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Short Citation:
OCM Partners, 2022: 2009 USACE NCMP Topobathy Lidar: California, https://www.fisheries.noaa.gov/inport/item/50074.

Item Identification

Title: 2009 USACE NCMP Topobathy Lidar: California
Short Name: usace2009_ca_m4810_metadata
Status: Completed
Creation Date: 2009
Publication Date: 2015-03-13
Abstract:

These files contain classified bathymetric and topographic lidar data classified as unclassified (1), ground (2), low/noise (7), water (9), NOAA OCM bathymetry (11), and overlap (12) in accordance with the American Society for Photogrammetry and Remote Sensing (ASPRS) classification standards. The topographic data were collected with a Leica ALS60 system along the coast of California on the following dates: October 15,16,17,21,22,29,30,31 and November 1,2,3,6,11,14,16,17,18,19,20,29,30. Data coverage generally extends along the coastline from the waterline inland 500 meters (topography). The ALS60 topographic lidar sensor has a pulse repetition rate of 200 kHz at 1064nm. The bathymetric data were collected by the SHOALS-1000T system along the coast of California on the following dates: October 3,10,12,13,25,26,28, November 1,2,6,10,12,15,16,17,18,24,25,26 and December 3,4,5,6. 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 extend 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 processed 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 were referenced to the NAD83 ellipsoid and provided in meters. The National Geodetic Survey's (NGS) GEOID09 model was used to transform the vertical positions from ellipsoid to orthometric heights referenced to the North American Vertical Datum of 1988 (NAVD88). Upon receipt of the data, the NOAA Office for Coastal Management (OCM) converted the topographic las format data and the bathymetric ASCII format data to laz format and orthometric heights to ellipsoid heights using GEOID09. The topographic 3-D position data were sub-divided into a series of LAS files, each covering approximately 5 kilometers of shoreline. The LAS file naming convention is based on the year, project, area name, "Box," and line name. An example file name is "2009_NCMP_CA_001_(system_generated_file_name_for_flightline).las", where (2009) is the year of data collection, (NCMP) is the project under which data were collected, (CA) is the area of data collection, (001) is the "Box" number and (system_generated_file_name_for_flightline) is the line file name. The format of the file is LAS version 1.0. The bathymetric 3-D position data were sub-divided into a series of ASCII file products, with each covering approximately 5 kilometers of shoreline. The data file naming convention was based on the year, project, area name, "Box" number and product type (H - bathymetry). An example file name is "2009_NCMP_CA_001_H.xyz", where <2009> is the project year, <NCMP> is the project under which data were collected, <CA> is the area of data collection, <001> is the "Box" number and <H> is the product type. The ASCII columns were Longitude, Latitude, UTM Zone, Easting, Northing, Elevation (orthometric), Elevation (ellipsoid), Date, and Time.

Upon arrival to NOAA's Office for Coastal Management the data were converted to geographic coordinates and to GRS80 (ellipsoid) in meters.

In addition to these lidar point data, the bare earth Digital Elevation Models (DEM) created from the lidar point data are also available. These data are available for custom download at the link provided in the URL section of this metadata record.

Purpose:

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.

Notes:

10718

Supplemental Information:

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

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/4810/supplemental/usace2009_ca_m4810.kmz

Keywords

Theme Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > LAND SURFACE > LAND USE/LAND COVER
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > BATHYMETRY
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > BATHYMETRY > COASTAL BATHYMETRY
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION
ISO 19115 Topic Category
elevation
ISO 19115 Topic Category
oceans

Spatial Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA
Global Change Master Directory (GCMD) Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > CALIFORNIA
Global Change Master Directory (GCMD) Location Keywords
OCEAN > PACIFIC OCEAN
Global Change Master Directory (GCMD) Location Keywords
VERTICAL LOCATION > LAND SURFACE
Global Change Master Directory (GCMD) Location Keywords
VERTICAL LOCATION > SEA FLOOR

Instrument Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Instrument Keywords
LIDAR > Light Detection and Ranging

Physical Location

Organization: Office for Coastal Management
City: Charleston
State/Province: SC

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: As Needed
Distribution Liability:

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

Support Roles

Data Steward

CC ID: 689314
Date Effective From: 2015-03-13
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Distributor

CC ID: 689316
Date Effective From: 2015-03-13
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Metadata Contact

CC ID: 689317
Date Effective From: 2015-03-13
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Point of Contact

CC ID: 689315
Date Effective From: 2015-03-13
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Extents

Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 1146832
W° Bound: -121.95881
E° Bound: -117.112696
N° Bound: 36.662325
S° Bound: 32.533092

