Southern Louisiana 1/3 arc-second NAVD 88 Coastal Digital Elevation Model
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title: Southern Louisiana 1/3 arc-second NAVD 88 Coastal Digital Elevation Model
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date: 2012-01-28
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name: NOAA Tsunami Inundation DEMs
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abstract: Modeling and mapping of coastal processes (e.g. tsunamis, hurricane storm-surge, and sea-level rise) requires digital representations of Earth's solid surface, referred to as digital elevation models (DEMs). Some modeling utilizes structured, square-cell DEMs, while others utilize unstructured grids that have no regular cell size or pattern. Usually, these different DEM types are developed independently, even though they are built from the same source bathymetric and topographic datasets. The National Geophysical Data Center (NGDC), an office of the National Oceanic and Atmospheric Administration (NOAA), has developed two bathymetric-topographic square-celled DEMs and one bathymetric-topographic unstructured DEM of southern Louisiana. The DEMs were developed for the Hurricane Forecast Improvement Project (HFIP), with the purpose of developing a new methodology for unstructured grid production from structured square-celled grids. The 1/3 arc-second DEM referenced to North American Vertical Datum of 1988 (NAVD 88) was carefully developed and evaluated. A NAVD 88 to mean high water (MHW) 1/3 arc-second conversion grid derived from VDatum project areas was created to model the relationship between NAVD 88 and MHW in the southern Louisiana region. NGDC combined the NAVD 88 DEM and the conversion grid to develop a 1/3 arc-second MHW DEM. The NAVD 88 DEM was generated from diverse digital datasets in the region. The DEMs were developed to be used for storm surge inundation and sea level rise modeling. The source bathymetric and topographic datasets used in the development of the NAVD 88 DEM were utilized along with the NAVD 88 DEM and derivative grids to develop the NAVD 88 unstructured DEM.
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keyword: Earth Science > Land Surface > Topography > Terrain Elevation
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keyword: Continent > North America > United States of America > Louisiana
keyword: Ocean > Atlantic Ocean > North Atlantic Ocean > Gulf of Mexico
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useLimitation: Not to be used for navigation. Although these data are of high quality and useful for planning and modeling purposes, they are not suitable for navigation. For navigation, please refer to the NOS nautical chart series.
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abstract: A map service showing the location and coverage of land and seafloor digital elevation models (DEMs) available from NOAA's National Centers for Environmental Information (NCEI). NCEI builds and distributes high-resolution, coastal digital elevation models (DEMs) that integrate ocean bathymetry and land topography to support NOAA's mission to understand and predict changes in Earth's environment, and conserve and manage coastal and marine resources to meet our Nation's economic, social, and environmental needs. They can be used for modeling of coastal processes (tsunami inundation, storm surge, sea-level rise, contaminant dispersal, etc.), ecosystems management and habitat research, coastal and marine spatial planning, and hazard mitigation and community preparedness. Layers available in the map service: Layers 1-4: DEMs by Category (includes various DEMs, both hosted at NCEI, and elsewhere on the web); Layers 6-11: NCEI DEM Projects (DEMs hosted at NCEI, color-coded by project); Layer 12: All NCEI Bathymetry DEMs (All bathymetry or bathy-topo DEMs hosted at NCEI).
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title: Digital Elevation Models: Color Shaded Relief ArcGIS Image Service
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abstract: This is an ArcGIS image service showing color shaded relief visualizations of high-resolution digital elevation models (DEMs) of U.S. coastal regions. NOAA's National Geophysical Data Center (NGDC) builds and distributes high-resolution coastal digital elevation models (DEMs) that integrate ocean bathymetry and land topography to support NOAA's mission to understand and predict changes in Earth's environment, and conserve and manage coastal and marine resources to meet our Nation's economic, social, and environmental needs. They can be used for modeling of coastal processes (tsunami inundation, storm surge, sea-level rise, contaminant dispersal, etc.), ecosystems management and habitat research, coastal and marine spatial planning, and hazard mitigation and community preparedness. DEMs included in this visualization: High-resolution DEMs of select U.S. coastal communities and surrounding areas. Most are at a resolution of 1/3 to 1 arc-second (approx 10-30 m); U.S. Coastal Relief Model: A 3 arc-second (approx 90 m) comprehensive view of the conterminous U.S. coastal zone, Puerto Rico, and Hawaii; Southern Alaska Coastal Relief Model: A 24 arc-second (approx. 500 m) model of Southern Alaska, spanning the Bering Sea, Aleutian Islands, and Gulf of Alaska. This map service can be used as a basemap. It has a transparent background, so it can also be shown as a layer on top of a different basemap. Please see NGDC's corresponding DEM Footprints map service for polygon footprints and more information about the individual DEMs used to create this composite view.
