2009 US Army Corps of Engineers (USACE) Joint Airborne Lidar Bathymetry Technical Center for Expertise (JALBTCX) Topographic Lidar: Post Hurricane Gustav and Post Hurricane Ike

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator:

Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC)

Originator:

JALBTCX (Joint Airborne Lidar Bathymetry Technical Center of Expertise)

Publication_Date: 201109

Title:

2009 US Army Corps of Engineers (USACE) Joint Airborne Lidar Bathymetry Technical Center for Expertise (JALBTCX) Topographic Lidar: Post Hurricane Gustav and Post Hurricane Ike

Publication_Information:

Publication_Place: Charleston, SC

Publisher: NOAA's Ocean Service, Coastal Services Center (CSC)

Online_Linkage:

http://www.csc.noaa.gov/dataviewer/index.html?action=advsearch&qType=in&qFld=ID&qVal=1061

Online_Linkage: http://www.csc.noaa.gov/lidar

Online_Linkage: http://www.csc.noaa.gov/

Online_Linkage: http://www.csc.noaa.gov/htdata/lidar1_z/geoid12a/data/1061

Description:

Abstract:

The Light Detection and Ranging (LiDAR) LAS dataset is a topographic survey conducted for the Post Hurricane Gustav and Post Hurricane Ike Aerial Survey 2009 projects. Hurricane Gustav made US landfall at Cocodrie, LA on September 1, 2008. Hurricane Ike made US landfall near Galveston, TX on September 13, 2008. This data was produced for the US Army Corps of Engineers (USACE) Joint Airborne Lidar Bathymetry Technical Center of Expertise (JALBTCX). The LiDAR point cloud was flown at a density sufficient to support a maximum final post spacing of 1.5 points per meter. The data are classified according to ASPRS LAS specifications as: 1 (Unclassified), 2 (Ground), 3 (Low Vegetation) 4 (Medium Vegetation), 5 (High Vegetation), 6 (Building), 7 (Low Point (Noise)), and 9 (Water). 3001 International Inc. acquired the 290 flightlines between February 3, 2009 and April 23, 2009. The Post Hurricane Gustav and Post Hurricane Ike Aerial Surveys 2009 were collected under the guidance of a Professional Mapper/Surveyor.

Purpose:

The Post Hurricane Gustav and Post Hurricane Ike Aerial Survey 2009 projects will support the US Army Corps of Engineers (USACE) Joint Airborne Lidar Bathymetry Technical Center of Expertise (JALBTCX) collection of data representing the post-hurricane condition of the beaches, barrier islands, and lakeshores along the coasts of Alabama, Louisiana, Mississippi, and Texas following Hurricanes Gustav and Ike.

Supplemental_Information:

A footprint of this data set may be viewed in Google Earth at: ftp://csc.noaa.gov/pub/DigitalCoast/lidar1_z/geoid12a/data/1061/supplemental/2009_USACE_Post_Hurricanes_Gustav_and_Ike_Topo_Lidar.kmz

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20090203

Ending_Date: 20090423

Currentness_Reference: ground condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -96.377283

East_Bounding_Coordinate: -88.021722

North_Bounding_Coordinate: 30.524092

South_Bounding_Coordinate: 28.396541

Keywords:

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

Theme_Keyword: elevation

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: Bathymetry/Topography

Theme_Keyword: Elevation

Theme_Keyword: Height

Theme_Keyword: LAS V.1.1 LiDAR

Theme_Keyword: Topography

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: United States

Place_Keyword: Alabama

Place_Keyword: Louisiana

Place_Keyword: Mississippi

Place_Keyword: Texas

Temporal:

Temporal_Keyword_Thesaurus: None

Temporal_Keyword: September

Temporal_Keyword: 2008

Access_Constraints: None

Use_Constraints:

Users should be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: 3001 International Inc.

