| 2011 FEMA Risk Mapping, Assessment, and Planning (Risk MAP) Lidar: Nashua River Watershed (Massachusetts, New Hampshire) | spatialRepresentationInfo|
|---|---|
| (MI_Metadata) fileIdentifier: gov.noaa.nmfs.inport:49847 language: LanguageCode: eng characterSet: (MD_CharacterSetCode) UTF8 hierarchyLevel: (MD_ScopeCode) dataset 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: 2022-08-12T14:07:37 metadataStandardName: ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data metadataStandardVersion: ISO 19115-2:2009(E) return to top spatialRepresentationInfo: return to top referenceSystemInfo: return to top referenceSystemInfo: (MD_ReferenceSystem) referenceSystemIdentifier: (RS_Identifier) authority: (CI_Citation) title: NAD83(2011) date: (CI_Date) date: 2008-11-12 dateType: (CI_DateTypeCode) publication citedResponsibleParty: (CI_ResponsibleParty) organisationName: European Petroleum Survey Group contactInfo: (CI_Contact) onlineResource: (CI_OnlineResource) linkage: https://apps.epsg.org/api/v1/CoordRefSystem/6318/export/?format=gml role: (missing) code: urn:ogc:def:crs:EPSG:6318 version: 6.18.3 return to top referenceSystemInfo: (MD_ReferenceSystem) referenceSystemIdentifier: (RS_Identifier) authority: (CI_Citation) title: North American Vertical Datum of 1988 (NAVD88) (GEOID18) meters alternateTitle: North American Vertical Datum of 1988 (NAVD88) (GEOID18) meters citedResponsibleParty: (CI_ResponsibleParty) organisationName: (withheld) contactInfo: (CI_Contact) onlineResource: (CI_OnlineResource) linkage: https://apps.epsg.org/api/v1/VerticalCoordRefSystem/5703/?api_key=gml name: North American Vertical Datum of 1988 (NAVD88) (GEOID18) meters description: Link to Geographic Markup Language (GML) description of reference system. function: (CI_OnLineFunctionCode) information role: (CI_RoleCode) resourceProvider citedResponsibleParty: (CI_ResponsibleParty) organisationName: European Petroleum Survey Group contactInfo: (CI_Contact) onlineResource: (CI_OnlineResource) linkage: https://www.epsg.org/ name: European Petroleum Survey Group Geodetic Parameter Registry description: Registry that accesses the EPSG Geodetic Parameter Dataset, which is a structured dataset of Coordinate Reference Systems and Coordinate Transformations. function: (CI_OnLineFunctionCode) search role: (CI_RoleCode) publisher VerticalCS: metaDataProperty: CommonMetaData: type: vertical informationSource: OGP revisionDate: 2006-11-28 isDeprecated: false identifier: urn:ogc:def:cs:EPSG::6499 name: Vertical CS. Axis: height (H). Orientation: up. UoM: meter. remarks: Used in vertical coordinate reference systems. axis: CoordinateSystemAxis: descriptionReference: urn:ogc:def:axis-name:EPSG::9904 identifier: urn:ogc:def:axis:EPSG::114 axisAbbrev: H axisDirection: up code: urn:ogc:def:crs:EPSG::5703 return to top identificationInfo: (MD_DataIdentification) citation: (CI_Citation) title: 2011 FEMA Risk Mapping, Assessment, and Planning (Risk MAP) Lidar: Nashua River Watershed (Massachusetts, New Hampshire) alternateTitle: nh2011_nashua_river_m2513_metadata date: (CI_Date) date: 2013-07-18 dateType: (CI_DateTypeCode) publication identifier: (MD_Identifier) authority: (CI_Citation) title: NOAA/NMFS/EDM date: (inapplicable) code: Anchor: InPort Catalog ID 49847 citedResponsibleParty: (CI_ResponsibleParty) organisationName: (inapplicable) contactInfo: (CI_Contact) onlineResource: (CI_OnlineResource) linkage: https://www.fisheries.noaa.gov/inport/item/49847 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://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2513/supplemental/Nashua_River_HUC_8_01070004_Terrain_TSDN.pdf protocol: WWW:LINK-1.0-http--link name: Lidar Report description: Link to the lidar report. 