| 2022-2023 NOAA NGS Topobathy Lidar DEM: Coastal Maine | referenceSystemInfo|
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| (MI_Metadata) fileIdentifier: gov.noaa.nmfs.inport:77200 language: LanguageCode: eng characterSet: (MD_CharacterSetCode) UTF8 hierarchyLevel: (MD_ScopeCode) dataset hierarchyLevelName: Elevation contact: (CI_ResponsibleParty) organisationName: National Geodetic Survey contactInfo: (CI_Contact) phone: (CI_Telephone) voice: (missing) address: (CI_Address) role: (CI_RoleCode) resourceProvider contact: (CI_ResponsibleParty) organisationName: NOAA Office for Coastal Management contactInfo: (CI_Contact) phone: (CI_Telephone) voice: (843) 740-1202 address: (CI_Address) deliveryPoint: 2234 South Hobson Ave city: Charleston administrativeArea: SC postalCode: 29405-2413 country: (missing) electronicMailAddress: coastal.info@noaa.gov onlineResource: (CI_OnlineResource) linkage: https://coast.noaa.gov protocol: WWW:LINK-1.0-http--link name: NOAA Office for Coastal Management Website description: NOAA Office for Coastal Management Home Page function: (CI_OnLineFunctionCode) information role: (CI_RoleCode) pointOfContact dateStamp: DateTime: 2025-08-26T14:33:32 metadataStandardName: ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data metadataStandardVersion: ISO 19115-2:2009(E) return to top referenceSystemInfo: (MD_ReferenceSystem) referenceSystemIdentifier: (RS_Identifier) code: EPSG::6348 return to top identificationInfo: (MD_DataIdentification) citation: (CI_Citation) title: 2022-2023 NOAA NGS Topobathy Lidar DEM: Coastal Maine date: (CI_Date) date: 2025 dateType: (CI_DateTypeCode) creation date: (CI_Date) date: (missing) dateType: (CI_DateTypeCode) publication identifier: (MD_Identifier) authority: (CI_Citation) title: NOAA/NMFS/EDM date: (inapplicable) code: Anchor: InPort Catalog ID 77200 citedResponsibleParty: (CI_ResponsibleParty) organisationName: (inapplicable) contactInfo: (CI_Contact) onlineResource: (CI_OnlineResource) linkage: https://www.fisheries.noaa.gov/inport/item/77200 protocol: WWW:LINK-1.0-http--link name: Full Metadata Record description: View the complete metadata record on InPort for more information about this dataset. function: (CI_OnLineFunctionCode) information role: (inapplicable) citedResponsibleParty: (CI_ResponsibleParty) organisationName: National Geodetic Survey contactInfo: (CI_Contact) phone: (CI_Telephone) voice: (missing) address: (CI_Address) deliveryPoint: 1315 East-West Hwy city: Silver Spring administrativeArea: MD postalCode: 20910 country: (missing) electronicMailAddress: (missing) onlineResource: (CI_OnlineResource) linkage: https://geodesy.noaa.gov/ protocol: WWW:LINK-1.0-http--link name: National Geodetic Survey Website description: Website listed for National Geodetic Survey function: (CI_OnLineFunctionCode) information role: (CI_RoleCode) originator citedResponsibleParty: (CI_ResponsibleParty) organisationName: (inapplicable) contactInfo: (CI_Contact) onlineResource: (CI_OnlineResource) linkage: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/10225/supplemental/MD2201_Chesapeake_QualityAssuranceReport_r0.pdf protocol: WWW:LINK-1.0-http--link name: Topobathy Lidar Data Report description: Topobathy Lidar Data Report function: (CI_OnLineFunctionCode) download role: (inapplicable) presentationForm: (unknown) abstract: The NOAA Maine Topbathymetric Lidar was collected by NV5 using Leica Chiroptera Hawkeye 4X systems. The lidar acquisitions were flown between 20221006 and 20231216 in 120 missions. The dataset includes topobathymetric data in a LAS format 1.4, point data record format 6, with the following classifications in accordance with project specifications and the American Society for Photogrammetry and Remote Sensing (ASPRS) classification standards: 1 - Unclassified 1W - Withheld - edge clip 1OW - Overlap Withheld - unrefracted green data from Chiroptera sensor 2 - Ground 7W - Withheld -low noise 18W - Withheld - high noise 40 - Bathymetric bottom or submerged