| 2021 USACE NCMP Topobathy Lidar DEM: Alaska | referenceSystemInfo|
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| (MI_Metadata) fileIdentifier: gov.noaa.nmfs.inport:73829 language: LanguageCode: eng characterSet: (MD_CharacterSetCode) UTF8 hierarchyLevel: (MD_ScopeCode) dataset hierarchyLevelName: Elevation contact: (CI_ResponsibleParty) organisationName: OCM Partners 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: 2024-11-20T15:04:12 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::6333 return to top referenceSystemInfo: (MD_ReferenceSystem) referenceSystemIdentifier: (RS_Identifier) code: EPSG::6332 return to top referenceSystemInfo: (MD_ReferenceSystem) referenceSystemIdentifier: (RS_Identifier) code: EPSG::6334 return to top referenceSystemInfo: (MD_ReferenceSystem) referenceSystemIdentifier: (RS_Identifier) code: EPSG::6337 return to top referenceSystemInfo: (MD_ReferenceSystem) referenceSystemIdentifier: (RS_Identifier) code: EPSG::5703 return to top identificationInfo: (MD_DataIdentification) citation: (CI_Citation) title: 2021 USACE NCMP Topobathy Lidar DEM: Alaska date: (CI_Date) date: 2021 dateType: (CI_DateTypeCode) creation date: (CI_Date) date: 2024 dateType: (CI_DateTypeCode) publication identifier: (MD_Identifier) authority: (CI_Citation) title: NOAA/NMFS/EDM date: (inapplicable) code: Anchor: InPort Catalog ID 73829 citedResponsibleParty: (CI_ResponsibleParty) organisationName: (inapplicable) contactInfo: (CI_Contact) onlineResource: (CI_OnlineResource) linkage: https://www.fisheries.noaa.gov/inport/item/73829 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: (inapplicable) contactInfo: (CI_Contact) onlineResource: (CI_OnlineResource) linkage: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=9702/details/9702 protocol: WWW:LINK-1.0-http--link name: Custom Point Download description: Link to custom download, from the Data Access Viewer (DAV), the lidar point data from which these raster Digital Elevation Model (DEM) data were created. function: (CI_OnLineFunctionCode) download role: (inapplicable) citedResponsibleParty: (CI_ResponsibleParty) organisationName: (inapplicable) contactInfo: (CI_Contact) onlineResource: (CI_OnlineResource) linkage: https://coast.noaa.gov/dataviewer/ protocol: WWW:LINK-1.0-http--link name: NOAA's Office for Coastal Management (OCM) Data Access Viewer (DAV) description: The Data Access Viewer (DAV) allows a user to search for and download elevation, imagery, and land cover data for the coastal U.S. and its territories. The data, hosted by the NOAA Office for Coastal Management, can be customized and requested for free download through a checkout interface. An email provides a link to the customized data, while the original data set is available through a link within the viewer. function: (CI_OnLineFunctionCode) download role: (inapplicable) presentationForm: (unknown) abstract: Original Data: These files contain rasterized topobathy lidar elevations generated from data collected by the Coastal Zone Mapping and Imaging Lidar (CZMIL) system. CZMIL integrates a lidar sensor with simultaneous topographic and bathymetric capabilities, a digital camera and a hyperspectral imager on a single remote sensing platform for use in coastal mapping and charting activities. Native lidar data is not generally in a format accessible to most Geographic Information Systems (GIS). Specialized in-house and commercial software packages are used to process the native lidar data into 3-dimensional positions that can be imported into GIS software for visualization and further analysis. The original data's horizontal positions were provided in UTM Zones 2, 3, 4, 5, 7, and 8 referenced to the North American Datum of 1983 National Adjustment of 2011 (NAD83 (2011)). Vertical positions were in NAVD88 (Geoid12B) heights in meters. The 3-D position data are sub-divided into a series of LAS files, which are tiled into 1-km by 1-km boxes defined by the Military Grid Reference System. The following list indicates which blocks of data fall into each UTM Zone: 1. UTM Zone 2N - Blk 21215 Gambell, Blk 21216 Savoonga 2. UTM Zone 3N - Blk 21207 Point Lay, Blk 21208 Point Hope, Blk 21209 Point Hope, Blk 21210 Kivalina, Blk 21211 Cape Blossom, Blk 21212 Cape Blossom, Blk 21213 Shishmaref, Blk 21217 Nome, Blk 21218 Elim, Blk 21225 Cold Bay, Blk 21226 Cold Bay, Blk 21227 Akun 3. UTM Zone 4N - Blk 21204 Elson, Blk 21205 Utkiagvik, Blk 21206 Wainwright, Blk 21219 Shaktoolik, Blk 21228 Unalakleet 4. UTM Zone 5N - Blk 21220 Ninilchik, Blk 21221 Homer 5. UTM Zone 7N - Blk 21201 Kaktovik 6. UTM Zone 8N - Blk 21251 Gustavus, Blk 21252 Hoonah, Blk 21253 Tenakee, Blk 21254 Angoon, Blk 21255 Kake, Blk 21256 Petersburg, Blk 21257 Wrangell, Blk 21258 Whale Pass, Blk 21259 Coffman, Blk 21260 Nautaki, Blk 21261 Klawock, Blk 21262 Craig, Blk 21263 Thorne Bay, Blk 21264 Kasan, Blk 21265 Hydaburg The data were provided to