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: Citation URL description: Online Resource function: (CI_OnLineFunctionCode) download role: (inapplicable) citedResponsibleParty: (CI_ResponsibleParty) organisationName: (inapplicable) contactInfo: (CI_Contact) onlineResource: (CI_OnlineResource) linkage: https://coast.noaa.gov protocol: WWW:LINK-1.0-http--link name: Citation URL description: Online Resource function: (CI_OnLineFunctionCode) download role: (inapplicable) presentationForm: (unknown) abstract: These data are the lidar points collected for FEMA Risk Mapping, Assessment, and Planning (Risk MAP) for the Nashua River Watershed. This area falls in portions of Hillsborough County in New Hampshire and portions of Middlesex and Worcester counties in Massachusetts. Using a Leica ALS60 LiDAR system, a total of 35 flight lines of high density (Nominal Pulse Spacing of 2.0 m) were collected over the Nashua area which encompasses 530.3 square miles. A total of 3 missions were flown on May 6, 2011 and May 7, 2011. One airborne global positioning system (GPS) base station was used to support the LiDAR data acquisition: FIT B. The data were received by the NOAA Office for Coastal Management from NH GRANIT. For data storage and Digital Coast provisioning purposes the data were: 1. Converted from UTM Zone 19, meters, NAD83 to geographic coordinates. 2. Converted from NAVD88 (Geoid09), meters to ellipsoid heights, using Geoid09 3. Converted overlap points that were classified as 11 to class 12 (Overlap). Data available for download from the Digital Coast include the following classifications: 1. 1 (Unclassified) 2. 2 (Ground) 3. 7 (Low Point Noise) 4. 9 (Model Key Points) 5. 12 (Overlap) Original contact information: Contact Org: NH GRANIT Phone: 603-862-1792 Email: granit@unh.edu This data set is an LAZ (compressed LAS) format file containing LIDAR point cloud data. purpose: Provide high resolution terrain elevation and land cover elevation data. Terrain data is used to represent the topography of a watershed and/or floodplain environment and to extract useful information for hydraulic and hydrologic models. credit: Acknowledgement of FEMA would be appreciated in products derived from these data. This digital data is produced for the purposes of updating/creating a DFIRM database. Ground control and quality control checkpoints were collected by CompassData, Inc. LiDAR was acquired and processed by Photo Science, Inc. Quality Control testing was performed by CompassData, Inc. Quality Assurance testing was conducted by Greenhorne & O'Mara, Inc. All firms were under contract to STARR, A Joint Venture which held the FEMA contract and task order for this work. The custom download may be cited as National Oceanic and Atmospheric Administration (NOAA) Digital Coast Data Access Viewer. Charleston, SC: NOAA Office for Coastal Management. Accessed Jul 01, 2023 at https://coast.noaa.gov/dataviewer. 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 resourceMaintenance: (MD_MaintenanceInformation) maintenanceAndUpdateFrequency: (MD_MaintenanceFrequencyCode) unknown descriptiveKeywords: (MD_Keywords) keyword: Bare Earth keyword: Ground Control keyword: Land Surface keyword: Point Cloud type: (MD_KeywordTypeCode) theme 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]: 2011 FEMA Risk Mapping, Assessment, and Planning (Risk MAP) Lidar: Nashua River Watershed (Massachusetts, New Hampshire) [Data Date Range], https://www.fisheries.noaa.gov/inport/item/49847. 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 useConstraints: (MD_RestrictionCode) otherRestrictions otherConstraints: 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 represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. | Distribution Liability: No warranty expressed or implied is made by FEMA regarding the utility of the data on any other system nor shall the act of distribution constitute any such warranty. Any conclusions drawn from the analysis of this information are not the responsibility of FEMA, NH GRANIT, the NOAA 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: 49847 citedResponsibleParty: (CI_ResponsibleParty) organisationName: (inapplicable) contactInfo: (CI_Contact) onlineResource: (CI_OnlineResource) linkage: https://www.fisheries.noaa.gov/inportserve/waf/noaa/nos/ocmp/dmp/pdf/49847.