topography 41 - Water surface 42S - Synthetic- Chiroptera synthetic water surface 43 - Submerged feature 45 - Water column 64 - Submerged Aquatic Vegetation (SAV) 65O - Overlap bathy bottom - temporally different from a separate lift 71 - Unclassified associated with areas of overlap bathy bottom/temporal bathymetric differences 72 - Ground associated with areas of overlap bathy bottom/temporal bathymetric differences 81 - Water surface associated with areas of overlap bathy bottom/temporal bathymetric differences 82S - Synthetic - Chiroptera synthetic water surface associated with areas of overlap bathy bottom/temporal bathymetric differences 85 - Water column associated with areas of overlap bathy bottom/temporal bathymetric differences. This dataset also includes lidar intensity values, number of returns, return number, time, and scan angle. After the initial data submission, NOAA reviewed the data. NV5 corrected the feedback edits and incorporated them into the dataset delivery. Additionally, green laser intensity values were normalized for depth for the dataset resulting in a full redelivery of all LAS files and topobathymetric bare earth models. The final classified lidar data were then transformed from ellipsoid (GRS80) to geoidal height (Geoid18) and used to create topobathymetric DEMs in Cloud Optimized GeoTIFF format with 1m pixel resolution. purpose: This lidar data was required by National Oceanic and Atmospheric Administration (NOAA) and the National Geodetic Survey (NGS), Remote Sensing Division Coastal Mapping Program (CMP) to enable accurate and consistent measurement of the national shoreline. The CMP works to provide a regularly updated and consistent national shoreline to define America's marine territorial limits and manage coastal resources. credit: We request that you credit the National Oceanic and Atmospheric Administration (NOAA) when you use these data in a report, publication, or presentation. status: (MD_ProgressCode) completed pointOfContact: (CI_ResponsibleParty) organisationName: NOAA Office for Coastal Management contactInfo: (CI_Contact) phone: (CI_Telephone) voice: (843) 740-1202 address: (CI_Address) deliveryPoint: 2234 South Hobson Ave city: Charleston administrativeArea: SC postalCode: 29405-2413 country: (missing) electronicMailAddress: coastal.info@noaa.gov onlineResource: (CI_OnlineResource) linkage: https://coast.noaa.gov protocol: WWW:LINK-1.0-http--link name: NOAA Office for Coastal Management Website description: NOAA Office for Coastal Management Home Page function: (CI_OnLineFunctionCode) information role: (CI_RoleCode) custodian resourceMaintenance: (MD_MaintenanceInformation) maintenanceAndUpdateFrequency: (MD_MaintenanceFrequencyCode) notPlanned graphicOverview: (MD_BrowseGraphic) fileName: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/10225/supplemental/extent_ngs_bethany_2022_m10225.kmz fileDescription: This graphic shows the lidar footprint for this dataset. fileType: kmz descriptiveKeywords: (MD_Keywords) keyword: EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION > DIGITAL ELEVATION/TERRAIN MODEL (DEM) keyword: EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION > TOPOGRAPHICAL RELIEF MAPS keyword: EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > BATHYMETRY > COASTAL BATHYMETRY keyword: EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION type: (MD_KeywordTypeCode) theme thesaurusName: (CI_Citation) title: Global Change Master Directory (GCMD) Science Keywords date: (missing) edition: 17.0 descriptiveKeywords: (MD_Keywords) keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MAINE type: (MD_KeywordTypeCode) place thesaurusName: (CI_Citation) title: Global Change Master Directory (GCMD) Location Keywords date: (missing) edition: 20.8 descriptiveKeywords: (MD_Keywords) keyword: LIDAR > Light Detection and Ranging type: (MD_KeywordTypeCode) instrument thesaurusName: (CI_Citation) title: Global Change Master Directory (GCMD) Instrument Keywords date: (missing) edition: 