2003 Oahu Coastline Lidar Mapping Project

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator:
Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC)
Publication_Date: 20061018
Title: 2003 Oahu Coastline Lidar Mapping Project
Geospatial_Data_Presentation_Form: Model
Publication_Information:
Publication_Place: Charleston, SC
Publisher: NOAA's Ocean Service, Coastal Services Center (CSC)
Online_Linkage: <http://www.csc.noaa.gov/digitalcoast/data/coastallidar>
Description:
Abstract:
LIDAR data is remotely sensed high-resolution elevation data collected by an airborne collection platform. Using a combination of laser rangefinding, GPS positioning and inertial measurement technologies; LIDAR instruments are able to make highly detailed Digital Elevation Models (DEMs) of the earth's terrain, man-made structures and vegetation. This data was collected over a 100 meter swath of the Oahu, Hawaii coastline with a Leica ALS-40 Aerial Lidar Sensor. Multiple returns were recorded for each pulse in addition to an intensity value.
Purpose:
The purpose of this mapping project is to create and deliver digital terrain models (DTM), to support the environmental, social, and economic well being of the coast by linking people, information, and technology. The data will support the local Coastal Zone Managers in their decision-making processes.
Supplemental_Information:
The 2003-2005 Hawaii Lidar Data Validation Report may be viewed at: <ftp://ftp.csc.noaa.gov/pub/crs/beachmap/qa_docs/hi>
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20031021
Ending_Date: 20031207
Currentness_Reference: Ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Unknown
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -158.28200
East_Bounding_Coordinate: -157.64879
North_Bounding_Coordinate: 21.728400
South_Bounding_Coordinate: 21.250250
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: elevation
Theme_Keyword: 006
Theme:
Theme_Keyword_Thesaurus: CoRIS Discovery Thesaurus
Theme_Keyword: Geographic Information > LiDAR
Theme:
Theme_Keyword_Thesaurus: CoRIS Theme Thesaurus
Theme_Keyword: EARTH SCIENCE > Land Surface > Topography > Terrain Elevation
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Bathymetry/Topography
Theme_Keyword: Digital Terrain Model
Theme_Keyword: DTM
Theme_Keyword: Lidar Point Cloud
Theme_Keyword: Lidar
Theme_Keyword: DEM
Theme_Keyword: Digital Elevation Model
Theme_Keyword: Elevation and derived products
Theme_Keyword: Elevation model
Theme_Keyword: LIDAR
Theme_Keyword: Surface model
Place:
Place_Keyword_Thesaurus: CoRIS Place Thesaurus
Place_Keyword:
OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Oahu Island > Oahu (21N157W0003)
Place_Keyword:
COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > Oahu (21N157W0003)
Place:
Place_Keyword_Thesaurus: CoRIS Region
Place_Keyword: MHI
Place:
Place_Keyword_Thesaurus: Geographic Names Information System
Place_Keyword: US
Place_Keyword: Hawaii
Place_Keyword: Oahu
Place_Keyword: Honolulu
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:
Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC)
Contact_Position: CEM Project Scientist
Contact_Address:
Address_Type: Mailing and physical address
Address: 2234 South Hobson Avenue
City: Charleston
State_or_Province: South Carolina
Postal_Code: 29405
Country: United States
Contact_Voice_Telephone: (843) 740-1200
Contact_Electronic_Mail_Address: tcm@csc.noaa.gov
Data_Set_Credit: n/a

Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
1. Lidar data was collected and processed in accordance with FEMA guidance as published in Appendix A, February, 2002. 2. Lidar data at the interface between the land and ocean was collected (when possible) during periods when tides were predicted to be below mean lower low water based upon NOAA CO-OPS tide predictions for the nearest tidal station. 3. Lidar data accuracy is in accordance with the National Standard for Spatial Accuracy (NSSDA). When compared to 14 GPS static survey points in open non-vegetated areas, at least 95% of the positions have an error less than or equal to 28.8 cm (equivalent to root mean square error of 14.7 cm).
Logical_Consistency_Report:
Compliance with the accuracy standard was ensured by the placement of GPS ground control prior to the acquisition of lidar data. The following checks were performed. 1. The ground control and airborne GPS data stream were validated through a fully analytical boresight adjustment. 2. The DTM (Digital Terrain Model) data were checked against the project control. 3. Lidar elevation data was validated through an inspection of edge matching and visual inspection for quality (artifact removal).
Completeness_Report:
1. EarthData's proprietary software, Checkedb, for verification against ground survey points. 2. Terrascan, for verification of automated and manual editing and final QC of products.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The lidar data fully comply with FEMA guidance as published in Appendix A, February, 2002.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
The lidar data fully comply with FEMA guidance as published in Appendix A, February, 2002 and National Standard for Spatial Accuracy (NSSDA). When compared to 14 GPS static survey points in open non-vegetated areas, at least 95% of the positions have an error less than or equal to 28.8 cm (equivalent to root mean square error of 14.7 cm).
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Kevin J. Chappell
Publication_Date: 20031105
Title: Report of Survey - Oahu, Hawaii
Geospatial_Data_Presentation_Form: Diagram
Type_of_Source_Media: Electronic mail system
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20031104
Ending_Date: 20031105
Source_Currentness_Reference: Ground Condition
Source_Citation_Abbreviation: Ground Control
Source_Contribution:
Kevin Chappell, of Terrasurv and under contract to EarthData International established 30 ground control points along the coastline of the island of Oahu and within a blocked area around Honolulu where the 2005 flight was flown. The points were surveyed using GPS for both vertical and horizontal coordinate values. The horizontal datum used was the North American Datum of 1983 (Pacific Plate Fixed Realization, epoch 2002.0). The vertical datum used was a Local Tidal Datum.
Source_Information:
Source_Citation:
Citation_Information:
Originator: EarthData Aviation, LLC
Publication_Date: 20031207
Title: Aerial Lidar Acquisition over Coastal Oahu, HI
Geospatial_Data_Presentation_Form: Model
Type_of_Source_Media: Firewire Drive
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20031021
Ending_Date: 20031207
Source_Currentness_Reference: Ground Condition
Source_Citation_Abbreviation: Aerial Lidar Acquisition
Source_Contribution:
Horizons Inc. was contracted by EarthData International to collect ALS-40 Lidar data over the coastal area of Oahu, Hawaii. The project site was flown on October 21 and November 1, 8, 24, 27, and December 7, 2003, using aircraft 2636P. Lidar data was captured using an ALS-40 Lidar system, including an inertial measuring unit (IMU) and a dual frequency GPS receiver. Lidar was obtained at an altitude of 1,524 meters (5,000 feet) above mean terrain, at an average airspeed of 110 knots. Sensor pulse rate was set at 20,000 Hz with a field of view of 20 degrees and a scan rate of 19 Hz. Average swath width of the collected raw lines is 537 meters. Point spacing was 2 meters. Lidar data was recorded in conjunction with airborne GPS and IMU; the stationary GPS receiver was positioned over a control point located at the airport. Recorded digital data was shipped via external hard drive to the production facility for processing. During airborne data collection, an additional GPS receiver was in constant operation over a published National Geodetic Survey (NGS) control point at Honolulu Airport. The coordinate value for temporary control point "PHNL" was determined by a network adjustment to CORS stations EHN1 and HNLC, both of which were tied to the project control network. During the data acquisition, the receivers collected phase data at an epoch rate of 1 Hz. All GPS phase data was post processed with continuous kinematic survey techniques using "On the Fly" (OTF) integer ambiguity resolution. The GPS data was processed with forward and reverse processing algorithms. An adjustment was made to the ellipsoid height of the published point by Terrasurv to reflect Local Tidal Elevation. The results from each process, using the data collected at the airport, were combined to yield a single fixed integer phase differential solution of the aircraft trajectory.
Process_Step:
Process_Description:
EarthData has developed a unique method for processing lidar data to identify and remove elevation points falling on vegetation, buildings, and other aboveground structures. The algorithms for filtering data were utilized within EarthData's proprietary software and commercial software written by TerraSolid. This software suite of tools provides efficient processing for small to large-scale, projects and has been incorporated into ISO 9001 compliant production work flows. The following is a step-by-step breakdown of the process. 1. Using the lidar data set provided by EarthData, the technician performs calibrations on the data set. 2. Using the lidar data set provided by EarthData, the technician performed a visual inspection of the data to verify that the flight lines overlap correctly. The technician also verified that there were no voids, and that the data covered the project limits. The technician then selected a series of areas from the data set and inspected them where adjacent flight lines overlapped. These overlapping areas were merged and a process which utilizes 3-D Analyst and EarthData's proprietary software was run to detect and color code the differences in elevation values and profiles. The technician reviewed these plots and located the areas that contained systematic errors or distortions that were introduced by the lidar sensor. 3. Systematic distortions highlighted in step 2 were removed and the data was re-inspected. Corrections and adjustments can involve the application of angular deflection or compensation for curvature of the ground surface that can be introduced by crossing from one type of land cover to another. 4. The lidar data for each flight line was trimmed in batch for the removal of the overlap areas between flight lines. The data was checked against a control network to ensure that vertical requirements were maintained. Conversion to the client-specified datum and projections were then completed. The lidar flight line data sets were then segmented into adjoining tiles for batch processing and data management. 5. The initial batch-processing run removed 95% of points falling on vegetation. The algorithm also removed the points that fell on the edge of hard features such as structures, elevated roadways and bridges. 6. The operator interactively processed the data using lidar editing tools. During this final phase the operator generated a TIN based on a desired thematic layer to evaluate the automated classification performed in step 5. This allowed the operator to quickly re-classify points from one layer to another and recreate the TIN surface to see the effects of edits. Geo-referenced images were toggled on or off to aid the operator in identifying problem areas. The data was also examined with an automated profiling tool to aid the operator in the reclassification. 6. The final DEM was written to an ESRI grid format (.flt). 7. The point cloud data were also delivered in LAS format.
Source_Used_Citation_Abbreviation: Lidar
Process_Date: 20050902
Source_Produced_Citation_Abbreviation: Lidar
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: EarthData International
Contact_Person: Harold Rempel
Contact_Position: Senior Project Manager
Contact_Address:
Address_Type: Mailing and physical address
Address: 7320 Executive Way
City: Frederick
State_or_Province: Maryland
Postal_Code: 21704
Contact_Voice_Telephone: 301-948-8550
Contact_Electronic_Mail_Address: metadata@earthdata.com
Process_Step:
Process_Description:
The NOAA Coastal Services Center (CSC) received LAS files containing the point cloud elevation data from Earth Data, Inc. CSC performed the following processing on the data to make it available within the Lidar Data Retrieval Tool (LDART): 1. Variable length header records were added to the LAS files to identify projection, datum and sort order. 2. The LAS files were sorted by latitude.
Process_Date: 20050927
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC)
Contact_Position: CEM Project Scientist
Contact_Address:
Address_Type: Mailing and physical address
Address: 2234 South Hobson Avenue
City: Charleston
State_or_Province: South Carolina
Postal_Code: 29405
Country: United States
Contact_Voice_Telephone: (843) 740-1200
Contact_Electronic_Mail_Address: tcm@csc.noaa.gov
Process_Step:
Process_Description:
For data management purposes, the Coastal Services Center converted the data from NAVD88 elevations to ellipsoid elevations using Geoid 99.
Process_Date: 200802
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC)
Contact_Position: CEM Project Scientist
Contact_Address:
Address_Type: Mailing and physical address
Address: 2234 South Hobson Avenue
City: Charleston
State_or_Province: South Carolina
Postal_Code: 29405
Country: United States
Contact_Voice_Telephone: (843) 740-1200
Contact_Electronic_Mail_Address: tcm@csc.noaa.gov
Cloud_Cover: 0

