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    (NMMR Metadata gov.noaa.csc.maps:wa2002_willapa)

2002 Willapa Bay LiDAR Project

Frequently-asked questions:

What does this data set describe?
Title:

2002 Willapa Bay LiDAR Project

Abstract:

NOAA contracted with Spencer B. Gross, Inc. (SBG) to obtain airborne LiDAR of Willapa Bay, Washington during low tide conditions. The LiDAR data was processed to deliver topographic surface elevation data of the exposed intertidal flats and surrounding terrestrial areas.

Supplemental information:


The tide patterns of Willapa Bay required that the project area be divided into three sections, and LiDAR flights had to be flown in an East/West orientation to capture the low, low tide conditions. As the tidal waters moved throughout the Bay, flights were completed according to tide data provided by the University of California - Davis (Evolution & Ecology Dept.). Flights were completed during all acceptable periods - day or night.
1. How should this data set be cited?

Origin: Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC)
Pub Date: 20030227
Title: 2002 Willapa Bay LiDAR Project
Pubinfo: Charleston, SC NOAA's Ocean Service, Coastal Services Center (CSC)
Online links:
2. What geographic area does the data set cover?

Bounding coordinates:

West: -124.277
East: -123.616
North: 46.7609
South: 46.3479

3. What does it look like?

Please contact tcm@csc.noaa.gov for this information.

4. What is the temporal coverage of the data set?

Begdate: 20020326
Enddate: 20020424
5. What is the geospatial form of this data set?

Please contact tcm@csc.noaa.gov for this information.

6. How does the data set represent geographic features?

How are geographic features stored in the data set?

As a Point data set

What is the coordinate system used to represent geographic features?

Please contact tcm@csc.noaa.gov for this information.

7. What are the contents of this dataset?

Please contact tcm@csc.noaa.gov for this information.

Attribute Details

Please contact tcm@csc.noaa.gov for this information.

8. What were the instruments or sensors used to collect the data

Please contact tcm@csc.noaa.gov for this information.

9. What satellites, boats or other platforms housed the instruments?

Please contact tcm@csc.noaa.gov for this information.

10. What missions supported the platforms?

Please contact tcm@csc.noaa.gov for this information.

11. What online links are contained in this metadata record?


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Who produced the data set?
1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

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

2. Who also contributed to the data set?

The 2002 Willapa Bay, WA LiDAR data were collected by Spencer B. Gross, Inc. for the National Oceanic and Atmospheric Administration (NOAA) Coastal Services Center and the Washington State Department of Natural Resources.

3. To whom should users address questions about the data?

TCM Project Scientist
Department
2234 South Hobson Avenue
Charleston
South Carolina
29405
United States
843-740-1200 (voice)
(fax)
tcm@csc.noaa.gov (fax)

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Why was the data set created?
The elevation data will be used to investigate the impacts of invasive species on the local ecology.


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How was the data set created?
1. What are the data sources?

  • Pre-processing Validation Check - Airport and Project for each mission

    • 2. What changes have been made?

    Date Event
    20021105 The raw LiDAR data was checked for complete coverage following each mission and at the end of the flights. The data was pre-processed using SBG software to correctly establish the position of each x-y-z point. The data was checked again for completeness and conformance to specifications by comparisons to ground surveyed points. The LiDAR data was post-processed using a customized version of Terrasolid software and bare earth terrain models were developed.
    20030219 The post-processed data from Spencer B. Gross were delivered in Washington State Plane (South) projection referenced to NAD27 with vertical elevations in US survey feet referenced to NGVD29. The data were converted to geographic coordinates using General Cartographic Transformation Program software developed by the United States Geological Survey. The data were then transformed to NAD83 using NADCON grids from the National Geodetic Survey (NGS). A final datum transformation was performed to convert vertical elevations referenced to NGVD29 to NAVD88 using NGS VERTCON grids. A comparison of the LiDAR data to a ground truth data set indciated a 0.137m bias, which was removed. The data were then converted to a binary format and loaded into the LiDAR Data Retrieval Tool (LDART) database.
    20071226 The NOAA National Geophysical Data Center (NGDC) received Lidar data files on external harddrive. The disk contains LiDAR data from the NOAA Coastal Services Center. This data is currently being served via LDART at http://www.csc.noaa.gov/ldart . This data can be used to re-populate the system.