17.2 descriptiveKeywords: (MD_Keywords) keyword: Airplane > Airplane type: (MD_KeywordTypeCode) platform thesaurusName: (CI_Citation) title: Global Change Master Directory (GCMD) Platform Keywords date: (missing) edition: 17.2 descriptiveKeywords: (MD_Keywords) keyword: DOC/NOAA/NOS/NGS > National Geodetic Survey, National Ocean Service, NOAA, U.S. Department of Commerce type: (MD_KeywordTypeCode) dataCentre thesaurusName: (CI_Citation) title: Global Change Master Directory (GCMD) Data Center Keywords date: (CI_Date) date: 2017-04-24 dateType: (CI_DateTypeCode) publication edition: 8.5 citedResponsibleParty: GCMD Landing Page descriptiveKeywords: (MD_Keywords) keyword: NGS Lidar type: (MD_KeywordTypeCode) project thesaurusName: (CI_Citation) title: InPort date: (inapplicable) resourceConstraints: (MD_LegalConstraints) useConstraints: (MD_RestrictionCode) otherRestrictions otherConstraints: Cite As: National Geodetic Survey, [Date of Access]: 2022-2023 NOAA NGS Topobathy Lidar DEM: Coastal Maine [Data Date Range], https://www.fisheries.noaa.gov/inport/item/77200. resourceConstraints: (MD_Constraints) useLimitation: 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. resourceConstraints: (MD_LegalConstraints) accessConstraints: (MD_RestrictionCode) otherRestrictions otherConstraints: Access Constraints: None resourceConstraints: (MD_LegalConstraints) useConstraints: (MD_RestrictionCode) otherRestrictions otherConstraints: 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. resourceConstraints: (MD_LegalConstraints) useLimitation: (MD_RestrictionCode) otherRestrictions otherConstraints: Distribution Liability: Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the National Geodetic Survey, the Office for Coastal Management, or its partners. resourceConstraints: (MD_SecurityConstraints) classification: (MD_ClassificationCode) unclassified classificationSystem: (missing) handlingDescription: (missing) aggregationInfo: (MD_AggregateInformation) aggregateDataSetName: (CI_Citation) title: NOAA Data Management Plan (DMP) date: (unknown) identifier: (MD_Identifier) authority: (CI_Citation) title: NOAA/NMFS/EDM date: (inapplicable) code: 77200 citedResponsibleParty: (CI_ResponsibleParty) organisationName: (inapplicable) contactInfo: (CI_Contact) onlineResource: (CI_OnlineResource) linkage: https://www.fisheries.noaa.gov/inportserve/waf/noaa/nos/ngs/dmp/pdf/77200.pdf protocol: WWW:LINK-1.0-http--link name: NOAA Data Management Plan (DMP) description: NOAA Data Management Plan for this record on InPort. function: (CI_OnLineFunctionCode) information role: (inapplicable) associationType: (DS_AssociationTypeCode) crossReference language: eng; US topicCategory: (MD_TopicCategoryCode) elevation environmentDescription: OS Independent extent: (EX_Extent) description: Block01_01 geographicElement: (EX_GeographicBoundingBox) westBoundLongitude: -67.26 eastBoundLongitude: -66.9 southBoundLatitude: 44.68 northBoundLatitude: 45.17 geographicElement: (EX_GeographicDescription) geographicIdentifier: (MD_Identifier) code: This block was acquired in 7 missions and is comprised of 2,561 (500 m x 500 m) LAS tiles . temporalElement: (EX_TemporalExtent) extent: TimePeriod: description: | Currentness: Ground Condition beginPosition: 2022-10-08 endPosition: 2022-10-23 extent: (EX_Extent) description: Block01_02 geographicElement: (EX_GeographicBoundingBox) westBoundLongitude: -67.62 eastBoundLongitude: -67.05 southBoundLatitude: 44.41 northBoundLatitude: 44.87 geographicElement: (EX_GeographicDescription) geographicIdentifier: (MD_Identifier) code: This block was acquired in 14 missions and is comprised of 3,299 (500 m x 500 m) LAS tiles. temporalElement: (EX_TemporalExtent) extent: TimePeriod: description: | Currentness: Ground Condition beginPosition: 2022-10-06 endPosition: 2022-11-10 extent: (EX_Extent) description: Block02_01 geographicElement: (EX_GeographicBoundingBox) westBoundLongitude: -68.12 eastBoundLongitude: -67.54 southBoundLatitude: 44.26 northBoundLatitude: 