar data set was sorted to find data points that fell within 1 m of the GPS points. (South) The March 29, 2007, lidar data were compared to 17 GPS ground survey points collected throughout a parking lot adjacent to the North Torrey Pines Road. The March 29, 2007, lidar data set was sorted to find data points that fell within 2 m of the GPS points. For each survey area (north and south), the mean elevation difference between the selected lidar points and their respective GPS points was used to estimate and remove elevation bias from the lidar. The standard deviation of the elevation differences provided estimates of the lidar precision. The bias was removed so that mean lidar elevations have a vertical accuracy of 0.10 m RMSE.
- evaluation Method Description This data set contains data within a narrow strip (~700 m) of the Southern California coastline. A decimated dataset was visually inspected for completeness. Some beach edges may be missing. Data collected west of the northwestern corner of the Downtown Long Beach Marina (Longitude 118d11m0.63s W) and south of the US-Mexico border at Playas de Tijuana (Latitude 32d32m1.80s N) may be of poor quality and should not be used for analysis.
- measure Description Data points lacking either first or last return values were removed from the data set. An automated method was used to remove obvious outliers. Only data points with vertical values greater than or equal to -20 m and less than or equal to 250 m were retained in the all points data set.
Resource distribution information
Distributor
- organisation Name DOC/NOAA/NOS/OCM > Office for Coastal Management, National Ocean Service, National Oceanic and Atmospheric Administration, U.S. Department of Commerce
- Contact information
-
- Telephone
-
- Voice 843-740-1200
- Address
-
- 2234 South Hobson Ave., Charleston, SC, 29405-2413
- electronic Mail Address coastal.info@noaa.gov
- Ordering Instructions The National Geophysical Data Center serves as the archive for this LIDAR data. NGDC should only be contacted for this data if it cannot be obtained from NOAA Coastal Services Center.
Distributor
- individual Name Mike Sutherland
- organisation Name DOC/NOAA/NESDIS/NCEI > National Centers of Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
- Contact information
-
- Telephone
-
- Voice 303-497-6120
- Fax 303-497-6513
- Address
-
- 325 Broadway E/GC1, Boulder, CO, 80305-3328 Country USA
- electronic Mail Address mike.sutherland@noaa.gov
- Ordering Instructions The National Geophysical Data Center serves as the archive for this LIDAR dataset. NGDC should only be contacted for the data if it cannot be obtained from NOAA Coastal Services Center.
- Format name LAZ
- Format version
- date of next update: 2014-06-07
- maintenance or update frequency: annually
- notes: This metadata was automatically generated from the FGDC Content Standards for Digital Geospatial Metadata standard (version FGDC-STD-001-1998) using the 2013-01-04 version of the FGDC RSE to ISO 19115-2 for LiDAR transform.
- notes: Translated from FGDC 2013-06-07T12:41:27.183-06:00
- individual Name Mike Sutherland
- organisation Name DOC/NOAA/NESDIS/NCEI > National Centers of Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
- Contact information
-
- Telephone
-
- Voice 303-497-6120
- Fax 303-497-6513
- Address
-
- 325 Broadway E/GC1, Boulder, CO, 80305-3328 Country USA
- electronic Mail Address mike.sutherland@noaa.gov