    3. Who is the person responsible for change?

    13545 NW Science Park Dr
    Portland
    OR
    97027
    USA
    503-646-1733 (voice)
    503-626-4818 (fax)
    mike@sbgmaps.com
    Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC)
    2234 South Hobson Avenue
    Charleston
    South Carolina
    29405
    843-740-1200 (voice)
    tcm@csc.noaa.gov
    Kelly Stroker
    DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
    NOAA/NESDIS/NGDC E/GC1 325 Broadway
    Boulder
    CO
    80305-3328
    USA
    (303) 497-4603 (voice)
    (303) 497-6513 (fax)
    kelly.stroker@noaa.gov
    Hours of Service: 0700 - 1700

    13545 NW Science Park Dr
    Portland
    OR
    97027
    USA
    503-646-1733 (voice)
    503-626-4818 (fax)
    mike@sbgmaps.com
    Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC)
    2234 South Hobson Avenue
    Charleston
    South Carolina
    29405
    843-740-1200 (voice)
    tcm@csc.noaa.gov
    Kelly Stroker
    DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
    NOAA/NESDIS/NGDC E/GC1 325 Broadway
    Boulder
    CO
    80305-3328
    USA
    (303) 497-4603 (voice)
    (303) 497-6513 (fax)
    kelly.stroker@noaa.gov

    13545 NW Science Park Dr
    Portland
    OR
    97027
    USA
    503-646-1733 (voice)
    503-626-4818 (fax)
    mike@sbgmaps.com
    Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC)
    2234 South Hobson Avenue
    Charleston
    South Carolina
    29405
    843-740-1200 (voice)
    tcm@csc.noaa.gov
    Kelly Stroker
    DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
    NOAA/NESDIS/NGDC E/GC1 325 Broadway
    Boulder
    CO
    80305-3328
    USA
    (303) 497-4603 (voice)
    (303) 497-6513 (fax)
    kelly.stroker@noaa.gov
    Hours of Service: 7:30-5:00 Mountain

    4. What data sources were used in this process?
    • Pre-processing Validation Check - Airport and Project for each mission
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    How reliable are the data; what problems remain in the data set?
    1. How well have the observations been checked?

      Independent ground control points were acquired using static GPS methods in flat open areas throughout the project area. These points were estimated to have a vertical accuracy of 0.02m. The processed LiDAR data were compared to ground control points within the project. LiDAR points surrounding the x-y of each ground control point were located. A triangulated irregular network (TIN) model was created and a z value was interpolated. The interpolated LiDAR z value at ground control x-y was compared to the ground control z. The mean elevation difference for all comparison was used to estimate and remove an elevation bias within the LiDAR data. The elevation bias was determined to be 0.137m. Removal of the bias resulted in a RMSE of 0.128m. Processing steps (datum conversion, projection, grid interpolation, etc.) introduce additional error factors which have not been tested and factored into the reported error.

    2. How accurate are the geographic locations?

      RMSE at 1 sigma = 21 cm

    3. How accurate are the heights or depths?

      RMSE at 1 sigma = 12.8 cm

    4. Where are the gaps in the data? What is missing?

      None available

    5. How consistent are the relationships among the observations, including topology?

      LiDAR Specifications: 7,000-feet AMT flight height; 24 degree field of view, 2.84-meter average post-spacing, 2978-foot swaths flown with 30% sidelap, 24,000 pulses per second; 1+1 collection (one return and one intensity value per pulse). LiDAR flown with an ADS40, Leica Geosystems LiDAR system, February 2002 model. The flight consisted of 71 E/W flight lines with 2 N/S cross flight lines for data calibration purposes: 800 flight line miles covering 274 square miles. For each lift, 2 flight lines were flown at the Astoria, OR airport for system calibration purposes.

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    How can someone get a copy of the data set?
    1. Are there legal restrictions on access or use of the data?

    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 the data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of it's limitations.