44.67 geographicElement: (EX_GeographicDescription) geographicIdentifier: (MD_Identifier) code: This block was acquired in 18 missions and is comprised of 3,846 (500 m x 500 m) LAS tiles. temporalElement: (EX_TemporalExtent) extent: TimePeriod: description: | Currentness: Ground Condition beginPosition: 2022-10-06 endPosition: 2023-07-20 extent: (EX_Extent) description: Block02_02 geographicElement: (EX_GeographicBoundingBox) westBoundLongitude: -68.46 eastBoundLongitude: -67.991 southBoundLatitude: 44.12 northBoundLatitude: 44.61 geographicElement: (EX_GeographicDescription) geographicIdentifier: (MD_Identifier) code: This block was acquired in 28 missions and is comprised of 4,195 (500 m x 500 m) LAS tiles. temporalElement: (EX_TemporalExtent) extent: TimePeriod: description: | Currentness: Ground Condition beginPosition: 2022-10-07 endPosition: 2023-08-06 extent: (EX_Extent) description: Block02_03 geographicElement: (EX_GeographicBoundingBox) westBoundLongitude: -68.87 eastBoundLongitude: -68.24 southBoundLatitude: 43.97 northBoundLatitude: 44.52 geographicElement: (EX_GeographicDescription) geographicIdentifier: (MD_Identifier) code: This block was acquired in 31 missions and is comprised of 5,393 (500 m x 500 m) LAS tiles. temporalElement: (EX_TemporalExtent) extent: TimePeriod: description: | Currentness: Ground Condition beginPosition: 2022-10-12 endPosition: 2023-07-20 extent: (EX_Extent) description: Block03_01 geographicElement: (EX_GeographicBoundingBox) westBoundLongitude: -70.96 eastBoundLongitude: -70.19 southBoundLatitude: 42.82 northBoundLatitude: 43.59 geographicElement: (EX_GeographicDescription) geographicIdentifier: (MD_Identifier) code: This block was acquired in 20 missions and is comprised of 5,490 (500 m x 500 m) LAS tiles. extent: (EX_Extent) description: Block03_02 geographicElement: (EX_GeographicBoundingBox) westBoundLongitude: -70.33 eastBoundLongitude: -69.66 southBoundLatitude: 43.5 northBoundLatitude: 44.15 geographicElement: (EX_GeographicDescription) geographicIdentifier: (MD_Identifier) code: This block was acquired in 27 missions and is comprised of 6,188 (500 m x 500 m) LAS tiles. temporalElement: (EX_TemporalExtent) extent: TimePeriod: description: | Currentness: Ground Condition beginPosition: 2023-05-12 endPosition: 2023-12-15 extent: (EX_Extent) description: Block04_01 geographicElement: (EX_GeographicBoundingBox) westBoundLongitude: -69.74 eastBoundLongitude: -69.24 southBoundLatitude: 43.69 northBoundLatitude: 44.1 geographicElement: (EX_GeographicDescription) geographicIdentifier: (MD_Identifier) code: This block was acquired in 22 missions and is comprised of 3,811 (500 m x 500 m) LAS tiles. temporalElement: (EX_TemporalExtent) extent: TimePeriod: description: | Currentness: Ground Condition beginPosition: 2023-05-12 endPosition: 2023-08-10 extent: (EX_Extent) description: Block04_02 geographicElement: (EX_GeographicBoundingBox) westBoundLongitude: -69.44 eastBoundLongitude: -68.62 southBoundLatitude: 43.89 northBoundLatitude: 44.59 geographicElement: (EX_GeographicDescription) geographicIdentifier: (MD_Identifier) code: This block was acquired in 38 missions and is comprised of 4,174 (500 m x 500 m) LAS tiles. temporalElement: (EX_TemporalExtent) extent: TimePeriod: description: | Currentness: Ground Condition beginPosition: 2022-11-18 endPosition: 2023-12-16 extent: (EX_Extent) description: Block04_03 geographicElement: (EX_GeographicBoundingBox) westBoundLongitude: -69.25 eastBoundLongitude: -68.68 southBoundLatitude: 43.77 northBoundLatitude: 44.43 geographicElement: (EX_GeographicDescription) geographicIdentifier: (MD_Identifier) code: This block was acquired in 51 missions and is comprised of 5,347 (500 m x 500 m) LAS tiles. temporalElement: (EX_TemporalExtent) extent: TimePeriod: description: | Currentness: Ground Condition beginPosition: 2022-11-21 endPosition: 2023-12-16 supplementalInformation: The NOAA Maine Topbathymetric Lidar data includes all lidar returns. An automated grounding