Extent Group 1 / Time Frame 1

CC ID: 1146831
Time Frame Type: Range
Start: 2009-10-03
End: 2009-12-06

Spatial Information

Spatial Representation

Representations Used

Vector: Yes

Reference Systems

Reference System 1

CC ID: 1168721

Coordinate Reference System

CRS Type: Geographic 3D
EPSG Code: EPSG:6319
EPSG Name: NAD83(2011)
See Full Coordinate Reference System Information

Access Information

Security Class: Unclassified
Security Classification System:

N/A

Security Handling Description:

N/A

Data Access Constraints:

None

Data Use Constraints:

These data depict the heights at the time of the survey and are only accurate for that time. Acknowledgment of the Joint Airborne Lidar Bathymetry Technical Center of eXpertise (JALBTCX) would be appreciated in any publications or derived products. The data herein, including but not limited to geographic data, tabular data, analytical data, electronic data structures or files, are provided "as is" without warranty of any kind, either expressed or implied, or statutory, including, but not limited to, the implied warranties or merchantability and fitness for a particular purpose. The entire risk as to the quality and performance of the data is assumed by the user. No guarantee of accuracy is granted, nor is any responsibility for reliance thereon assumed. In no event shall the U.S. Army Corps of Engineers, Mobile District Office, Spatial Data Branch be liable for direct, indirect, incidental, consequential or special damages of any kind, including, but not limited to, loss of anticipated profits or benefits arising out of use of or reliance on the data. The Spatial Data Branch does not accept liability for any damages or misrepresentation caused by inaccuracies in the data or as a result of changes to the data caused by system transfers or other transformations or conversions, nor is there responsibility assumed to maintain the data in any manner or form.

Distribution Information

Distribution 1

CC ID: 742900
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=4810
Distributor: NOAA Office for Coastal Management (NOAA/OCM) (2015-03-13 - Present)
File Name: Customized Download
Description:

Create custom data files by choosing data area, product type, map projection, file format, datum, etc.

File Type: Zip

Distribution 2

CC ID: 742901
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/4810/index.html
Distributor: NOAA Office for Coastal Management (NOAA/OCM) (2015-03-13 - Present)
File Name: Bulk Download
Description:

Simple download of data files.

File Type: Zip

URLs

URL 1

CC ID: 742903
URL: https://coast.noaa.gov/dataviewer
Name: NOAA's Office for Coastal Management (OCM) Data Access Viewer (DAV)
URL Type:
Online Resource
File Resource Format: HTML
Description:

The Data Access Viewer (DAV) allows a user to search for and download elevation, imagery, and land cover data for the coastal U.S. and its territories. The data, hosted by the NOAA Office for Coastal Management, can be customized and requested for free download through a checkout interface. An email provides a link to the customized data, while the original data set is available through a link within the viewer.

URL 2

CC ID: 742904
URL: https://coast.noaa.gov
Name: NOAA's Office for Coastal Management (OCM) website
URL Type:
Online Resource
File Resource Format: HTML
Description:

Information about the NOAA Office for Coastal Management (OCM).

URL 3

CC ID: 742905
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/4810/supplemental/usace2009_ca_m4810.kmz
Name: Browse Graphic
URL Type:
Browse Graphic
File Resource Format: kmz
Description:

This graphic shows the lidar coverage for the 2009 USACE Topobathy Lidar California data set.

URL 4

CC ID: 1168722
URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=9488/details/9488
Name: Custom DEM Download
URL Type:
Online Resource
File Resource Format: Zip
Description:

Link to custom download, from the Data Access Viewer (DAV), the raster Digital Elevation Model (DEM) data that were created from this lidar data set.

Activity Log

Activity Log 1

CC ID: 689346
Activity Date/Time: 2016-05-23
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 689345
Activity Date/Time: 2017-11-14
Description:

Converted from FGDC Content Standards for Digital Geospatial Metadata (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details.

Activity Log 3

CC ID: 718678
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 742902
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Data Quality

Accuracy:

These data are not attributed.

Horizontal Positional Accuracy:

Topographic data - The data positions were obtained using post processed KGPS methods. The horizontal accuracy of the data is better than plus or minus 0.50 m. Bathymetric data - The data positions were obtained using post processed KGPS methods. The horizontal accuracy of the data is better than plus or minus 1.5 m.

Vertical Positional Accuracy:

Topographic data - The data positions were obtained using post processed KGPS methods. The vertical accuracy of the data is better than plus or minus 0.15 m. Bathymetric data - The data positions were obtained using post processed KGPS methods. The vertical accuracy of the data is better than plus or minus 0.15 m.

Completeness Measure:

Cloud Cover: Unknown

Completeness Report:

This data set is complete.

