ASIS2016_HRHM_SM_z18_n88g12B_classified_metadata: Lidar-Derived Classified Point-Cloud for Coastal Topography—Assateague Island, Maryland and Virginia, Post-Hurricane Hermine, 10-12 September 2016

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Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: U.S. Geological Survey
Publication_Date: 20170324
Title:

ASIS2016_HRHM_SM_z18_n88g12B_classified_metadata: Lidar-Derived Classified Point-Cloud for Coastal Topography—Assateague Island, Maryland and Virginia, Post-Hurricane Hermine, 10-12 September 2016

Edition: first
Geospatial_Data_Presentation_Form: binary point cloud
Series_Information:

Series_Name: U.S. Geological Survey Data Release
Issue_Identification: doi:10.5066/F7NP22NH

Publication_Information:

Publication_Place: St. Petersburg, FL
Publisher: U.S. Geological Survey

Online_Linkage: https://doi.org/10.5066/F7NP22NH

Description:

Abstract:

Binary point-cloud data were produced for Assateague Island, Maryland and Virginia, post-Hurricane Hermine, from remotely sensed, geographically referenced elevation measurements collected by Quantum Spatial using a Riegl VQ-880-G (532-nm wavelength circular scan and 1064-nm wavelength linear scan) lidar sensor.

Purpose:

The purpose of this project was to produce a highly detailed and accurate digital elevation map for Assateague Island, Maryland and Virginia for use as a management tool and to make these data available to natural-resource managers and research scientists. To ensure that SPCMSC data management protocols were followed, this survey was assigned a USGS field activity number (FAN), 16CNT03. Additional survey and data details are available at http://cmgds.marine.usgs.gov/fan_info.php?fan=16CNT03. USGS Contract: G16PC00016 Task Order Number: G16D01063

Supplemental_Information:

Processed data products are used by the U.S. Geological Survey (USGS) CMGP's National Assessment of Coastal Change Hazards project to quantify the vulnerability of shorelines to coastal change hazards such as severe storms, sea-level rise, and shoreline erosion and retreat.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20160910
Ending_Date: 20160912

Currentness_Reference: ground condition

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -75.4234
East_Bounding_Coordinate: -75.0796
North_Bounding_Coordinate: 38.3351
South_Bounding_Coordinate: 37.8387

Keywords:

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: elevation

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:86f6d7f7-0ab5-4779-b611-d1d293d1b775

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: Digital Elevation Model
Theme_Keyword: DEM
Theme_Keyword: extratropical cyclone
Theme_Keyword: laser altimetry
Theme_Keyword: lidar
Theme_Keyword: Cessna Caravan
Theme_Keyword: remote sensing
Theme_Keyword: shoreline
Theme_Keyword: submerged topography
Theme_Keyword: topography

Theme:

Theme_Keyword_Thesaurus: Global Change Master Science Directory
Theme_Keyword: LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION
Theme_Keyword: OCEAN > COASTAL PROCESSES > BARRIER ISLANDS
Theme_Keyword: OCEAN > COASTAL PROCESSES > BEACHES
Theme_Keyword: OCEAN > COASTAL PROCESSES > SHORELINE DISPLACEMENT
Theme_Keyword:

DOI/USGS/CMG > COASTAL AND MARINE GEOLOGY, U.S. GEOLOGICAL SURVEY, U.S. DEPARTMENT OF INTERIOR

Theme:

Theme_Keyword_Thesaurus: GCMD Instrument
Theme_Keyword: lidar > LIGHT DETECTION AND RANGING

Place:

Place_Keyword_Thesaurus: Geographic Names Information System
Place_Keyword: Assateague Island
Place_Keyword: Maryland
Place_Keyword: Virginia
Place_Keyword: Delmarva Peninsula
Place_Keyword: United States

Stratum:

Stratum_Keyword_Thesaurus: None
Stratum_Keyword: Bare Earth
Stratum_Keyword: Submerged

Temporal:

Temporal_Keyword_Thesaurus: None
Temporal_Keyword: 2016
Temporal_Keyword: Post-Hurricane Hermine

Access_Constraints: None
Use_Constraints:

Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. The U.S. Geological Survey requests to be acknowledged as originator of these data in future products or derivative research.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Xan Fredericks
Contact_Organization:

U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, St. Petersburg, FL

Contact_Position: Cartographer/Lidar Coordinator
Contact_Address:

Address_Type: mailing and physical address
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA

Contact_Voice_Telephone: 727 502-8086
Contact_Facsimile_Telephone: 727 502-8182
Contact_Electronic_Mail_Address: afredericks@usgs.gov

Data_Set_Credit:

Acknowledgment of the U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, as a data source would be appreciated in products developed from these data, and such acknowledgment as is standard for citation and legal practices for data source is expected. Sharing of new data layers developed directly from these data would also be appreciated by the U.S. Geological Survey staff. Users should be aware that comparisons with other datasets for the same area from other periods may be inaccurate because of inconsistencies resulting from changes in photointerpretation, mapping conventions, and digital processes over time. These data are not legal documents and are not to be used as such.

Security_Information:

Security_Classification_System: Unclassified
Security_Classification: Unclassified
Security_Handling_Description: None

Native_Data_Set_Environment:

Microsoft Windows 7 Enterprise Service Pack 1; Esri ArcCatalog 10.2.2.3552

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Logical_Consistency_Report:

Quantum Spatial reports that data cover the entire area specified for this project, approximately 52,196.2 acres.

Completeness_Report:

Quantum Spatial reports that these LAS files include all data points collected. No points have been removed or excluded. Shaded relief images have been visually inspected for data errors such as pits, border artifacts, and shifting. Lidar flight lines have been examined to ensure consistent elevation values across overlapping flight lines. The raw point cloud is of good quality and data passes Vertical Accuracy specifications.

