50074
2009 USACE NCMP Topobathy Lidar: California
usace2009_ca_m4810_metadata
Data Set
Published / External
49401
Lidar - partner (no harvest)
Project
Completed
2009
2015-03-13
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.
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.
10718
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
Theme
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > LAND SURFACE > LAND USE/LAND COVER
Theme
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION
Theme
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > BATHYMETRY
Theme
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > BATHYMETRY > COASTAL BATHYMETRY
Theme
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION
Theme
ISO 19115 Topic Category
elevation
Theme
ISO 19115 Topic Category
oceans
Spatial
Global Change Master Directory (GCMD) Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA
Spatial
Global Change Master Directory (GCMD) Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > CALIFORNIA
Spatial
Global Change Master Directory (GCMD) Location Keywords
OCEAN > PACIFIC OCEAN
Spatial
Global Change Master Directory (GCMD) Location Keywords
VERTICAL LOCATION > LAND SURFACE
Spatial
Global Change Master Directory (GCMD) Location Keywords
VERTICAL LOCATION > SEA FLOOR
Instrument
Global Change Master Directory (GCMD) Instrument Keywords
LIDAR > Light Detection and Ranging
Office for Coastal Management
Charleston
SC
Data Set
As Needed
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.
Data Steward
2015-03-13
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Distributor
2015-03-13
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Metadata Contact
2015-03-13
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Point of Contact
2015-03-13
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Ground Condition
-121.95881
-117.112696
36.662325
32.533092
Range
2009-10-03
2009-12-06
Yes
Geographic 3D
EPSG:6319
NAD83(2011)
NAD83 (National Spatial Reference System 2011)
GRS 1980
6378137
298.257222101
1
Geodetic Latitude
Lat
degree
north
2
Geodetic Longitude
Lon
degree
east
3
Elipsoidal height
h
metre
up
Unclassified
N/A
N/A
None
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.
https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=4810
2015-03-13
Organization
NOAA Office for Coastal Management
Customized Download
Create custom data files by choosing data area, product type, map projection, file format, datum, etc.
Zip
Zip
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/4810/index.html
2015-03-13
Organization
NOAA Office for Coastal Management
Bulk Download
Simple download of data files.
Zip
Zip
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/4810/supplemental/usace2009_ca_m4810.kmz
Browse Graphic
Browse Graphic
kmz
This graphic shows the lidar coverage for the 2009 USACE Topobathy Lidar California data set.
https://coast.noaa.gov
NOAA's Office for Coastal Management (OCM) website
Online Resource
HTML
Information about the NOAA Office for Coastal Management (OCM).
https://coast.noaa.gov/dataviewer
NOAA's Office for Coastal Management (OCM) Data Access Viewer (DAV)
Online Resource
HTML
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.
https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=9488/details/9488
Custom DEM Download
Online Resource
Zip
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.
2016-05-23
Date that the source FGDC record was last modified.
2017-11-14
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.
2018-02-08
Partial upload of Positional Accuracy fields only.
2018-03-13
Partial upload to move data access links to Distribution Info.
These data are not attributed.
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.
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.
Cloud Cover: Unknown
This data set is complete.
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).
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.
USACE JALBTCX
Organization
USACE JALBTCX
Originator
1
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.
2
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).
3
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.
4
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.
2015-02-19T00:00:00
Organization
Office for Coastal Management
OCM
2234 South Hobson Avenue
Charleston
SC
29405-2413
https://www.coast.noaa.gov/
5
The non-hydro data and hydro data higher then -33 meters ellipsoid height were classified using programs in the LAStools package. Steps included:
1) conversion to UTM zone 10
1b) reclassification of green laser points above ground to unclassified
2) noise classification with a step of 8
3) ground classification with lasground_new
4) height determination with lasheight
5) building and vegetation classification with lasclassify using a step of 4
6) conversion from UTM zone 10 to geographic
This was an automated process and manual editing of anomolies was not done. We do know that large buildings are sometimes missed in the building classification.
2023-04-21T00:00:00
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
67050
Data Set
2009 USACE NCMP Topobathy Lidar DEM: California
Cross Reference
gov.noaa.nmfs.inport:50074
Anne Ball
2017-11-15T15:24:07
SysAdmin InPortAdmin
2023-08-15T17:09:52
2022-03-16
OCM Partners
OCMP
1002
Public
No
2022-03-16
1 Year
2023-03-16