2004 USACE Puerto Rico Lidar

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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)
Originator: USACE, St. Louis District
Publication_Date: 2007
Title: 2004 USACE Puerto Rico Lidar
Publication_Information:
Publication_Place: Charleston, SC
Publisher: NOAA's Ocean Service, Coastal Services Center (CSC)
Online_Linkage: <http://csc.noaa.gov/htdata/lidar1_z/geoid12a/data/560/>
Online_Linkage: <http://www.csc.noaa.gov/lidar>
Online_Linkage: <http://www.csc.noaa.gov>
Description:
Abstract:
This record describes Light Detection and Ranging (Lidar) data acquired for the island of Puerto Rico. The data were acquired for USACE, St. Louis District by 3001, Inc., between January 10 and February 8, 2004. The mission was flown at a density sufficient to support a maximum final post spacing of 6 feet for unobscured areas. The Puerto Rico LiDAR Survey was collected under the guidance of a Professional Mapper/Surveyor.
Purpose:
The Puerto Rico LiDAR dataset will support the creation of Federal Emergency Management Agency (FEMA) Flood Insurance Rate Maps (FIRM) and anintegrated ground and surface water model.
Supplemental_Information:
The Lidar QA/QC Quantitative and Qualitative Assessment Report for this data set may be viewed at: <ftp://ftp.csc.noaa.gov/pub/crs/beachmap/qa_docs/pr/lidarqaqcreport_puertorico_final.pdf> A footprint of this data set may be viewed in Google Earth at: <ftp://ftp.csc.noaa.gov/pub/crs/beachmap/qa_docs/pr/2004_USACE_Puerto_Rico_Lidar.kmz>
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20040110
Ending_Date: 20040208
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -67.271346
East_Bounding_Coordinate: -65.204146
North_Bounding_Coordinate: 18.515932
South_Bounding_Coordinate: 17.913132
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: elevation
Theme_Keyword: 006
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Bathymetry/Topography
Theme_Keyword: Elevation
Theme_Keyword: Lidar
Theme_Keyword: LAS
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
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: USA
Place_Keyword: Puerto Rico
Place:
Place_Keyword_Thesaurus: CoRIS Place Thesaurus
Place_Keyword:
OCEAN BASIN > Atlantic Ocean > Caribbean Sea /North Atlantic Ocean > Puerto Rico > Puerto Rico (18N066W0000)
Place_Keyword:
COUNTRY/TERRITORY > United States of America > Puerto Rico > Puerto Rico (18N066W0000)
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 representactual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. Acknowledgement ofUSACE, St. Louis District would be appreciated in products derived from these data.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: 3001, Inc.
Contact_Position: LiDAR Department
Contact_Address:
Address_Type: mailing and physical address
Address: 501 Robert Rd., 2nd floor
City: Slidell
State_or_Province: LA
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
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722