classification algorithm was used to determine bare earth and submerged topography point classification. The automated grounding was followed with manual editing. Classes 2 (ground), 40 (submerged topography), and 43 (submerged object) were used to create the final DEMs. The full workflow used for this project are documented in the NOAA Maine Topobathymetric Lidar final report. Please note tiles 2022_650000e_4995000n_dem and 2022_660000e_4980000n_dem are fully encompassed within bathymetric void areas and thus have not been provided. return to top distributionInfo: (MD_Distribution) distributionFormat: (MD_Format) name: ZIP version: (missing) fileDecompressionTechnique: Zip distributionFormat: (MD_Format) name: LAS/LAZ - LASer version: (missing) fileDecompressionTechnique: LAZ distributor: (MD_Distributor) distributorContact: (CI_ResponsibleParty) organisationName: NOAA Office for Coastal Management contactInfo: (CI_Contact) phone: (CI_Telephone) voice: (843) 740-1202 address: (CI_Address) deliveryPoint: 2234 South Hobson Ave city: Charleston administrativeArea: SC postalCode: 29405-2413 country: (missing) electronicMailAddress: coastal.info@noaa.gov onlineResource: (CI_OnlineResource) linkage: https://coast.noaa.gov protocol: WWW:LINK-1.0-http--link name: NOAA Office for Coastal Management Website description: NOAA Office for Coastal Management Home Page function: (CI_OnLineFunctionCode) information role: (CI_RoleCode) distributor transferOptions: (MD_DigitalTransferOptions) onLine: (CI_OnlineResource) linkage: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=10225 protocol: WWW:LINK-1.0-http--link name: Customized Download description: Create custom data files by choosing data area, product type, map projection, file format, datum, etc. function: (CI_OnLineFunctionCode) download transferOptions: (MD_DigitalTransferOptions) onLine: (CI_OnlineResource) linkage: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/10225/index.html protocol: WWW:LINK-1.0-http--link name: Bulk Download description: Simple download of data files. function: (CI_OnLineFunctionCode) download return to top dataQualityInfo: (DQ_DataQuality) scope: (DQ_Scope) level: (MD_ScopeCode) dataset report: (DQ_QuantitativeAttributeAccuracy) nameOfMeasure: Accuracy evaluationMethodDescription: Horizontal - Lidar horizontal accuracy is a function of Global Navigation Satellite System (GNSS) derived positional error, flying altitude, and INS derived attitude error. The obtained RMSEr value is multiplied by a conversion factor of 1.7308 to yield the horizontal component of the National Standards for Spatial Data Accuracy (NSSDA) reporting standard where a theoretical point will fall within the obtained radius 95 percent of the time (ACCr). Vertical - Absolute accuracy was assessed using both Non-Vegetated Vertical Accuracy (NVA) and Vegetated Vertical Accuracy (VVA) survey methods. Survey checkpoints were evenly distributed as feasible throughout the project area. NVA compares known ground check point data that were withheld from the calibration and post-processing of the lidar point cloud to the derived gridded bare earth DEM. NVA is a measure of the accuracy of lidar point data in open areas with level slope (less than 20 degrees) where the lidar system has a high probability of measuring the ground surface and is evaluated at the 95% confidence interval (1.96*RMSE). Non-Vegetated Vertical Accuracy (NVA) and Vegetated Vertical Accuracy (VVA) were evaluated at the 95% confidence interval (1.96*RMSE). result: (missing) report: (DQ_AbsoluteExternalPositionalAccuracy) nameOfMeasure: Horizontal Positional Accuracy evaluationMethodDescription: Block01_01: At a flight altitude of 400 m, with an IMU error of 0.002 decimal degrees and a GNSS positional error of 0.005 m: Leica Chiroptera: RMSEr = 0.025 m, ACCr = 0.040 m (95%). Leica Hawkeye: RMSEr = 0.025 m, ACCr = 0.040 m (95%). Block01_02: At a flight altitude of 400 m, with an IMU error of 0.003 decimal degrees and a GNSS positional error of 