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) vector language: eng; US topicCategory: (MD_TopicCategoryCode) elevation extent: (EX_Extent) geographicElement: (EX_GeographicBoundingBox) westBoundLongitude: -71.987399 eastBoundLongitude: -71.425869 southBoundLatitude: 42.315652 northBoundLatitude: 42.820656 temporalElement: (EX_TemporalExtent) extent: TimePeriod: description: | Currentness: Ground Condition beginPosition: 2011-05-06 endPosition: 2011-05-07 supplementalInformation: The FEMA Nashua River HUC 8 LiDAR FY2010 report may be accessed at: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2513/supplemental/Nashua_River_HUC_8_01070004_Terrain_TSDN.pdf A footprint of this data may be viewed in Google Earth at: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2513/supplemental/2011_FEMA_Nashua_River_Watershed_Lidar.kmz return to top contentInfo: (MD_FeatureCatalogueDescription) complianceCode: false language: LanguageCode: eng includedWithDataset: false featureCatalogueCitation: https://www.fisheries.noaa.gov/inport/item/50234 (CI_Citation) title: Terrain\2142865\SupplementalData\GroundControl Nashua date: (CI_Date) date: 2022-03-16 dateType: (CI_DateTypeCode) publication featureCatalogueCitation: https://www.fisheries.noaa.gov/inport/item/50235 (CI_Citation) title: Terrain\2142867\Bare_Earth date: (CI_Date) date: 2022-03-16 dateType: (CI_DateTypeCode) publication featureCatalogueCitation: https://www.fisheries.noaa.gov/inport/item/50236 (CI_Citation) title: Terrain\2142865\SupplementalData\FVA_CVA Nashua date: (CI_Date) date: 2022-03-16 dateType: (CI_DateTypeCode) publication featureCatalogueCitation: https://www.fisheries.noaa.gov/inport/item/50237 (CI_Citation) title: Terrain\2142866\SupplementalData\Nashua_Collection_Area date: (CI_Date) date: 2022-03-16 dateType: (CI_DateTypeCode) publication featureCatalogueCitation: https://www.fisheries.noaa.gov/inport/item/50238 (CI_Citation) title: Terrain\2142866\All_Returns date: (CI_Date) date: 2022-03-16 dateType: (CI_DateTypeCode) publication featureCatalogueCitation: https://www.fisheries.noaa.gov/inport/item/50239 (CI_Citation) title: Terrain\2142866\SupplementalData\Nashua_PreFlight Report date: (CI_Date) date: 2017-11-15 dateType: (CI_DateTypeCode) publication featureCatalogueCitation: https://www.fisheries.noaa.gov/inport/item/50240 (CI_Citation) title: Terrain\2142866\SupplementalData\Nashua_PostFlight Report date: (CI_Date) date: 2017-11-15 dateType: (CI_DateTypeCode) publication featureCatalogueCitation: https://www.fisheries.noaa.gov/inport/item/50241 (CI_Citation) title: Terrain\2142866\SupplementalData\Nashua_Tile_Index date: (CI_Date) date: 2017-11-15 dateType: (CI_DateTypeCode) publication featureCatalogueCitation: https://www.fisheries.noaa.gov/inport/item/50242 (CI_Citation) title: Terrain\2142867\SupplementalData\Region 1 Nashua Testing Results FVA CVA date: (CI_Date) date: 2017-11-15 dateType: (CI_DateTypeCode) publication featureCatalogueCitation: https://www.fisheries.noaa.gov/inport/item/50243 (CI_Citation) title: Terrain\2142867\SupplementalData\R1_Nashua_Terrain_TSDN date: (CI_Date) date: 2017-11-15 dateType: (CI_DateTypeCode) publication return to top distributionInfo: (MD_Distribution) 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=2513 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/geoid18/2513/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_AbsoluteExternalPositionalAccuracy) nameOfMeasure: Vertical Positional Accuracy evaluationMethodDescription: Deliverables were tested by for both vertical and horizontal accuracy. The vertical unit of the data file is in meters with 2-decimal point precision. Consolidated Vertical Accuracy (CVA) tested 18.5 cm at 95th percentile