the NOAA Office for Coastal Management (OCM) by the USACE Joint Airborne Lidar Bathymetry Technical Center of Expertise (JALBTCX) to make the data publicly available for bulk and custom downloads from the NOAA Digital Data Access Viewer (DAV). In addition to these bare earth Digital Elevation Model (DEM) data, the lidar point data that these DEM data were created from, are also available from the NOAA Digital Coast. A link to the lidar point data is provided in the URL section of this metadata record. DEMs at a 1 meter grid spacing, created from all classifications, are available by request at coastal.info@noaa.gov. purpose: This data was collected by the USACE in support of the National Coastal Mapping Program to assess changes in elevation above and below water along the coast of Alaska. credit: Acknowledgement of the Joint Airborne Lidar Bathymetry Technical Center of eXpertise (JALBTCX) would be appreciated in any publications or derived products. 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) pointOfContact 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 graphicOverview: (MD_BrowseGraphic) fileName: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9702/supplemental/usace2021_ak_m9702.kmz fileDescription: This graphic shows the lidar coverage for the 2021 topobathy lidar acquisition along the Alaskan coast. fileType: kmz descriptiveKeywords: (MD_Keywords) keyword: EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION keyword: EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION > DIGITAL ELEVATION/TERRAIN MODEL (DEM) 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 keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > ALASKA keyword: VERTICAL LOCATION > LAND SURFACE keyword: VERTICAL LOCATION > SEA FLOOR type: (MD_KeywordTypeCode) place thesaurusName: (CI_Citation) title: Global Change Master Directory (GCMD) Location Keywords date: (missing) edition: 17.0 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: Lidar - partner (no harvest) type: (MD_KeywordTypeCode) project thesaurusName: (CI_Citation) title: InPort date: (inapplicable) resourceConstraints: (MD_LegalConstraints) useConstraints: (MD_RestrictionCode) otherRestrictions otherConstraints: Cite As: OCM Partners, [Date of Access]: 2021 USACE NCMP Topobathy Lidar DEM: Alaska [Data Date Range], https://www.fisheries.noaa.gov/inport/item/73829. 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: These data depict the heights at the time of the survey and are only accurate for that time. Acknowledgement of the Joint Airborne Lidar Bathymetry Technical Center of eXpertise (JALBTCX) would be appreciated in any publications or derived products. The data herein, including but not limited to geographic data, tabular data, analytical data, electronic data structures or files, are provided "as is" without warranty of any kind, either expressed or implied, or statutory, including, but not limited to, the implied warranties or merchantability and fitness for a particular purpose. The entire risk as to the quality and performance of the data is assumed by the user. No guarantee of accuracy is granted, nor is any responsibility for reliance thereon assumed. In no event shall the U.S. Army Corps of Engineers, Mobile District Office, Spatial Data Branch be liable for direct, indirect, incidental, consequential or special damages of any kind, including, but not limited to, loss of anticipated profits or benefits arising out of use of or reliance on the data. The Spatial Data Branch does not accept liability for any damages or misrepresentation caused by inaccuracies in the data or as a result of changes to the data caused by system transfers or other transformations or conversions, nor is there responsibility assumed to maintain the data in any manner or form. These data have been developed from the best available sources. Although efforts have been made to ensure that the data are accurate and reliable, errors and variable conditions originating from physical sources used to develop the data may be reflected in the data supplied. Users must be aware of these conditions and bear responsibility for the appropriate use of the information with respect to possible errors, scale, resolution, rectification, positional accuracy, development methodology, time period, environmental and climatic conditions and other circumstances specific to these data. The user is responsible for understanding the accuracy limitations of the data provided herein. The burden for determining fitness for use lies entirely with the user. The user should refer to the accompanying metadata notes for a description of the data and data development procedures. 