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Point
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Point

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.000000000419255512697643
Longitude_Resolution: 0.000000000390594694490901
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
Denominator_of_Flattening_Ratio: 298.257
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: Ellipsoid
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:
Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC)
Contact_Position: CEM Project Scientist
Contact_Address:
Address_Type: Mailing and physical address
Address: 2234 South Hobson Avenue
City: Charleston
State_or_Province: SC
Postal_Code: 29405-2413
Contact_Voice_Telephone: 843-740-1200
Contact_Electronic_Mail_Address: tcm@csc.noaa.gov
Resource_Description: Downloadable Data
Distribution_Liability:
Any conclusions drawn from analysis of this information are not the responsibility of NOAA or 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/digitalcoast/data/coastallidar>

Metadata_Reference_Information:
Metadata_Date: 20140605
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC)
Contact_Position: CEM Project Scientist
Contact_Address:
Address_Type: Mailing and physical address
Address: 2234 South Hobson Avenue
City: Charleston
State_or_Province: SC
Postal_Code: 29405-2413
Contact_Voice_Telephone: 843-740-1200
Contact_Electronic_Mail_Address: tcm@csc.noaa.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

CoRIS:
CoRIS_ID: 20100216075350
CoRIS_Children: None
CoRIS_Beginning_Date: 20031021
CoRIS_Ending_Date: 20031207
CoRIS_Metadata_Link:
<http://www.coris.noaa.gov/metadata/records/html/hicoast2003_template.html>
CoRIS_Tracking_ID: 4468

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