Conceptual Consistency:

Topographic data - Differences between a DEM created from the lidar data representing bare ground and the ground truth data is unbiased and within +/- 15 cm (RMSE) in flat terrain and within +/-30 cm (RMSE) in hilly terrain. Bathymetric data - The data provided were tested against ground truth data. At these locations the lidar data matched within 0.30 meters (RMSE 95% confidence level).

Lineage

Lineage Statement:

The USACE collected, processed, and provided the data to the NOAA Office for Coastal Management (OCM). OCM received the data and processed it to be available for custom download from the Data Access Viewer (DAV) and for bulk download from AWS.

Sources

USACE JALBTCX

CC ID: 1168723
Contact Role Type: Originator
Contact Type: Organization
Contact Name: USACE JALBTCX

Process Steps

Process Step 1

CC ID: 1146826
Description:

Topographic data - These data were collected using the ALS60 lidar system. They are owned by Fugro EarthData and operated through contract. The system collects topographic lidar data at maximum pulse rate of 200 kHz in a wavelength of 1064 nm. A CASI-1500 hyperspectral line scanner is integrated with the system. Aircraft position, velocity and acceleration information are collected by the onboard GPS/IMU system. Raw data were transferred to the office and processed in IPAS software. Aircraft position data are processed using POSPac software and the results are combined with the lidar data to produce 3-D positions for each lidar shot. Upon processing, validation and QA/QC in the software packages GeoCue and TerraScan, anomalous data are flagged as invalid and necessary reflights are called. Fugro's proprietary software converts all valid data from ellipsoid to orthometric heights based on the NGS' GEOID09 model and exports topographic data as a series of LAS files with a single file per flightline per 5km box.

Process Step 2

CC ID: 1146827
Description:

Topographic data - 1. The raw lidar data was processed through a minimum block mean algorithm, and points were classified as either bare earth or non-bare earth. 2. User developed macros that factor mean terrain angle and height from the ground were used to determine bare earth point classification. 3. The next phase of the surfacing process was a 2D edit procedure that ensures the accuracy of the automated feature classification. 4. Editors used a combination of imagery, intensity of the lidar reflection, profiles and tin-editing software to assess points. 5. The lidar data was filtered, as necessary, using a quadric error metric to remove redundant points. This method leaves points where there is a change in the slope of surfaces (road ditches) and eliminates points from evenly sloped terrain (flat field) where the points do not affect the surface. 6. The algorithms for filtering data were utilized within Fugro EarthData's proprietary software and commercial software written by TerraSolid. 7. The flight line overlap points were merged back into filtered data set for delivery product. 8. The point cloud data were delivered tiled in LAS 1.0 format; unclassified (1), ground (2), low/noise (7), water (9), and overlap (12).

Process Step 3

CC ID: 1146828
Description:

Bathymetric data - These data were collected using the SHOALS-1000T system. It is owned by Fugro Pelagos Inc. and operated through contract. The system collects bathymetric lidar data at 1kHz and RGB imagery at 1Hz. A CASI-2 hyperspectral line scanner is integrated with the system as well. Aircraft position, velocity and acceleration information are collected through a combination of Novatel and POS A/V 410 equipment. All raw data streams are transferred to the office for downloading and processing in SHOALS GCS software. Aircraft position data are processed using POSPac software and the results are combined with the lidar data to produce 3-D positions for each lidar shot. Upon inspection and QA/QC in the software package Fledermaus, anomalous data are flagged as invalid. FPI Workbench then converts all valid data from ellipsoid to orthometric heights based on the NGS' GEOID09 model and exports data as a series of bathymetry (H) ASCII files. The bathymetry files contain all of the returns from the bathymetric sensor which include returns both above and below the water.

Process Step 4

CC ID: 1146829
Description:

The topographic and bathymetric data were received by the Office for Coastal Management (OCM). The topographic data were in las format and the bathymetric data were in ASCII format. The topographic and bathymetric data were in orthometric (NAVD88) heights and in geographic coordinates. The following steps document the processing of the data for Digital Coast storage and provisioning purposes: 1. The topographic data were converted from orthometric heights to ellipsoid heights using GEOID09. 2. The bathymetric data were converted from orthometric heights to ellipsoid heights using GEOID09 and a classification of 11 (OCM bathymetry) was assigned to the points. 3. All points were converted to laz format.

Process Date/Time: 2015-02-19 00:00:00
Process Contact: Office for Coastal Management (OCM)

Related Items

Item Type Relationship Type Title
Data Set (DS) Cross Reference 2009 USACE NCMP Topobathy Lidar DEM: California

Catalog Details

Catalog Item ID: 50074
GUID: gov.noaa.nmfs.inport:50074
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-15 15:24+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2022-08-09 17:11+0000
Metadata Record Published: 2022-03-16
Owner Org: OCMP
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2022-03-16
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2023-03-16