in: open terrain, forest terrain, and urban terrain. The Root Mean Square Error (RMSE) for the elevation differences between GPS control points and lidar points is 9.4 cm calculated with 20 supplemental vertical accuracy (SVA) points. Fundamental Vertical Accuracy (FVA) tested 17.2 cm at 95 percent confidence level in open terrain using RMSEz x 1.9600. The Root Mean Square Error (RMSE) for the elevation differences between GPS control points and lidar points is 8.8 cm calculated with 20 FVA points. The Region_1_Nashua_Testing_Results_FVA_CVA.pdf may be accessed at: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2513/supplemental/Region_1_Nashua_Testing_Results_FVA_CVA.pdf ; Quantitative Value: 0.088 meters, Test that produced the value: The Root Mean Square Error (RMSE) for the elevation differences between GPS control points and lidar points in open terrain is 8.8 cm calculated with 20 Fundamental Vertical Accuracy (FVA) points. result: (missing) report: (DQ_CompletenessCommission) nameOfMeasure: Completeness Report evaluationMethodDescription: Survey data have been checked for completeness; points have been collected in correct vegetation units, and distributed throughout the AOI. The terrain data have been checked for completeness against AOI polygons. No gaps as defined by FEMA Procedural Memo No. 61 are known to exist within the dataset. result: (missing) report: (DQ_ConceptualConsistency) nameOfMeasure: Conceptual Consistency evaluationMethodDescription: Survey data have been confirmed to be in proper units, coordinate systems and format. The terrain data have been confirmed as complete LAS format data files. Header files are in proper LAS format with content as specified by FEMA Procedural Memo No. 61. result: (missing) lineage: (LI_Lineage) statement: (missing) processStep: (LI_ProcessStep) description: GPS based surveys were utilized to support both processing and testing of LiDAR data within FEMA designated Areas of Interest (AOIs). Geographically distinct ground points were surveyed using GPS technology throughout the AOIs to provide support for three distinct tasks. Task 1 was to provide Vertical Ground Control to support the aerial acquisition and subsequent bare earth model processing. To accomplish this, survey-grade Trimble R-8 GPS receivers were used to collect a series of control points located on open areas, free of excessive or significant slope, and at least 5 meters away from any significant terrain break. Most if not all control points were collected at street/road intersections on bare level pavement. Task 2 was to collect Fundamental Vertical Accuracy (FVA) checkpoints to evaluate the initial quality of the collected point cloud and to ensure that the collected data was satisfactory for further processing to meet FEMA specifications. The FVA points were collected in identical fashion to the Vertical Ground Control Points, but segregated from the point pool to ensure independent quality testing without prior knowledge of FVA locations by the aerial vendor. Task 3 was to collect Consolidated Vertical Accuracy (CVA) checkpoints to allow vertical testing of the bare-earth processed LiDAR data in different classes of land cover, including: Open (pavement, open dirt, short grass), High Grass and Crops, Brush and Low Trees, Forest, Urban. CVA points were collected in similar fashion as Control and FVA points with emphasis on establishing point locations within the predominant land cover classes within each AOI or Functional AOI Group. In order to successfully collect the Forest land cover class, it was necessary to establish a backsight and Initial Point with the R8 receiver, and then employ a Nikon Total Station to observe a retro reflective prism stationed under tree canopy. This was necessary due to the reduced GPS performance and degradation of signal under tree canopy. The R-8 receivers were equipped with cellular modems to receive real-time correction