Terrestrial lidar data from northern Monterey Bay, California, March 2016

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Joshua B. Logan
Originator: Alexander G. Snyder
Publication_Date: 2017
Title:
Terrestrial lidar data from northern Monterey Bay, California, March 2016
Geospatial_Data_Presentation_Form: comma-delimited text
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/F76H4GCW
Publication_Information:
Publication_Place:
Pacific Coastal and Marine Science Center, Santa Cruz, California
Publisher: U.S. Geological Survey
Online_Linkage: https://doi.org/10.5066/F76H4GCW
Online_Linkage: Larger_Work_Citation:
Citation_Information:
Originator: Andrew W. Stevens
Originator: Joshua B. Logan
Originator: Alexander G. Snyder
Originator: Daniel J. Hoover
Originator: Patrick L. Barnard
Originator: Jonathan A. Warrick
Publication_Date: 2017
Title:
Beach topography and nearshore bathymetry of northern Monterey Bay, California
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/F76H4GCW
Publication_Information:
Publication_Place: Santa Cruz, CA
Publisher: U.S. Geological Survey
Online_Linkage: https://doi.org/10.5066/F76H4GCW
Description:
Abstract:
This part of the data release presents topography data from northern Monterey Bay, California collected in March 2016 with a terrestrial lidar scanner.
Purpose:
Data were obtained to document changes in shoreline position and coastal morphology as they relate to episodic (storms), seasonal, interannual, and longer (for example, El Niño) processes. These data are intended for science researchers, students, policy makers, and the general public. These data can be used with geographic information systems or other software to identify topographic and shallow-water bathymetric features.
Supplemental_Information:
Additional information about the field activities from which these data were derived are available online at:
http://cmgds.marine.usgs.gov/fan_info.php?fan=2016-627-FA
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20160321
Ending_Date: 20160322
Currentness_Reference: ground condition at time data were collected
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Not planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -122.025433
East_Bounding_Coordinate: -121.947639
North_Bounding_Coordinate: 36.972882
South_Bounding_Coordinate: 36.959939
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:59f10ebfe4b0220bbd9c6bdf
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: topography
Theme_Keyword: LIDAR
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: elevation
Theme:
Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: Bathymetry and Elevation
Theme:
Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: coastal sediment budget
Theme:
Theme_Keyword_Thesaurus: Global Change Master Directory (GCMD)
Theme_Keyword: GPS (Global Positioning System)
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: CMGP
Theme_Keyword: Pacific Coastal and Marine Science Center
Theme_Keyword: PCMSC
Place:
Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: Pacific Ocean
Place_Keyword: Monterey Bay
Place_Keyword: Monterey County
Place_Keyword: Santa Cruz County
Access_Constraints: none
Use_Constraints:
USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator(s) of the dataset and in products derived from these data. This information is not intended for navigational purposes.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Joshua B. Logan
Contact_Organization:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Contact_Position: Physical Scientist
Contact_Address:
Address_Type: mailing and physical
Address: 2885 Mission St.
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060
Country: USA
Contact_Voice_Telephone: 831-460-7519
Contact_Electronic_Mail_Address: jlogan@usgs.gov
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report: No formal attribute accuracy tests were conducted.
Logical_Consistency_Report: All data falls within expected ranges.
Completeness_Report:
Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Because the terrestrial lidar scanner rotates around the vertical axis during data collection, horizontal errors in the collected measurements are dependent on the range of each measurement from the sensor. To limit errors caused by long-range returns, only measurements within a range of 700 meters of each scan position were used for the final data product. Typical registration errors in the horizontal angle reported during point cloud registration for these data were found to be below 0.01 degrees, suggesting a maximum horizontal error of about 1.7 cm at a range of 100 meters, up to 12.2 cm at 700 meters. Because the majority of measurements in each point cloud are made near the scanner, it is estimated that average horizontal accuracy of the measurements is less than 7 cm (equivalent to 0.01 degrees of error at range of 400 meters).
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
The vertical accuracy of the terrestrial lidar data was tested by comparing the final cleaned point cloud elevation values to concurrently collected topographic GNSS data. The RMS errors calculated for the vertical differences between these data and the point cloud data were typically found to be less than or equal to about 7 cm.
Lineage:
Process_Step:
Process_Description:
Terrestrial lidar data was collected between March 21 and 22, 2016 using a tripod-mounted Riegl VZ-1000 lidar scanner. For each area surveyed, the scanner was placed at several positions which were selected to provide maximum line-of-sight coverage of the area of interest. Scans were typically conducted in panoramic mode, creating a detailed point cloud of all unobstructed surfaces in a 360 degree view of the scanner. Each individual scan typically contains 20 million or more precise point measurements. At each scan position, co-registered photographic imagery was also collected with a scanner mounted DSLR camera. Scanner registration was performed by placing four or more cylindrical or flat reflective tripod-mounted targets in view of the scanner. The positions of these reflectors were measured using survey grade GNSS, and used in post-processing to register each point cloud into a projected coordinate system.