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 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: 2021 USACE NCMP Topobathy Lidar: Alaska date: (unknown) identifier: (MD_Identifier) authority: (CI_Citation) title: NOAA/NMFS/EDM date: (inapplicable) code: 73828 associationType: (DS_AssociationTypeCode) crossReference 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: 73829 citedResponsibleParty: (CI_ResponsibleParty) organisationName: (inapplicable) contactInfo: (CI_Contact) onlineResource: (CI_OnlineResource) linkage: https://www.fisheries.noaa.gov/inportserve/waf/noaa/nos/ocmp/dmp/pdf/73829.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 spatialRepresentationType: (MD_SpatialRepresentationTypeCode) grid language: eng; US topicCategory: (MD_TopicCategoryCode) elevation extent: (EX_Extent) geographicElement: (EX_GeographicBoundingBox) westBoundLongitude: -171.8 eastBoundLongitude: -132.3 southBoundLatitude: 47.350823 northBoundLatitude: 71.4 geographicElement: (EX_GeographicDescription) geographicIdentifier: (MD_Identifier) code: Small areas of collection along the Alaska coastline. temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21220 Ninilchik | Currentness: Ground Condition timePosition: 2021-05-30 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21204 Elson | Currentness: Ground Condition timePosition: 2021-08-20 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: First date of collection for Block 21209 Point Hope | Currentness: Ground Condition timePosition: 2021-08-03 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Last date of collection for Block 21209 Point Hope | Currentness: Ground Condition timePosition: 2021-08-19 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21210 Kivalina | Currentness: Ground Condition timePosition: 2021-06-27 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21215 Gambell | Currentness: Ground Condition timePosition: 2021-08-04 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21216 Savoonga | Currentness: Ground Condition timePosition: 2021-08-04 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21217 Nome | Currentness: Ground Condition timePosition: 2021-06-01 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21218 Elim | Currentness: Ground Condition timePosition: 2021-06-01 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21219 Shaktoolik | Currentness: Ground Condition timePosition: 2021-05-31 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21221 Homer | Currentness: Ground Condition timePosition: 2021-05-30 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21225 Cold Bay | Currentness: Ground Condition timePosition: 2021-06-04 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21226 Cold Bay | Currentness: Ground Condition timePosition: 2021-06-04 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21227 Akun | Currentness: Ground Condition timePosition: 2021-06-04 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21251 Gustavus | Currentness: Ground Condition timePosition: 2021-06-09 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21252 Hoonah | Currentness: Ground Condition timePosition: 2021-06-11 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21253 Tenakee | Currentness: Ground Condition timePosition: 2021-06-12 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21254 Angoon | Currentness: Ground Condition timePosition: 2021-06-11 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21261 Klawock | Currentness: Ground Condition timePosition: 2021-06-16 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21262 Craig | Currentness: Ground Condition timePosition: 2021-06-16 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21263 Thorne Bay | Currentness: Ground Condition timePosition: 2021-06-12 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21264 Kasaan | Currentness: Ground Condition timePosition: 2021-06-12 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21265 Hydaburg | Currentness: Ground Condition timePosition: 2021-06-16 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21205 Utkiagvik | Currentness: Ground Condition timePosition: 2021-08-20 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21206 Wainwright | Currentness: Ground Condition timePosition: 2021-08-20 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21207 Point Lay | Currentness: Ground Condition timePosition: 2021-08-19 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: First date of collection for Block 21208 Point Hope | Currentness: Ground Condition timePosition: 2021-08-03 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Last date of collection for Block 21208 Point Hope | Currentness: Ground Condition timePosition: 2021-08-19 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21211 Cape Blossom | Currentness: Ground Condition timePosition: 2021-06-22 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21212 Cape Blossom | Currentness: Ground Condition timePosition: 2021-06-22 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21213 Shishmaref | Currentness: Ground Condition timePosition: 2021-08-25 