    2. Who distributes the data set?

    TCM Project Scientist
    Department
    2234 South Hobson Avenue
    Charleston
    SC
    29405-2413
    843-740-1200 (voice)
    (fax)
    tcm@csc.noaa.gov (fax)
    Kelly Stroker
    DOC/NOAA/NESDIS/NGDC
    NOAA/NESDIS/NGDC E/GC1 325 Broadway
    Boulder
    CO
    80305-3328
    USA
    (303) 497-4603 (voice)
    (303) 497-6513 (fax)
    kelly.stroker@noaa.gov (fax)
    TCM Project Scientist
    Department
    2234 South Hobson Avenue
    Charleston
    SC
    29405-2413
    843-740-1200 (voice)
    (fax)
    tcm@csc.noaa.gov (fax)
    Kelly Stroker
    DOC/NOAA/NESDIS/NGDC
    NOAA/NESDIS/NGDC E/GC1 325 Broadway
    Boulder
    CO
    80305-3328
    USA
    (303) 497-4603 (voice)
    (303) 497-6513 (fax)
    kelly.stroker@noaa.gov (fax)
    Hours of Service: 7:30-5:00 Mountain
    Contact Instructions: Contact Data Center

    3. What's the resource identifier I need to order this data set?

    Downloadable Data


    4. What legal disclaimers am I supposed to read?

    Any conclusions drawn from analysis of this information are not the responsibility of NOAA, Coastal Services Center or it's partners.

    Disclaimer While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.

    5. How can I download or order the data?

    Availability in non-digital form:

    Please contact tcm@csc.noaa.gov for this information.

    Availability in digital form:

    Format Name:
    Please contact tcm@csc.noaa.gov for this information.

    Network Links:
    Please contact tcm@csc.noaa.gov for this information.

    Off line media:
    Please contact tcm@csc.noaa.gov for this information.

    Cost:
    Please contact tcm@csc.noaa.gov for this information.

    Special Instructions:
    Please contact tcm@csc.noaa.gov for this information.

    Delivery:
    Please contact tcm@csc.noaa.gov for this information.

    6. Is there some other way to get the data?

    This data can be obtained on-line at the following URL: http://maps.csc.noaa.gov/TCM/. The data set is dynamically generated based on user-specified parameters.
    The National Geophysical Data Center serves as the archive for this LIDAR data. NGDC should only be contacted for this data if it cannot be obtained from NOAA Coastal Services Center.

    7. What hardware or software do I need in order to use the data set?

    Please contact tcm@csc.noaa.gov for this information.

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    Who wrote the metadata?
    Metadata author:

    Keil Schmid
    Department of Commerce (DOC), National Oceanic and Atmoshperic Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC)
    2234 South Hobson Avenue
    Charleston
    SC
    29405-2413
    843-740-1200 (voice)
    tcm@csc.noaa.gov

    Date Last Modified

    20080207

    Metadata Standard

    FGDC Content Standards for Digital Geospatial Metadata
    FGDC-STD-001-1998

    Metadata Extensions Used

    Please contact tcm@csc.noaa.gov for this information.

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    MISSION INFORMATION

    PLATFORM INFORMATION
    1. What platform/s (satellites, boats, planes) were utilized to create this dataset?

    Please contact tcm@csc.noaa.gov for this information.

    2. Who were the platform sponsors?

    Platform sponsor not available

    3. What is the description of the platform/s?

    4. What are the satellite orbit parameters?

    INSTRUMENT INFORMATION (General Overview)

    INSTRUMENT INFORMATION (Sensor Specific)
    1. What is the sensor rotation description?

    Rotation description not available

    2. What are the scan geometric properties?

    Scan geometric properties not available

    3. What are the scan cross track properties?

    Scan cross track properties not available

    4. What is the scan cross track description?

    Scan cross track description

    5. What are the instaneous field of view properties?

    Instaneous field of view properties not available

    6. What are the sample properties?

    Sample properties not available

    7. What are the scan radiometric properties?

    Scan radiometric properties not available

    8. What are the number of wavelength bands?

    Number of wavelength bands not available

    9. What are the wavelength band descriptions?

    Wavelength band descriptions not available

    10. What are the wavelength band properties?

    Wavelength band properties not available

    11. What is the band quality?

    Band quality information available

    12. What is the receiver polarization?

    Receiver polarization not available

    13. What are the instrument references?

    References not available