Contact_Position: LiDAR Department

Contact_Address:

Address_Type: mailing and physical

Address: 501 Robert Blvd

Address: 2nd Floor

City: Slidell

State_or_Province: Louisiana

Postal_Code: 70458

Country: USA

Contact_Voice_Telephone: (985) 661 - 3001

Contact_Facsimile_Telephone: (985) 649 - 5082

Contact_Electronic_Mail_Address: lidar@3001inc.com

Hours_of_Service: 8:00 - 5:00 CDT

Data_Set_Credit:

Acknowledgement of US Army Corps of Engineers (USACE) Joint Airborne Lidar Bathymetry Technical Center of Expertise (JALBTCX) would be appreciated in products derived from these data.

Security_Information:

Security_Classification_System: Unclassified

Security_Classification: Unclassified

Security_Handling_Description: Unclassified

Native_Data_Set_Environment:

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.6.1500

Cross_Reference:

Citation_Information:

Originator: 3001 International Inc.

Publication_Date: Unknown

Publication_Time: Unknown

Title:

Post Hurricane Gustav and Post Hurricane Ike Aerial Surveys 2009 LAS Datasets

Geospatial_Data_Presentation_Form: raster digital data

Publication_Information:

Publication_Place: Slidell, LA

Publisher: 3001 International Inc.

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

The Post Hurricane Gustav and Post Hurricane Ike Aerial Survey 2009 projects were collected under the guidance of a Professional Mapper/Surveyor. The data were collected at a density sufficient to support a maximum final post spacing of 1.5 points per meter.

Logical_Consistency_Report:

The Light Detection and Ranging (LiDAR) LAS dataset is a topographic survey conducted for the Post Hurricane Gustav and Post Hurricane Ike Aerial Survey Projects. These data were produced for the US Army Corps of Engineers (USACE) Joint Airborne Lidar Bathymetry Technical Center of Expertise (JALBTCX).

Completeness_Report:

The LAS files were flown at a density sufficient to support a maximum final post spacing of final post spacing of 1.5 points per meter.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

All ground control processing and adjustment is performed using published coordinate horizontal and vertical datums (e.g. NGS CORS). For deliverables, Corpscon for Windows Version 5.11.08 (geoid 03) was used for horizontal and vertical datum conversion as well as for coordinate system conversion purposes (e.g. UTM to State Plane).

Quantitative_Horizontal_Positional_Accuracy_Assessment:

Horizontal_Positional_Accuracy_Value: 1

Horizontal_Positional_Accuracy_Explanation: See entity and attribute information

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

The accuracy assessment was performed using a standard method to compute the root mean square error (RMSE) based on a comparison of ground control points (GCP) and filtered LiDAR data points. Filtered LiDAR data has had vegetation and cultural features removed and by analysis represents bare-earth elevations. The RMSE figure was used to compute the vertical National Standard for Spatial Data Accuracy (NSSDA). Ground control was established by 3001, Inc. A spatial proximity analysis was used to select edited LiDAR data points contiguous to the relevant GCPs. A search radius decision rule is applied with consideration of terrain complexity, cumulative error and adequate sample size. Cumulative error results from the errors inherent in the various sources of horizontal measurement. These sources include the airborne GPS, GCPs and the uncertainty of the accuracy of the LiDAR data points. This accuracy is achieved prior to the sub-sampling that occurs through integration with the inertial measurement unit (IMU) positions that are recorded. It is unclear at this time whether the initial accuracy is maintained. The horizontal accuracy of the GCPs is estimated to be in the range of approximately 1 to 1.6 inches. Finally, sample size was considered. The specification for the National Standard for Spatial Data Accuracy is a minimum of 20 points to conduct a statistically significant accuracy evaluation (Minnesota Planning, 1999, Positional Accuracy Handbook, Minnesota Planning Land Management Information Center, St. Paul, Minnesota., p.3). Most statistical texts indicate that a minimum of 30 sample points provide a reasonable Approximation of a normal distribution. The intent of the NSSDA is to reflect the geographic area of interest and the distribution of error in the data set (Federal Geographic Data Committee, 1998, Geospatial National Standard for Spatial Data Accuracy, Federal Geographic Data Committee Secretariat, Reston, Virginia, p.3-4). Additional steps were taken to ensure the vertical accuracy of the LiDAR data including: Step 1: Precision Bore sighting (Check Edge-matching); Step 2: Compare the LiDAR data to the Field Survey (Field survey is to FEMA specifications and more stringent internal specifications); Step 3: Automated Filtering; Step 4: Manual Editing (Quality Control) Step