0.008 m: Leica Chiroptera: RMSEr = 0.038 m, ACCr = 0.070 m (95%). Leica Hawkeye: RMSEr = 0.038 m, ACCr = 0.070 m (95%). Block02_01: At a flight altitude of 400 m, with an IMU error of 0.003 decimal degrees and a GNSS positional error of 0.008 m: Leica Chiroptera: RMSEr = 0.038 m, ACCr = 0.070 m (95%). Leica Hawkeye: RMSEr = 0.038 m, ACCr = 0.070 m (95%). Block02_02: At a flight altitude of 400 m, with an IMU error of 0.003 decimal degrees and a GNSS positional error of 0.008 m: Leica Chiroptera: RMSEr = 0.038 m, ACCr = 0.070 m (95%). Leica Hawkeye: RMSEr = 0.062 m, ACCr = 0.11 m (95%). Block02_03: At a flight altitude of 400 m, with an IMU error of 0.003 decimal degrees and a GNSS positional error of 0.008 m: Leica Chiroptera: RMSEr = 0.038 m, ACCr = 0.070 m (95%). Leica Hawkeye: RMSEr = 0.062 m, ACCr = 0.11 m (95%). Block03_01: At a flight altitude of 400 m, with an IMU error of 0.003 decimal degrees and a GNSS positional error of 0.008 m: Leica Chiroptera: RMSEr = 0.038 m, ACCr = 0.070 m (95%). Leica Hawkeye: RMSEr = 0.038 m, ACCr = 0.070 m (95%). Block03_02: At a flight altitude of 400 m, with an IMU error of 0.003 decimal degrees and a GNSS positional error of 0.023 m: Leica Chiroptera: RMSEr = 0.044 m, ACCr = 0.080 m (95%). Leica Hawkeye: RMSEr = 0.131 m, ACCr = 0.23 m (95%). Block04_01: At a flight altitude of 400 m, with an IMU error of 0.003 decimal degrees and a GNSS positional error of 0.008 m: Leica Chiroptera: RMSEr = 0.038 m, ACCr = 0.070 m (95%). Leica Hawkeye: RMSEr = 0.038 m, ACCr = 0.070 m (95%). Block04_02: At a flight altitude of 400 m, with an IMU error of 0.003 decimal degrees and a GNSS positional error of 0.008 m: Leica Chiroptera: RMSEr = 0.038 m, ACCr = 0.070 m (95%). Leica Hawkeye: RMSEr = 0.038 m, ACCr = 0.070 m (95%). Block04_03: At a flight altitude of 400 m, with an IMU error of 0.003 decimal degrees and a GNSS positional error of 0.008 m: Leica Chiroptera: RMSEr = 0.038 m, ACCr = 0.070 m (95%). Leica Hawkeye: RMSEr = 0.038 m, ACCr = 0.070 m (95%). result: (missing) report: (DQ_AbsoluteExternalPositionalAccuracy) nameOfMeasure: Vertical Positional Accuracy evaluationMethodDescription: Block01_01 - NVA tested 0.066 m using 5 ground check points based on RMSEz (0.034 m) x 1.9600. VVA tested 0.353 m using 2 landclass points. Block01_02 - NVA tested 0.071 m using 7 ground check points based on RMSEz (0.036 m) x 1.9600. VVA tested 0.124 m using 6 landclass points. Block02_01 - NVA tested 0.043 m using 6 ground check points based on RMSEz (0.022 m) x 1.9600. VVA tested 0.147 m using 5 landclass points. Block02_02 - NVA tested 0.067 m using 9 ground check points based on RMSEz (0.034 m) x 1.9600. VVA tested 0.218 m using 8 landclass points. Block02_03 - NVA tested 0.057 m using 6 ground check points based on RMSEz (0.029 m) x 1.9600. VVA tested 0.141 m using 3 landclass points. Block03_01 - NVA tested 0.045 m using 15 ground check points based on RMSEz (0.023 m) x 1.9600. VVA tested 0.298 m using 12 landclass points. Block03_02 - NVA tested 0.064 m using 9 ground check points based on RMSEz (0.033 m) x 1.9600. VVA tested 0.251 m using 9 landclass points. Block04_01 - NVA tested 0.053 m using 8 ground check points based on RMSEz (0.027 m) x 1.9600. VVA tested 0.148 m using 5 landclass points. Block04_02 - NVA tested 0.057 m using 11 ground check points based on RMSEz (0.029 m) x 1.9600. VVA tested 0.169 m using 8 landclass points. Block04_03 - NVA tested 0.022 m using 4 ground check points based on RMSEz (0.011 m) x 1.9600. VVA tested 0.177 m using 4 landclass points. result: (missing) lineage: (LI_Lineage) statement: (missing) processStep: (LI_ProcessStep) description: Data for the NOAA Maine Topbathymetric Lidar Delivery was acquired by NV5 Geospatial (NV5) using Leica Chiroptera Hawkeye 4X and Leica Chiroptera Hawkeye 5 topobathymetric lidar systems. All derived LAS data is referenced to: Horizontal Datum-NAD83(2011) epoch: 2010.00 Projection-UTM Zone 19N Horizontal Units-meters Vertical Datum-NAVD88 (Geoid18) Vertical