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21255 Kake | Currentness: Ground Condition timePosition: 2021-06-11 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21256 Petersburg | Currentness: Ground Condition timePosition: 2021-06-13 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21257 Wrangell | Currentness: Ground Condition timePosition: 2021-06-13 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21258 Whale Pass | Currentness: Ground Condition timePosition: 2021-06-13 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21259 Coffman | Currentness: Ground Condition timePosition: 2021-06-12 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21260 Naukati | Currentness: Ground Condition timePosition: 2021-06-14 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21201 Kaktovik | Currentness: Ground Condition timePosition: 2021-08-13 temporalElement: (EX_TemporalExtent) extent: TimeInstant: description: Date of collection for Block 21228 Unalakleet | Currentness: Ground Condition timePosition: 2021-06-01 return to top distributionInfo: (MD_Distribution) distributionFormat: (MD_Format) name: (inapplicable) version: (missing) fileDecompressionTechnique: Zip distributionFormat: (MD_Format) name: GeoTIFF version: (missing) 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=10207/details/10207 protocol: WWW:LINK-1.0-http--link name: Customized Download description: Create custom data files by choosing data area, map projection, file format, etc. A new metadata will be produced to reflect your request using this record as a base. function: (CI_OnLineFunctionCode) download transferOptions: (MD_DigitalTransferOptions) onLine: (CI_OnlineResource) linkage: https://noaa-nos-coastal-lidar-pds.s3.us-east-1.amazonaws.com/dem/USACE_Alaska_DEM_2021_10207/index.html protocol: WWW:LINK-1.0-http--link name: Bulk Download description: Bulk download of data files in the original coordinate system. function: (CI_OnLineFunctionCode) download return to top dataQualityInfo: (DQ_DataQuality) scope: (DQ_Scope) level: (MD_ScopeCode) dataset report: (DQ_QuantitativeAttributeAccuracy) nameOfMeasure: Accuracy evaluationMethodDescription: Every effort within operational constraints was made to acquire data that meets specifications as outline in this project's Statement of Work. Per flight block, elevations in areas of swath overlap are internally consistent and meet CZMIL specifications. Anomalous high and/or low elevation values have been removed, and point cloud classification algorithms have been validated via manual review and QC. Temporal differences in elevation exist in areas of active near shore processes from the dune to the depth of closure. JALBTCX conducts operations in a manner to ameliorate temporal differences, to include the collection of entire flight blocks within single missions. For a given flight block, it's adjacent flight blocks are captured within 3 days as weather and airspace permit. result: (missing) report: (DQ_AbsoluteExternalPositionalAccuracy) nameOfMeasure: Horizontal Positional Accuracy evaluationMethodDescription: CZMIL topographic data - Compiled to meet 1 m horizontal accuracy at 95% confidence level. CZMIL bathymetric data - Compiled to meet 3.5 + 0.05d m horizontal accuracy at 95% confidence level, d is depth. result: (missing) report: (DQ_AbsoluteExternalPositionalAccuracy) nameOfMeasure: Vertical Positional Accuracy evaluationMethodDescription: CZMIL topographic data - Compiled to meet 20 cm vertical accuracy at 95% confidence level (10 cm RMSE). CZMIL bathymetric shallow FOV data - Compiled to meet SQRT((0.25^2) +((0.0075d)^2)) m vertical accuracy at 95% confidence level, d is depth. CZMIL bathymetric deep FOV data - Compiled to meet SQRT((0.30^2) +((0.013d)^2)) m vertical accuracy at 95% confidence level, d is depth. result: (missing) report: (DQ_CompletenessCommission) nameOfMeasure: Completeness Measure evaluationMethodDescription: Planned data coverage for this dataset includes the shoreline along the coast of Alaska. Lidar and imagery data acquisition was focused on a 1500 meter swath of the shoreline that generally extends from the shoreline onshore 500 meters and from the shoreline offshore to 1000 meters or laser extinction, whichever occurs first. The planned point spacing is 70 centimeters on land and in shallow water. In deeper water the planned point spacing is 2 meters. Gaps or data holidays exist in the bathymetric portion of the data coverage due to a number of operational and environmental conditions, including by not limited to, active surf, low-reflectivity bottom substrate materials and turbidity in the water column. Please see the Report of Survey for additional details. Every effort within operational constraints was made to achieve the intended data coverage and planned point densities. result: (missing) lineage: (LI_Lineage) statement: CZMIL data is processed from raw lidar waveforms to point