Process_Date: 20160322
Process_Step:
Process_Description:
Initial data processing of the terrestrial lidar data was conducted using Riegl RiscanPro software. Each scan position and point cloud was registered using the GNSS-measured positions of the tripod-mounted reflectors. The quality of the registration was visually compared against adjacent registered point clouds, and concurrently collected topographic GNSS data. In the unlikely case that initial registration appeared to be inaccurate either due to poor GNSS precision, or poor reflector geometry, a point cloud fitting process called 'Multi-Station Adjustment (MSA)' was used to adjust the spatial registration to match adjacent point clouds. After registration was completed, the point clouds were colorized using RGB pixel values from the co-registered photographic imagery. The point clouds were then hand-edited to remove erroneous data points below the true ground surface caused by reflections on wet sand or water. Additional noise from water, breaking surf, haze, and objects within the point cloud were also removed by hand editing. The point clouds were then exported to comma delimited (.csv) format and converted into LAS format and processed using the LAStools software suite. A batch script was used to: 1) clip the LAS files to the areas of interest, 2) perform a range filter to remove all points further than 700 meters away from the scanner, 3) thin the point cloud to an average spacing of 5 centimeters to reduce point density, and 4) perform a classification algorithm to detect ground points and remove objects and vegetation from the point cloud. At this point a final visual check on the remaining points was performed to verify and correct any misclassification of ground surfaces. To produce the final output files all classified ground points were thinned using the lowest elevation point in 10 centimeter cells, and the resulting points were exported to a comma delimited (.csv) format.
Process_Date: 20171031
Process_Step:
Process_Description:
Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed.
Process_Date: 20201019
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Point
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 2745594
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 10
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -123.0
Latitude_of_Projection_Origin: 0.0
False_Easting: 500000.0
False_Northing: 0.0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:
Abscissa_Resolution: 0.001
Ordinate_Resolution: 0.001
Planar_Distance_Units: Meter
Geodetic_Model:
Horizontal_Datum_Name: NAD83 (2011)
Ellipsoid_Name: GRS_1980
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257222101
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: North American Vertical Datum of 1988
Altitude_Resolution: 0.001
Altitude_Distance_Units: meters
Altitude_Encoding_Method:
Explicit elevation coordinate included with horizontal coordinates
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: Attribute Table
Entity_Type_Definition:
Table containing attribute information associated with the dataset
Entity_Type_Definition_Source: Producer defined
Attribute:
Attribute_Label: x
Attribute_Definition:
East coordinate of data point relative to the North American Datum of 1983 (2011 realization), projected in the Universal Transverse Mercator (UTM), Zone 10 North, meters, coordinate system
Attribute_Definition_Source: Producer Defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 586759.395
Range_Domain_Maximum: 593669.707
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: y
Attribute_Definition:
North coordinate of data point relative to the North American Datum of 1983 (2011 realization), projected in the Universal Transverse Mercator (UTM), Zone 10 North, meters, coordinate system
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 4090872.058
Range_Domain_Maximum: 4092381.402
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: z
Attribute_Definition:
Height in meters of data point with reference to the North American Vertical Datum of 1988.
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.106
Range_Domain_Maximum: 7.833
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: R
Attribute_Definition:
Red pixel value from co-registered digital camera for each data point
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 255
Attribute_Units_of_Measure: unitless digital value
Attribute:
Attribute_Label: G
Attribute_Definition:
Green pixel value from co-registered digital camera for each data point
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 255
Attribute_Units_of_Measure: unitless digital value
Attribute:
Attribute_Label: B
Attribute_Definition:
Blue pixel value from co-registered digital camera for each data point
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 255
Attribute_Units_of_Measure: unitless digital value
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: U.S. Geological Survey - Science Base
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing and physical
Address: Denver Federal Center, Building 810, Mail Stop 302
City: Denver
State_or_Province: CO
Postal_Code: 80225
Country: USA
Contact_Voice_Telephone: 1-888-275-8747
Contact_Electronic_Mail_Address: sciencebase@usgs.gov
Resource_Description:
Topography data are available as a comma-delimited text files (mb16_mar_tls_capitola.csv; mb16_mar_tls_santacruz.csv), along with associated FGDC-compliant metadata.
Distribution_Liability:
Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: comma-delimited text
Format_Version_Number: Matlab 9.2.0.556344
Format_Specification: text
Format_Information_Content: comma-delimited text file
Transfer_Size: 27.8
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions: Data can be downloaded via the Internet
Digital_Form:
Digital_Transfer_Information:
Format_Name: comma-delimited text
Format_Version_Number: Matlab 9.2.0.556344
Format_Specification: text
Format_Information_Content: comma-delimited text file
Transfer_Size: 79.1
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions: Data can be downloaded via the Internet
Fees: None
Metadata_Reference_Information:
Metadata_Date: 20201019
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Joshua B. Logan
Contact_Organization:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Contact_Position: Physical Scientist
Contact_Address:
Address_Type: mailing and physical
Address: 2885 Mission St.
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060
Country: USA
Contact_Voice_Telephone: 831-460-7519
Contact_Electronic_Mail_Address: astevens@usgs.gov
Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

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