signals from the Keystone Precision Virtual Reference Station (VRS) network encompassing the Region 1 AOIs. Use of the VRS network allowed rapid collection times (~3 minutes/point) at 2.54 cm (1 inch) initial accuracy. All points collected were below the 16.5cm specification for testing 49cm, High category LiDAR data. To ensure valid in-field collections, an NGS monument with suitable vertical reporting was measured using the same equipment and procedures used for Control, FVA and CVA points on a daily basis. The measurement was compared to the NGS published values to ensure that the GPS collection schema was producing valid data and as a physical proof point of quality of collection. Those monument measurements are summarized in the Accuracy report included in the data delivered to FEMA. dateTime: DateTime: 2011-01-01T00:00:00 processStep: (LI_ProcessStep) description: In order to meet FEMA budgetary requirements, AOIs were consolidated into Functional Groups: if AOIs were contiguous, they were treated as one large AOI to allow collection of 20 FVA points and 15 additional CVA points across the group of AOIs. 20 FVA points are necessary to allow testing to CE95 - 1 point out of 20 may fail vertical testing and still allow the entire dataset to meet 95% accuracy requirements. In similar fashion, 20 CVA points are necessary to test to CE95 as discussed above. 15 CVA points were collected per AOI or per Functional Group with the intention at the outset that 5 of the collected FVAs would perform double -duty as Open-class CVA points, to total 20 CVAs per AOI or Functional Group. The Functional Groups are as follows: Narragansett/Charles/Blackstone (northeast), Nashua, Blackstone (north and west), Quinnipiac, Quincy/Suffolk (while included as part of the FEMA Charles AOI, was physically separated from the Charles AOI polygon and treated as an independent functional area). The following software packages and utilities were used to control the GPS receiver in the field during data collection, and then ingest and export the collected GPS data for all points: Trimble Survey Controller, Trimble Pathfinder Office. The following software utilities were used to translate the collected Latitude/Longitude Decimal Degree HAE GPS data for all points into Latitude/Longitude Degrees/Minutes/Seconds for checking the collected monument data against the published NGS Datasheet Lat/Long DMS values and into UTM NAD83 Northings/Eastings: U.S. Army Corps of Engineers CorpsCon, National Geodetic Survey Geoid09NAVD88. MSL values were determined using the most recent NGS-approved geoid model to generate geoid separation values for each Lat/Long coordinate pair. In this fashion, Orthometric heights were determined for each Control, FVA and CVA point by subtracting the generated Geoid Separation value from the Ellipsoidal Height (HAE) for publication and use as MSL NAVD88(09). dateTime: DateTime: 2011-01-01T00:00:00 processStep: (LI_ProcessStep) description: Using a Leica ALS60 LiDAR system, 35 flight lines of high density (Nominal Pulse Spacing of 2.0 m) were collected over the Nashua area which encompasses 530.3 square miles. A total of 3 missions were flown on May 6, 2011 and May 7, 2011. One airborne global positioning system (GPS) base station was used to support the LiDAR data acquisition: FIT B. Additional information can be found in the Post-Flight Aerial Acquisition Report. dateTime: DateTime: 2011-01-01T00:00:00 processStep: (LI_ProcessStep) description: Leica proprietary software was used in the post-processing of the airborne GPS and inertial data that is critical to the positioning and orientation of the sensor during all flights. Pairing the aircraft raw trajectory data with the stationary GPS base station data, this software yields the Leica IPAS TC (Inertial Positioning & Attitude Sensor - Tightly Coupled) smoothed best estimate of trajectory (an SBET, in the Leica .sol file format) that