clouds using the CZMIL HydroFusion software package. Point clouds are then classified and edited in industry-standard software packages. Derivative data products are generated through the application of gridding and contouring algorithms in a GIS environment. The data processing workflow, including software packages, algorithms and parameters are provided in detail, herein this metadata as Process Steps. The NOAA Office for Coastal Management (OCM) received the data from the USACE Joint Airborne Lidar Bathymetry Technical Center of Expertise (JALBTCX). NOAA OCM processed the data to the NOAA Digital Coast Data Access Viewer (DAV) to make the data publicly available for bulk and custom downloads. processStep: (LI_ProcessStep) description: These data were collected using the CZMIL system. It is owned and operated by the U.S. Army Corps of Engineers (USACE). The system collects topobathy lidar data at 10 kHz and RGB imagery at 2 Hz. A CASI-1500 hyperspectral line scanner is integrated with the system as well. Aircraft position, velocity and acceleration information are collected through a combination of NovAtel and POS A/V 610 equipment. All raw data streams are transferred to the office for downloading and processing in CZMIL's HydroFusion software. Aircraft position data are processed using POSPac software and the results are combined with the lidar data to produce 3-D positions for each lidar shot. Upon inspection and QA/QC in the software packages Fledermaus and PFM_ABE, anomalous data are flagged as invalid and have the withheld bit set. dateTime: DateTime: 2021-08-20T00:00:00 processStep: (LI_ProcessStep) description: LAS files are imported into TerraScan V13 module within MicroStation V8i, classifies valid topobathy data as ground points (2) and unclassified points (1), and valid bathymetric points (29). Upon completion the macro, the classification results undergo quality control and any misclassified points are manually edited. In areas of dense vegetation the bare earth ground points might be incorrectly classified due to the inability of the laser to penetrate the canopy and reach the bare ground. In these areas, JALBTCX defaults to the algorithm's ground surface instead of manually reclassifying those points. They are partitioned into a series of 1-km delivery boxes, one Classified LAS file per box. The format of the file is LAS version 1.2. Data are classified as 1 (valid non-ground topographic data), 2 (valid ground topographic data), and 29 (valid bathymetric data). Vertical positions are also transformed from ellipsoid to orthometric heights referenced to the North American Vertical Datum of 1988 (NAVD88). dateTime: DateTime: 2024-01-08T00:00:00 processStep: (LI_ProcessStep) description: Data classified as ground points (2) and bathymetric points (29) in the las files are converted to a grid by generating a triangulated irregular network (TIN) and then extracting the grid node elevations from the TIN surface. The origin point of the grid is located at a horizontal position whose value is evenly divisible by the 1m grid resolution such that rasters from subsequent surveys have common cell boundaries. JALBTCX uses Quick Terrain Modeler V8.2.1 to perform this operation utilizing the following parameters; Legacy Triangulation, Max Sample Excursion - 500, Max Triangle Side 500, and Tiling Settings Snap to Grid (Expand). The grid is exported from Quick Terrain Modeler as a GeoTIFF 32-Bit DEM file. Utilizing an in-house python script within Jupyter Notebook, the null data values in the file are converted from -9999 to NoData with the Set Null tool from the ArcGIS Spatial Analyst Toolbox. The script also calls the Define Projection tool from the ArcGIS Data Management Toolbox to set the file's coordinate system information to The North American Datum of 1983 (2011). The raster is then multiplied against a corresponding 1m mask raster, an intermediate mask image produced from JALBTCX's 1mGrid data product, to remove interpolated areas where data does not exist. processStep: (LI_ProcessStep) description: The NOAA Office for Coastal Management (OCM) received a total of 1078 GeoTiff files for the coast of Alaska from USACE JALBTCX. The bare earth raster files were at a 1 m grid spacing. The data were in UTM Zones 2N, 3N, 4N, 5N, 7N and 8N NAD83 (2011), meters coordinates and NAVD88 elevations in meters. OCM assigned the appropriate EPSG codes (Horiz - 6331, 6332, 6333, 6334, 6336, 6337, Vert - 5703) and copied the raster files to https for Digital Coast storage and provisioning purposes. dateTime: DateTime: 2024-11-20T00:00:00 processor: (CI_ResponsibleParty) organisationName: Office for Coastal Management role: (CI_RoleCode) processor source: (LI_Source) sourceCitation: (CI_Citation) title: USACE JALBTCX date: (missing) citedResponsibleParty: (CI_ResponsibleParty) organisationName: USACE JALBTCX role: (CI_RoleCode) originator | |