Units-meters NOAA provided NV5 Geospatial with a project boundary for the NOAA Maine Topobathymetric Lidar project. Using a 100 meter buffered boundary, NV5 created an airborne lidar acquisition plan. The collected lidar data were immediately processed in the field by NV5 to a level that will allow QA\QC measures to determine if the sensor is functioning properly and assess the coverage of submerged topography. An initial SBET was created using Waypoint Inertial Explorer 8.90, and the raw data were extracted into geo-referenced LAS files using Lidar Survey Studio 3.0 with pre-calculated scanner misalignment angles determined through a boresight protocol. These files were inspected for errors and then passed through an automated workflow, producing rasters to develop an initial assessment of bathymetric coverage. NV5 reviewed all acquired flight lines to ensure complete coverage and positional accuracy of the laser points. These rasters were also used to create an initial product in Quick Look Coverage Maps. These Quick Look files are not fully processed data or final products but provide rapid assessment of approximate coverage and depth penetration. dateTime: DateTime: 2023-10-06T00:00:00 processor: (CI_ResponsibleParty) organisationName: National Geodetic Survey role: (CI_RoleCode) processor processStep: (LI_ProcessStep) description: For Block 01_01, Block 01_02, Block 02_01, and Block 02_02,NV5 resolved kinematic corrections for aircraft position data using aircraft GNSS and Applanix's proprietary PP-RTX solution. When PP-RTX was not used NV5 conducted static Global Navigation Satellite System (GNSS) ground surveys (1 Hz recording frequency) using base stations over known monument locations during flights. After the airborne survey, static GPS data were triangulated with nearby Continuously Operating Reference Stations (CORS) using the Online Positioning User Service (OPUS) for precise positioning. Multiple independent sessions over the same base station were performed to confirm antenna height measurements and to refine position accuracy. dateTime: DateTime: 2025-03-07T00:00:00 processor: (CI_ResponsibleParty) organisationName: National Geodetic Survey role: (CI_RoleCode) processor processStep: (LI_ProcessStep) description: For Block 02_03, Block 03_01, Block 03_02, Block 04_01, Block 04_02 and Block 04_03, NV5 resolved kinematic corrections for the aircraft Global Navigation Satellite System (GNSS) data using static GPS data from Continuously Operating Reference Stations (CORS) utilizing the Online Positioning User Service (OPUS) for precise positioning. This data was used to correct the continuous on board measurements of the aircraft position recorded throughout the flight. When GNSS was not utilized, kinematic corrections for aircraft position data were corrected using aircraft GNSS and Novatel's proprietary PPP-AR solution. dateTime: DateTime: 2025-03-07T00:00:00 processor: (CI_ResponsibleParty) organisationName: National Geodetic Survey role: (CI_RoleCode) processor processStep: (LI_ProcessStep) description: This data was used to correct the continuous on board measurements of the aircraft position recorded throughout the flight. A final smoothed best estimate trajectory (SBET) was developed that blends post-processed aircraft position with attitude data. Using the SBETs, sensor head position and attitude were then calculated throughout the survey. Trimble Business Center v.3.90, Blue Marble Geographic Calculator 2019, and PosPac MMS 8.3 SP3 were used for these processes. dateTime: DateTime: 2025-03-07T00:00:00 processor: (CI_ResponsibleParty) organisationName: National Geodetic Survey role: (CI_RoleCode) processor processStep: (LI_ProcessStep) description: Following the final SBET creation, NV5 used Leica Lidar Survey Studio (LSS) to calculate laser point positioning by associating SBET positions to each laser point return time, scan angle, and intensity. Leica LSS was used to derive a synthetic water surface to create a water surface