Data_Quality_Information:
Logical_Consistency_Report: Unknown
Completeness_Report:
At the end of each flight, the Lidar data was processed to check for complete coverage and to verify that there were no voids in data coverage.
Positional_Accuracy:
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 groundcontrol points (GCP) and filtered LiDAR data points. Filtered LiDAR data has had vegetation and cultural features removed and by analysisrepresents bare-earth elevations. Testing was performed prior to gridding of the filtered LiDAR data points and construction of theIntergraph .dtm file format. The RMSE figure was used to compute the vertical National Standard for Spatial Data Accuracy (NSSDA). Ground controlwas established by 3001, Inc. A spatial proximity analysis was used to select edited LiDAR data points contiguous to the relevant GCPs. A searchradius decision rule is applied with consideration of terrain complexity, cumulative error and adequate sample size. Cumulative error results fromthe errors inherent in the various sources of horizontal measurement. These sources include the airborne GPS, GCPs and the uncertainty of theaccuracy of the LiDAR data points. This accuracy is achieved prior to the sub-sampling that occurs through integration with the inertialmeasurement unit (IMU) positions that are recorded. It is unclear at this time whether the initial accuracy is maintained. The horizontal accuracyof the GCPs is estimated to be in the range of approximately 1 to 1.6 feet. Finally, sample size was considered. The specification for the NationalStandard 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 indicatethat a minimum of 30 sample points provide a reasonable Approximation of a normal distribution. The intent of the NSSDA is to reflect the geographicarea of interest and the distribution of error in the data set (Federal Geographic Data Committee, 1998, Geospatial National Standard for SpatialData Accuracy, Federal Geographic Data Committee Secretariat, Reston, Virginia, p.3-4). Additional steps were taken to ensure the vertical accuracyof 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 (QualityControl) Step 5: 3-D digitizing and Photogrammetric Compilation of hydrographic breaklines.
Quantitative_Vertical_Positional_Accuracy_Assessment:
Vertical_Positional_Accuracy_Value: 11.90
Vertical_Positional_Accuracy_Explanation:
Based upon the result of vertical accuracy testing conducted by 3001, Inc., vertical accuracy at the 95% confidence level (Accuracyz) is computedby the formula RMSEz x 1.9600. The overall vertical accuracy of the Puerto Rico Lidar dataset is 11.90 cm, based upon an RMSEz of 6.07 cm.These values were derived from a comparison of Lidar data points that fell within a 1 m horizontal radius of 20 established ground control points.They represent the overall vertical accuracy in all surface types surveyed, which include ashphalt, dirt and mowed grass.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: USACE, St. Louis District
Publication_Date: 2007
Title: Puerto Rico LiDAR Survey
Geospatial_Data_Presentation_Form: vector digital data
Type_of_Source_Media: online
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20040110
Ending_Date: 20040208
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: Raw Lidar Scan Data
Source_Contribution:
The Puerto Rico LiDAR Survey was acquired for USACE, St. Louis District and processed by 3001, Inc.
Process_Step:
Process_Description:
The ABGPS, inertial measurement unit (IMU), and raw scans are collected during the LiDAR aerial survey. The ABGPS monitors the xyz position of thesensor and the IMU monitors the orientation. During the aerial survey laser pulses reflected from features on the ground surface are detected bythe receiver optics and collected by the data logger. GPS locations are based on data collection receivers on the aircraft and base stations on theground. The ground base stations are placed no more than 35 km radius from the flight survey area.
Process_Date: 2007
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: 3001, Inc.
Contact_Position: Lidar Department
Contact_Address:
Address_Type: mailing and physical address
Address: 501 Robert Blvd, 2nd Floor
City: Slidell
State_or_Province: LA
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 the Leica Geosystems and delivered with the Leica ALS50System. The resultant file is in a LAS binary file format. The LAS file version 1.0 format can 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 areproduced in the State Plane Puerto Rico FIPS 5200 coordinate system, with units in feet and referenced to the NAD83 horizontal datum and NAVD88vertical datum.
Process_Date: 2007
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: 3001, Inc.
Contact_Position: Lidar Department
Contact_Address:
Address_Type: mailing and physical address
Address: 501 Robert Blvd, 2nd Floor
City: Slidell
State_or_Province: LA
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 unedited data are classified to facilitate the application of the appropriate feature extraction filters. A combination of proprietary filtersis applied as appropriate for the production of bare-earth digital terrain models (DTMs). Interactive editing methods are applied to those areaswhere it is inappropriate or impossible to use the feature extraction filters, based upon the design criteria and/or limitations of the relevantfilters. These same feature extraction filters are used to produce elevation height surfaces.