Positional_Accuracy:

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Quantum Spatial reports that the contract specifications required that raw Non-vegetated Vertical Accuracy (NVA) be computed from the both the raw lidar point cloud swath files and the derived DEMs. Additionally, Vegetated Vertical Accuracy (VVA) was also to be computed from the derived DEMS. The NVA was tested with 13 independent check points provided to QSI by USGS located in open terrain, and distributed throughout the project as feasible. These check points were not used in the calibration or post processing of the lidar point cloud data. The VVA was tested with 12 independent check points, also provided to QSI by USGS, located in vegetated terrain and also witheld from the calibration and post processing of the lidar point cloud data. VVA points were also distributed throughout the project area as feasible. Specifications for this project require that the NVA be 19.6 meters or better AccuracyZ at 95% confidence level and that the VVA be 29.4 cm or better AccuracyZ at the 95th percentile. NVA Root Mean Square Error (RMSE) was calculated using the 13 independent check points provided by the USGS and resulted in a value of 0.072m.

Lineage:

Process_Step:

Process_Description:

Quantum Spatial reports the following steps for Lidar Pre-Processing: 1. Review flight lines and data to ensure complete coverage of the study area and positional accuracy of the laser points. 2. Resolve kinematic corrections for aircraft position data using kinematic aircraft GPS and static ground GPS data. 3. Develop a smoothed best estimate of trajectory (SBET) file that blends post-processed aircraft position with sensor head position and attitude recorded throughout the survey. 4. Calculate laser point position by associating SBET position to each laser point return time, scan angle, intensity, etc. Create raw laser point cloud data for the entire survey in *.las format. Convert data to orthometric elevations by applying a geoid correction. 5. Import raw laser points into manageable blocks to perform manual relative accuracy calibration and filter erroneous points. Apply the refraction correction necessary for bathymetric data. Classify ground/bathymetric points for individual flight lines. 6. Using ground classified points per each flight line, test the relative accuracy. Perform automated line-to-line calibrations for system attitude parameters (pitch, roll, heading), mirror flex (scale) and GPS/IMU drift. Calculate calibrations on ground classified points from paired flight lines and apply results to all points in a flight line. Use every flight line for relative accuracy calibration. 7. Adjust the point cloud by comparing ground classified points to supplemental ground control points.

Source_Used_Citation_Abbreviation: Base_Station_Control, SBETs, SGCPs, RAW_lidar
Process_Date: 20161130
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Quantum Spatial

Contact_Address:

Address_Type: mailing and physical
Address: 517 SW 2nd Street, Suite 400
City: Corvallis
State_or_Province: OR
Postal_Code: 97333
Country: USA

Contact_Voice_Telephone: 541-752-1204
Contact_Facsimile_Telephone: 541-752-3770

Process_Step:

Process_Description:

Quantum Spatial reports the following steps for Lidar Post-Processing: 1. Classify data to ground and other client designated classifications using proprietary classification algorithms. 2. Manually QC data classification 3. After completion of classification and final QC approval, calculate density information and verify final accuracy calculations for the project using ground control quality check points.

Source_Used_Citation_Abbreviation: Base_Station_Control, SBETs, QCPs, RAW_lidar
Process_Date: 20161130
Source_Produced_Citation_Abbreviation: Classified_lidar
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Quantum Spatial

Contact_Address:

Address_Type: mailing and physical
Address: 517 SW 2nd Street, Suite 400
City: Corvallis
State_or_Province: OR
Postal_Code: 97333
Country: USA

Contact_Voice_Telephone: 541-752-1204
Contact_Facsimile_Telephone: 541-752-3770

Process_Step:

Process_Description:

Added keywords section with USGS persistent identifier as theme keyword.

Process_Date: 20201013
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: Vector
Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Point

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:

UTM_Zone_Number: 18
Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -75.000000
Latitude_of_Projection_Origin: 0
False_Easting: 500000.000000
False_Northing: 0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:

Abscissa_Resolution: 0.01
Ordinate_Resolution: 0.01

Planar_Distance_Units: meters

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983 (2011)
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.25722210100002

Vertical_Coordinate_System_Definition:

Altitude_System_Definition:

Altitude_Datum_Name: North American Vertical Datum of 1988 (GEOID12B)
Altitude_Resolution: 0.01
Altitude_Distance_Units: meters
Altitude_Encoding_Method:

Explicit elevation coordinate included with horizontal coordinates

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: Xan Fredericks

Contact_Position: Cartographer/Lidar Coordinator, U.S. Geological Survey
Contact_Address:

Address_Type: mailing and physical address
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA

Contact_Voice_Telephone: 727 502-8086

Resource_Description: ASIS2016_HRHM_SM_z18_n88g12B_classified.laz
Distribution_Liability:

Although these data have been processed successfully on a computer system at the 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. The USGS shall not be held liable for improper or incorrect use of the data described and/or contained herein. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: Compressed LAS (LAZ)
Format_Specification: Compressed LAS (LAZ)
Format_Version_Number: 1.4

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://coastal.er.usgs.gov/data-release/doi-F7NP22NH/data/ASIS2016_HRHM_SM_z18_n88g12B_classified.zip

Fees: None

Metadata_Reference_Information:

Metadata_Date: 20230927
Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Xan Fredericks
Contact_Organization:

U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, St. Petersburg, FL

Contact_Position: Cartographer/Lidar Coordinator
Contact_Address:

Address_Type: mailing and physical address
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA

Contact_Voice_Telephone: 727 502-8086
Contact_Electronic_Mail_Address: afredericks@usgs.gov

Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time

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