Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 20171023
Title:
Lidar-Derived Classified Point-Cloud for Coastal Topography—Chandeleur Islands, Louisiana, 23-25 June 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/F7G73CM4
Publication_Information:
Publication_Place: St. Petersburg, FL
Publisher: U.S. Geological Survey
Online_Linkage: https://doi.org/10.5066/F7G73CM4
Description:
Abstract:
Binary point-cloud data were produced for the Chandeleur Islands, Louisiana, from remotely sensed, geographically referenced elevation measurements collected by Leading Edge Geomatics (LEG) using a Leica Chiroptera II Bathymetric and Topographic Sensor. Dewberry reports that the nominal pulse spacing for this project was 1 point every 0.7 meters. Dewberry used proprietary procedures to classify the LAS according to project specifications: 0-Never Classified, 1-Unclassified, 2-Ground (includes model key point bit for points identified as Model Key Point), 7-Low Noise, 17-Bridges, 18-High Noise, 40-Bathymetric point or submerged topography (includes model key point bit for points identified as Model Key Point), 41-Water Surface, and 42-Derived water surface.
Lidar_Information:
Lidar_Collection_Information:
Lidar_Specification: USGS-NGP Lidar Base Specification V1.2
Lidar_Sensor: Leica Chiroptera II
Lidar_Maximum_Returns: 7
Lidar_Nominal_Pulse_Spacing: 0.87
Lidar_Nominal_Pulse_Density: 1.34
Lidar_Aggregate_Nominal_Pulse_Spacing: 0.35
Lidar_Aggregate_Nominal_Pulse_Density: 8.16
Lidar_Flight_Height: 400
Lidar_Flight_Speed: 120
Lidar_Scan_Angle: 40
Lidar_Scan_Frequency: 39.3/78.6
Lidar_Pulse_Rate: 35/140
Lidar_Pulse_Duration: 0.5/5
Lidar_Pulse_Width: Unknown
Lidar_Central_Wavelength: 1030 and 515/1064
Lidar_Multiple_Pulses_In_Air: 0
Lidar_Beam_Divergence: 4.5/0.5
Lidar_Swath_Width: 291
Lidar_Swath_Overlap: 50
Lidar_Geoid: National Geodetic Survey (NGS) Geoid12B
Lidar_Accuracy_Information:
Lidar_Calculated_Horizontal_Accuracy: 0.196
Lidar_Raw_Nonvegetated_Vertical_Accuracy: 0.102
Lidar_Raw_Nonvegetated_Vertical_Accuracy_Checkpoints: 24
Lidar_Classified_Nonvegetated_Vertical_Accuracy: 0.176
Lidar_Classified_Nonvegetated_Vertical_Accuracy_Checkpoints: 26
Lidar_Classified_Vegetated_Vertical_Accuracy: 0.204
Lidar_Classified_Vegetated_Vertical_Accuracy_Checkpoints: 6
Lidar_LAS_Information:
Lidar_LAS_Version: 1.4
Lidar_LAS_Point_Record_Format: 6
Lidar_LAS_Witheld_Point_Identifier:
Withheld points were identified in these files using the standard LAS Withheld bit
Lidar_LAS_Overage_Point_Identifier:
Swath overage points were identified in these files using the standard LAS overlap bit
Lidar_LAS_Radiometric_Resolution: 16
Lidar_LAS_Classification:
Lidar_LAS_Class_Code: 1
Lidar_LAS_Class_Description: Processed, but unclassified
Lidar_LAS_Classification:
Lidar_LAS_Class_Code: 2
Lidar_LAS_Class_Description:
Bare earth, ground(includes model key point bit for points identified as Model Key Point)
Lidar_LAS_Classification:
Lidar_LAS_Class_Code: 7
Lidar_LAS_Class_Description: Low noise
Lidar_LAS_Classification:
Lidar_LAS_Class_Code: 17
Lidar_LAS_Class_Description: Bridge decks
Lidar_LAS_Classification:
Lidar_LAS_Class_Code: 18
Lidar_LAS_Class_Description: High noise
Lidar_LAS_Classification:
Lidar_LAS_Class_Code: 40
Lidar_LAS_Class_Description:
Bathymetric point (includes model key point bit for points identified as Model Key Point)
Lidar_LAS_Classification:
Lidar_LAS_Class_Code: 41
Lidar_LAS_Class_Description: Water surface
Lidar_LAS_Classification:
Lidar_LAS_Class_Code: 42
Lidar_LAS_Class_Description: Derived Water surface
Purpose:
The purpose of this project was to produce a highly detailed and accurate digital elevation map for the Chandeleur Islands, Louisiana 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), 16CNT01. Additional survey and data details are available at
https://cmgds.marine.usgs.gov/fan_info.php?fan=16CNT01. USGS Contract: G16PC00020 Task Order Number: G16D00701
Supplemental_Information:
Processed data products are used by the U.S. Geological Survey Coastal and Marine Geology Program (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: 20160623
Ending_Date: 20160625
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -88.92587926
East_Bounding_Coordinate: -88.79260120
North_Bounding_Coordinate: 30.07979991
South_Bounding_Coordinate: 29.72764831
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:531efa39-bf6b-4d2c-b791-210a130bbdb9
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: elevation
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: geomorphology
Theme_Keyword: remote sensing
Theme_Keyword: topography
Theme_Keyword: lidar
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: submerged topography
Theme_Keyword: Leica Chiroptera II
Theme_Keyword: laser altimetry
Theme_Keyword: Piper Navajo
Theme_Keyword: shoreline
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: Chandeleur Islands
Place_Keyword: Louisiana
Place_Keyword: Gulf of Mexico
Place_Keyword: United States
Stratum:
Stratum_Keyword_Thesaurus: None
Stratum_Keyword: Bare Earth
Stratum_Keyword: Submerged
Temporal:
Temporal_Keyword_Thesaurus: None
Temporal_Keyword: 2016
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
Hours_of_Service: M-F, 8:00-4:00 ET
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