Process_Date: 2007
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: 3001, Inc.
Contact_Position: Lidar Department
Contact_Address:
Address_Type: mailing and physical address
Address: 501 Robert Blvd, 2nd Floor
City: Slidell
State_or_Province: LA
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:
Filtered and edited data are subjected to rigorous QA/QC according to the 3001 Inc. Quality Control Plan and procedures. Very briefly, a seriesof quantitative and visual procedures are employed to validate the accuracy and consistency of the filtered and edited data. Ground control isestablished by 3001, Inc. and GPS-derived ground control points (GCPs) points in various areas of dominant and prescribed land cover. These pointsare coded according to landcover, surface material and ground control suitability. A suitable number of points are selected for calculation of astatistically significant accuracy assessment as per the requirements of the National Standard for Spatial Data Accuracy. A spatial proximityanalysis is used to select edited LiDAR data points within a specified distance of the relevant GCPs. A search radius decision rule is appliedwith consideration of terrain complexity, cumulative error and adequate sample size. Accuracy validation and evaluation is accomplished usingproprietary software to apply relevant statistical routines for calculation of Root Mean Square Error (RMSE) and the National Standard for SpatialData Accuracy (NSSDA) according the Federal Geographic Data Committee (FGDC) specifications.
Process_Date: 2007
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: 3001, Inc.
Contact_Position: Lidar Department
Contact_Address:
Address_Type: mailing and physical address
Address: 501 Robert Blvd, 2nd Floor
City: Slidell
State_or_Province: LA
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 LiDAR mass points were delivered in ASPRS LAS 1.0 format. The header file for each dataset is complete as defined by the LAS 1.0 specification.The LAS files do not include overlap. The delivered tiles are suitable for seamless topographic data mosaics that include no "no data" areas. Thenames of the tiles are left padded with zeros as required to achieve a five character length and all files utilize the LAS file extension.
Process_Date: 2007
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: 3001, Inc.
Contact_Position: Lidar Department
Contact_Address:
Address_Type: mailing and physical address
Address: 501 Robert Blvd, 2nd Floor
City: Slidell
State_or_Province: LA
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 the files in las format. The files contained Lidar elevation and intensity measurements.The data were in projected in Puerto Rico State Plane Coordinates (FIPS 5200/NAD83), and referenced to the orthometric datum of NAVD88 utilizingGeoid 99. Both planar and vertical units were measured in feet. CSC performed the following processing to the data to make it availablewithin the Digital Coast:1. The data were converted from State Plane Coordinates (NAD83; ft) to UTM coordinates (Zone 20/NAD83; m).2. The vertical units of the data were converted from NAVD88 (ft) to NAVD88 (m).3. The data were re-tiled using MARS software.4. The data were reclassified such that all classifications were set to Class 0.5. The data were filtered to Bare Earth (Class 2) and Unclassified (Class 1) using an automated process in LASEdit.6. The data were converted from UTM coordinates (Zone 20/NAD83) to geographic coordinates (NAD83) and ellipsoidal elevations (GRS80) using Geoid 99.7. The LAS data were sorted by latitude and the headers were updated.
Process_Date: 20101207
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NOAA Coastal Services Center
Contact_Position: Clearinghouse Manager
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: 843-740-1210
Contact_Electronic_Mail_Address: clearinghouse@noaa.gov

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
Entity_Type_Definition: Lidar point cloud LAS 1.0 format
Entity_Type_Definition_Source: "ASPRS LAS 1.0 Format Standard, May, 9, 2003"

Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NOAA Coastal Services Center
Contact_Position: Clearinghouse Manager
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: 843-740-1210
Contact_Electronic_Mail_Address: clearinghouse@noaa.gov
Resource_Description: Downloadable Data
Distribution_Liability:
Any conclusions drawn from the analysis of this information are not the responsibility of the Coastal Services Centeror its partners.

Metadata_Reference_Information:
Metadata_Date: 20140717
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NOAA Coastal Services Center
Contact_Position: Clearinghouse Manager
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: 843-740-1210
Contact_Electronic_Mail_Address: clearinghouse@noaa.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Online_Linkage:
<http://www.ncddc.noaa.gov/metadataresource/metadata-references/files/ncddcmdprofile_v2.pdf>


CoRIS:
CoRIS_Metadata_Link:
<http://www.coris.noaa.gov/metadata/records/html/2004usace_puertorico_met.html>
CoRIS_Tracking_ID: 6710

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