is necessary for the Leica ALSPP post processing software to develop the resulting geo-referenced point cloud from the LiDAR missions. The point cloud is the mathematical three dimensional composite of all returns from all laser pulses as determined from the aerial mission. At this point this data is ready for analysis, classification, and filtering to generate a bare earth surface model in which the above-ground features are removed from the data set. The point cloud was created using Leica Post Processor software. GeoCue was used in the creation of some of the files needed in downstream processing, as well as in the tiling of the dataset into more manageable file sizes. The TerraScan and TerraModeler software packages are then used for the automated data classification, manual cleanup, and bare earth generation from this data. Project specific macros were used to classify the ground and to remove the side overlap between parallel flight lines. All data were manually reviewed and any remaining artifacts removed using functionality provided by TerraScan and TerraModeler. QT Modeler was used as a final check of the bare earth dataset. GeoCue was then used to create the deliverable industry-standard LAS files for both the All Point Cloud Data and the Bare Earth. In-house software was then used to perform final statistical analysis of the classes in the LAS files. dateTime: DateTime: 2011-01-01T00:00:00 processStep: (LI_ProcessStep) description: Point Cloud data is manually reviewed and any remaining artifacts are removed using functionality provided within the TerraScan and TerraModeler software packages. Additional project specific macros are created and run within GeoCue/TerraScan to ensure correct LAS classification prior to project delivery. Final Classified LAS tiles are created within GeoCue to confirm correct LAS versioning and header information. In-house software is then used to check LAS header information and final LAS classification prior to delivery. LAS Class 2 is used to check the independent QC points against the Triangulated LiDAR surface. dateTime: DateTime: 2011-01-01T00:00:00 processStep: (LI_ProcessStep) description: The NOAA Office for Coastal Management received elevation and intensity data las files in LAS v1.2 format. The data were in UTM Zone 19, meters, NAD83 coordinates and were vertically referenced to NAVD88 (Geoid09). The vertical units of the data were meters. OCM performed the following processing for data storage and Digital Coast provisioning purposes: 1. Data were filtered for outliers using the lastools tool, las2las 2. Data points that were overlap points, but were classified as 11, were converted to class 12 (overlap), using the lastools tool, las2las 3. Data were converted from UTM Zone 19, meters, NAD83 to geographic coordinates. 4. Data were converted from NAVD88 (Geoid09) elevations, to ellipsoid elevations using Geoid09 5. Data were zipped to laz format dateTime: DateTime: 2013-07-01T00:00:00 source: (LI_Source) description: Source Contribution: Point Cloud (All Returns) LAS point files named according to Nashua Tile Index. | Type of Source Media: DIGITAL sourceCitation: (CI_Citation) title: All_Returns date: (CI_Date) date: 2011-01-01 dateType: (CI_DateTypeCode) publication sourceExtent: (EX_Extent) temporalElement: (EX_TemporalExtent) extent: TimeInstant: timePosition: 2011-07-15 source: (LI_Source) description: Source Contribution: Bare Earth LAS point files named according to the Nashua_Tile_Index. | Type of Source Media: DIGITAL sourceCitation: (CI_Citation) title: Bare_Earth date: (CI_Date) date: 2011-01-01 dateType: (CI_DateTypeCode) publication sourceExtent: (EX_Extent) temporalElement: (EX_TemporalExtent) extent: TimeInstant: timePosition: 2011-07-15 source: (LI_Source) description: Source Contribution: Quality Assurance points to confirm LiDAR data meets vertical accuracy requirements. | Type of Source Media: DIGITAL