gov.noaa.nmfs.inport:48221 eng UTF8 dataset Office for Coastal Management resourceProvider NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information pointOfContact 2026-04-30T00:00:00 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) 2002 NOAA Lidar: Willapa Bay, WA Mudflat (WA) wa2002_noaa_willapa_mudflat_m12_metadata 2003-02-27 publication NOAA/NMFS/EDM 48221 https://www.fisheries.noaa.gov/inport/item/48221 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information https://coast.noaa.gov WWW:LINK-1.0-http--link Citation URL Online Resource download https://coast.noaa.gov/dataviewer WWW:LINK-1.0-http--link Citation URL Online Resource download 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. Original contact information: Contact Org: NOAA Office for Coastal Management Phone: 843-740-1202 Email: coastal.info@noaa.gov The elevation data will be used to investigate the impacts of invasive species on the local ecology. The 2002 Willapa Bay, WA Lidar data were collected by Spencer B. Gross, Inc. for the National Oceanic and Atmospheric Administration (NOAA) Office for Coastal Management and the Washington State Department of Natural Resources. completed NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information pointOfContact NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information custodian notPlanned EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION > TOPOGRAPHICAL RELIEF MAPS EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > SEAFLOOR TOPOGRAPHY EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION theme Global Change Master Directory (GCMD) Science Keywords 23.3 CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > WASHINGTON place Global Change Master Directory (GCMD) Location Keywords 23.3 Beach Erosion Invasive species Spartina alterniflora theme DOC/NOAA/NOS/OCM > Office of Coastal Management, National Ocean Service, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2017-04-24 publication 8.5 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2026. GCMD Keywords, Version 24. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Lidar project InPort otherRestrictions Cite As: Office for Coastal Management, [Date of Access]: 2002 NOAA Lidar: Willapa Bay, WA Mudflat (WA) [Data Date Range], https://www.fisheries.noaa.gov/inport/item/48221. NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose. otherRestrictions Access Constraints: None otherRestrictions 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 its limitations. otherRestrictions Distribution Liability: Any conclusions drawn from analysis of this information are not the responsibility of NOAA, Office for Coastal Management or its partners. unclassified vector eng; US elevation -124.277 -123.616 46.3479 46.7609 | Currentness: Ground Condition 2002-03-26 2002-04-24 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. The Willapa Bay, WA Lidar project boundary may be viewed at: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/12/supplemental/wa2002_noaa_willapa_mudflat_m12.kmz The Willapa Bay, WA Lidar Data Validation Report may be viewed at: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/12/supplemental/wa2002_noaa_willapa_mudflat_m12_surveyreport.pdf NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information distributor https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=12 WWW:LINK-1.0-http--link Customized Download Create custom data files by choosing data area, product type, map projection, file format, datum, etc. download https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/12/index.html WWW:LINK-1.0-http--link Bulk Download Simple download of data files. download dataset Accuracy 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. Horizontal Positional Accuracy RMSE at 1 sigma = 21 cm Vertical Positional Accuracy RMSE at 1 sigma = 12.8 cm Completeness Report None available Conceptual Consistency 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. 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. 2002-11-05T00:00:00 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 indicated 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. 2003-02-19T00:00:00 Source Contribution: Raw Lidar x-y-z elevation data files | Type of Source Media: CD-ROM Willapa Bay Lidar 2002-08-21 publication 2002-04-02 2002-04-24