model. Light travels at different speeds in air versus water and its direction of travel or angle is changed or refracted when entering the water column. The refraction tool corrects for this difference by adjusting the depth (distance traveled) and horizontal positioning (change of angle/direction) of the lidar data. All lidar data below water surface models were classified as water column to correct for refraction. Using raster-based QC methods, the output data is verified to ensure the refraction tool functioned properly. Once all data was refracted by flight line, the data was exported to LAS 1.4 format and combined into 500 m x 500 m tiles. Data were then further calibrated using TerraMatch. NV5 used custom algorithms in TerraScan to classify the initial ground/submerged topography surface points. Relative accuracy of overlapping swaths was compared and verified through the use Delta-Z (DZ) orthos created using NV5's Las Product Creator. Absolute vertical accuracy of the calibrated data was assessed using ground survey data and complete coverage was again verified. dateTime: DateTime: 2023-10-06T00:00:00 processor: (CI_ResponsibleParty) organisationName: National Geodetic Survey role: (CI_RoleCode) processor processStep: (LI_ProcessStep) description: Post automated classification, NV5 then performed manual editing to review all classification and improve the final topobathymetric surface. NV5's LasMonkey was used to update LAS header information, including all projection and coordinate reference system information. The final lidar data are in LAS format 1.4 and point data record format 6. The final classification scheme is as follows: 1 - unclassified 2 - ground 7 Withheld -low noise 18 Withheld - high noise 40 - bathymetric bottom or submerged topography 41 - water surface 42 Synthetic- Chiroptera synthetic water surface 43 - submerged feature 45 - water column 64 - Submerged Aquatic Vegetation (SAV) 65 - overlap bathy bottom - temporally different from a separate lift 71 - unclassified associated with areas of overlap bathy bottom/temporal bathymetric differences 72 - ground associated with areas of overlap bathy bottom/temporal bathymetric differences 81 - water surface associated with areas of overlap bathy bottom/temporal bathymetric differences 82 Synthetic - Chiroptera synthetic water surface associated with areas of overlap bathy bottom/temporal bathymetric differences 85 - water column associated with areas of overlap bathy bottom/temporal bathymetric differences 1 Withheld - edge clip 1 Overlap Withheld - unrefracted green data from Chiroptera sensor dateTime: DateTime: 2023-10-06T00:00:00 processor: (CI_ResponsibleParty) organisationName: National Geodetic Survey role: (CI_RoleCode) processor processStep: (LI_ProcessStep) description: NV5 transformed the final lidar data from ellipsoid heights to orthometric heights referenced to NAVD88, Geoid 18 to create the final topobathymetric void clipped DEMs. The topobathymetric bare earth DEMs were output at 1 meter resolution in GeoTIFF format in 5000 m x 5000 m tiles. The NOAA Maine Topbathymetric Lidar raster models are clipped to the extent of the project boundary and named according to project specifications. A bathymetric void shapefile was created to indicate areas where there was a lack of bathymetric returns. This shape was created by triangulating bathymetric bottom points with an edge length maximum of 4.56m to identify all areas greater then 9 square meters without bathymetric returns. This shapefile was used to clip and exclude interpolated elevation data from these areas in the bathymetric void clipped topobathymetric bare earth model. dateTime: DateTime: 2024-09-13T00:00:00 processor: (CI_ResponsibleParty) organisationName: National Geodetic Survey role: (CI_RoleCode) processor source: (LI_Source) sourceCitation: (CI_Citation) title: Acquisition and Processing date: (missing) citedResponsibleParty: (CI_ResponsibleParty) organisationName: NV5 role: (CI_RoleCode) originator | |