Quantitative_Vertical_Positional_Accuracy_Assessment:

Vertical_Positional_Accuracy_Value: 0.15

Vertical_Positional_Accuracy_Explanation: See entity and attribute information

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: 3001 International Inc.

Publication_Date: Unknown

Publication_Time: Unknown

Title:

Post Hurricane Gustav and Post Hurricane Ike Aerial Surveys LAS Datasets

Geospatial_Data_Presentation_Form: raster digital data

Publication_Information:

Publication_Place: Slidell, LA

Publisher: 3001 International Inc.

Source_Scale_Denominator: 24000

Type_of_Source_Media: digital tape media

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20090203

Beginning_Time: Unknown

Ending_Date: 20090423

Ending_Time: Unknown

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: scale map

Source_Contribution:

The Post Hurricane Gustav and Post Hurricane Ike Aerial Surveys 2009 were acquired for the US Army Corps of Engineers (USACE) Joint Airborne Lidar Bathymetry Technical Center of Expertise (JALBTCX) and processed by 3001 International Inc.

Process_Step:

Process_Description:

The Airborne Global Position System (ABGPS), inertial measurement unit (IMU), and raw scans are collected during the LiDAR aerial survey. The ABGPS monitors the xyz position of the sensor and the IMU monitors the orientation of the aircraft. During the aerial survey laser pulses reflected from features on the surface and are detected by the receiver optics and collected by the data logger. GPS locations are based on data collected by receivers on the aircraft and base stations on the ground. The ground base stations are placed no more than 20 km radius from the flight survey area. The instruments used to collect this data were the Optech ALTM Gemini and the Airborne Global Positioning System.

Process_Date: 20090423

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: 3001 International Inc.

Contact_Position: LiDAR Department

Contact_Address:

Address_Type: mailing and physical

Address: 501 Robert Blvd

Address: 2nd Floor

City: Slidell

State_or_Province: Louisiana

Postal_Code: 70458

Country: USA

Contact_Voice_Telephone: (985) 661 - 3001

Contact_Facsimile_Telephone: (985) 649 - 5082

Contact_Electronic_Mail_Address: lidar@3001inc.com

Hours_of_Service: 8:00 - 5:00 CDT

Process_Step:

Process_Description:

The ABGPS, IMU, and raw scans are integrated using proprietary software developed by Optech and delivered with the Optech ALTM Gemini System. The resultant file is in a LAS binary file format. The LAS file version 1.1 format can be easily transferred from one file format to another. It is a binary file format that maintains information specific to the LiDAR data (return#, intensity value, xyz, etc.). The resultant points are referenced to the Geographic NAD83 horizontal datum and NAVD88 vertical datum.

Process_Date: 20090527

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: 3001 International Inc.

Contact_Position: LiDAR Department

Contact_Address:

Address_Type: mailing and physical

Address: 501 Robert Blvd

Address: 2nd Floor

City: Slidell

State_or_Province: Louisiana

Postal_Code: 70458

Country: USA

Contact_Voice_Telephone: (985) 661 - 3001

Contact_Facsimile_Telephone: (985) 649 - 5082

Contact_Electronic_Mail_Address: lidar@3001inc.com

Hours_of_Service: 8:00 - 5:00 CDT

Process_Step:

Process_Description:

The data is subjected to rigorous QA/QC according to the 3001 Inc. Quality Control Plan and procedures. Very briefly, a series of quantitative and visual procedures are employed to validate the accuracy and consistency of the data. Ground control is established by 3001, Inc. and GPS-derived ground control points (GCPs) points in various areas of dominant and prescribed land cover. These points are coded according to landcover, surface material and ground control suitability. A suitable number of points are selected for calculation of a statistically significant accuracy assessment as per the requirements of the National Standard for Spatial Data Accuracy. A spatial proximity analysis is used to select edited LiDAR data points within a specified distance of the relevant GCPs. A search radius decision rule is applied with consideration of terrain complexity, cumulative error and adequate sample size. Accuracy validation and evaluation is accomplished using proprietary software to apply relevant statistical routines for calculation of Root Mean Square Error (RMSE) and the National Standard for Spatial Data Accuracy (NSSDA) according to Federal Geographic Data Committee (FGDC) specifications.

Process_Date: 20090527

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: 3001 Inc.

Contact_Position: LiDAR Department

Contact_Address:

Address_Type: mailing and physical

Address: 501 Robert Blvd.

Address: 2nd Floor

City: Slidell

State_or_Province: Louisiana

Postal_Code: 70458

Country: USA

Contact_Voice_Telephone: (985) 661 - 3001

Contact_Facsimile_Telephone: (985) 649 - 5082

Contact_Electronic_Mail_Address: lidar@3001inc.com

Hours_of_Service: 8:00 - 5:00 CDT

Process_Step:

Process_Description:

The NOAA Coastal Services Center (CSC) received classified data (ASPRS LAS classifications include: 1 (unclassified), 2 (ground), 3 (Low Vegetation), 4 (Medium Vegetation), 5 (High Vegetation), 6 (Building), 7 (Low Point, (Noise)), and 9 (water)) in las format. The files contained LiDAR intensity and elevation measurements. CSC performed the following processing on the data for data storage and Digital Coast provisioning purposes: 1. The data were converted from NAVD88 heights to ellipsoid heights using Geoid03. 2. The LAS header fields were sorted by latitude and updated.

Process_Date: 201108

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NOAA Coastal Services Center

Contact_Address:

Address_Type: mailing and physical

Address: 2234 South Hobson Ave.

City: Charleston

State_or_Province: SC

Postal_Code: 29405

Country: US

Contact_Voice_Telephone: 843-740-1200

Contact_Electronic_Mail_Address: csc.info@noaa.gov

Cloud_Cover: 0

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Point

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.0000001

Longitude_Resolution: 0.0000001

Geographic_Coordinate_Units: Decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983

Ellipsoid_Name: Geodetic Reference System 80

Semi-major_Axis: 6378137.000000

Denominator_of_Flattening_Ratio: 298.257222

Vertical_Coordinate_System_Definition:

Altitude_System_Definition:

Altitude_Datum_Name: Ellipsoid

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: LAS V.1.1 LiDAR Data

Entity_Type_Definition: LAS Data

Entity_Type_Definition_Source: Contract

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NOAA Coastal Services Center

Contact_Address:

Address_Type: mailing and physical

Address: 2234 South Hobson Ave.

City: Charleston

State_or_Province: SC

Postal_Code: 29405-2413

Contact_Voice_Telephone: 843-740-1200

Contact_Electronic_Mail_Address: csc.info@noaa.gov

Resource_Description: Downloadable Data

Distribution_Liability:

Any conclusions drawn from the analysis of this information are not the responsibility of USACE, JALBTCX, the Coastal Services Center or its partners.

Custom_Order_Process:

This data can be obtained on-line at the following URL: http://www.csc.noaa.gov/lidar

Metadata_Reference_Information:

Metadata_Date: 20110902

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NOAA Coastal Services Center

Contact_Address:

Address_Type: mailing and physical

City: Charleston

State_or_Province: SC

Postal_Code: 29405-2413

Contact_Voice_Telephone: 843-740-1200

Contact_Electronic_Mail_Address: csc.info@noaa.gov

Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998