sourceCitation: (CI_Citation) title: FVA_CVA Nashua date: (CI_Date) date: 2011-01-01 dateType: (CI_DateTypeCode) publication sourceExtent: (EX_Extent) temporalElement: (EX_TemporalExtent) extent: TimeInstant: timePosition: 2011-01-28 source: (LI_Source) description: Source Contribution: Control points for tying LiDAR data to the ground surface. | Type of Source Media: DIGITAL sourceCitation: (CI_Citation) title: Ground_Control Nashua date: (CI_Date) date: 2011-01-01 dateType: (CI_DateTypeCode) publication sourceExtent: (EX_Extent) temporalElement: (EX_TemporalExtent) extent: TimeInstant: timePosition: 2011-01-28 source: (LI_Source) description: Source Contribution: Shapefile of Nashua LiDAR acquisition area. | Type of Source Media: DIGITAL sourceCitation: (CI_Citation) title: Nashua_Collection_Area date: (CI_Date) date: 2011-01-01 dateType: (CI_DateTypeCode) publication sourceExtent: (EX_Extent) temporalElement: (EX_TemporalExtent) extent: TimeInstant: timePosition: 2011-07-15 source: (LI_Source) description: Source Contribution: Document contains the acquisition and calibration report for the LiDAR acquisition | Type of Source Media: DIGITAL sourceCitation: (CI_Citation) title: Nashua_PostFlightReport date: (CI_Date) date: 2011-01-01 dateType: (CI_DateTypeCode) publication sourceExtent: (EX_Extent) temporalElement: (EX_TemporalExtent) extent: TimeInstant: timePosition: 2011-07-15 source: (LI_Source) description: Source Contribution: Document contains the operations plans for the LiDAR acquisition. | Type of Source Media: DIGITAL sourceCitation: (CI_Citation) title: Nashua_PreFlightReport date: (CI_Date) date: 2011-01-01 dateType: (CI_DateTypeCode) publication sourceExtent: (EX_Extent) temporalElement: (EX_TemporalExtent) extent: TimeInstant: timePosition: 2011-07-15 source: (LI_Source) description: Source Contribution: Shapefile of tile index used to populate and reference the LAS tiled data. | Type of Source Media: DIGITAL sourceCitation: (CI_Citation) title: Nashua_Tile_Index date: (CI_Date) date: 2011-01-01 dateType: (CI_DateTypeCode) publication sourceExtent: (EX_Extent) temporalElement: (EX_TemporalExtent) extent: TimeInstant: timePosition: 2011-07-15 source: (LI_Source) description: Source Contribution: Contains complete narrative on the acquisition and processing of the LiDAR dataset, includes area diagrams, reports and metadata. | Type of Source Media: DIGITAL sourceCitation: (CI_Citation) title: R1_Nashua_Terrain_TSDN date: (CI_Date) date: 2011-01-01 dateType: (CI_DateTypeCode) publication sourceExtent: (EX_Extent) temporalElement: (EX_TemporalExtent) extent: TimeInstant: timePosition: 2011-07-15 source: (LI_Source) description: Source Contribution: Document contains QC test results for both FVA and CVA blind check point tests against open area and bare earth surfaces generated from All Returns and Bare Earth (respectively) LAS points. | Type of Source Media: DIGITAL sourceCitation: (CI_Citation) title: Region 1 Nashua Testing Results FVA CVA date: (CI_Date) date: 2011-01-01 dateType: (CI_DateTypeCode) publication sourceExtent: (EX_Extent) temporalElement: (EX_TemporalExtent) extent: TimeInstant: timePosition: 2011-07-15 processStep: (LI_ProcessStep) description: The vertical values in this data set have been converted to reference North American Vertical Datum of 1988 (NAVD88) (GEOID18) meters, using the GEOID18 grids provided by the National Geodetic Survey. Any datum and projection transformations were then done with the Office for Coastal Management 'datum_shift' program. Compression to an LAZ file was done with the LAStools 'laszip' program and can be unzipped with the same free program (laszip.org) Processing notes: dateTime: DateTime: 2023-07-01T06:09:34 processor: (CI_ResponsibleParty) individualName: NOAA Office for Coastal Management contactInfo: (CI_Contact) address: (CI_Address) electronicMailAddress: coastal.info@noaa.gov role: (CI_RoleCode) processor | |