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westBoundLongitude: -180
eastBoundLongitude: 180
southBoundLatitude: -90
northBoundLatitude: 90
couplingType: (SV_CouplingType) tight
containsOperations: (SV_OperationMetadata)
operationName: ArcGIS for Server REST endpoint for image service
DCP: (unknown)
connectPoint: (CI_OnlineResource)
linkage: https://gis.ngdc.noaa.gov/arcgis/rest/services/DEM_mosaics/DEM_global_mosaic_hillshade/ImageServer
protocol: ESRI:ArcGIS
applicationProfile: ArcGIS Map Service
name: Digital Elevation Models Global Mosaic (Color Shaded Relief) ArcGIS Image Service
description: REST endpoint for Digital Elevation Models Global Mosaic (Color Shaded Relief) ArcGIS image service
function: (CI_OnLineFunctionCode) search
containsOperations: (SV_OperationMetadata)
operationName: WMS Get Capabilities
DCP:
connectPoint: (CI_OnlineResource)
linkage: https://gis.ngdc.noaa.gov/arcgis/rest/services/DEM_mosaics/DEM_global_mosaic_hillshade/ImageServer/WMSServer?request=GetCapabilities&service=WMS
protocol: OGC:WMS
applicationProfile: Open Geospatial Consortium Web Map Service (WMS)
name: Digital Elevation Models Global Mosaic (Color Shaded Relief) Web Map Service (WMS)
description: Capabilities document for Open Geospatial Consortium Web Map Service for Digital Elevation Models Global Mosaic (Color Shaded Relief)
function: (CI_OnLineFunctionCode) search
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distributionInfo: (MD_Distribution)
distributionFormat: (MD_Format)
name: netCDF
version: 4 Classic
distributor: (MD_Distributor)
distributorContact: (CI_ResponsibleParty)
organisationName: NOAA National Centers for Environmental Information
positionName: DEM Information
contactInfo: (CI_Contact)
address: (CI_Address)
electronicMailAddress: dem.info@noaa.gov
role: (CI_RoleCode) pointOfContact
transferOptions: (MD_DigitalTransferOptions)
onLine: (CI_OnlineResource)
linkage: https://www.ngdc.noaa.gov/mgg/coastal
protocol: HTTPS
name: DEM text search
description: Text search for locating completed and planned DEMs.
function: (CI_OnLineFunctionCode) search
transferOptions: (MD_DigitalTransferOptions)
onLine: (CI_OnlineResource)
linkage: https://www.ncei.noaa.gov/maps/bathymetry/
protocol: HTTPS
name: Bathymetric Data Viewer
description: The Bathymetric Data Viewer is an interactive map providing discovery, descriptions, and download capability for bathymetric survey data and digital elevation models archived at NOAA's National Centers for Environmental Information (NCEI).
function: (CI_OnLineFunctionCode) search
transferOptions: (MD_DigitalTransferOptions)
onLine: (CI_OnlineResource)
linkage: https://www.ngdc.noaa.gov/thredds/dodsC/regional/southern_louisiana_13_navd88_2010.nc.html
protocol: OPeNDAP:OPeNDAP
name: OPeNDAP Dataset Access Form
description: OPeNDAP Dataset Access Form
function: (CI_OnLineFunctionCode) download
transferOptions: (MD_DigitalTransferOptions)
onLine: (CI_OnlineResource)
linkage: https://www.ngdc.noaa.gov/thredds/fileServer/regional/southern_louisiana_13_navd88_2010.nc
protocol: HTTPS
name: Download NetCDF File
description: Download NetCDF File
function: (CI_OnLineFunctionCode) download
transferOptions: (MD_DigitalTransferOptions)
onLine: (CI_OnlineResource)
linkage: https://www.ngdc.noaa.gov/thredds/wcs/regional/southern_louisiana_13_navd88_2010.nc?service=WCS&version=1.0.0&request=GetCapabilities
protocol: OGC:WCS
name: Web Coverage Service GetCapabilities
description: Web Coverage Service GetCapabilities
function: (CI_OnLineFunctionCode) information
transferOptions: (MD_DigitalTransferOptions)
onLine: (CI_OnlineResource)
linkage: https://www.ngdc.noaa.gov/thredds/wms/regional/southern_louisiana_13_navd88_2010.nc?service=WMS&version=1.3.0&request=GetCapabilities
protocol: OGC:WMS
name: Web Map Service GetCapabilities
description: Web Map Service GetCapabilities
function: (CI_OnLineFunctionCode) information
transferOptions: (MD_DigitalTransferOptions)
onLine: (CI_OnlineResource)
linkage: https://www.ngdc.noaa.gov/thredds/ncss/regional/southern_louisiana_13_navd88_2010.nc/dataset.html
protocol: HTTPS
name: Download a subset of the NetCDF
description: Download a subset of the NetCDF
function: (CI_OnLineFunctionCode) download
transferOptions: (MD_DigitalTransferOptions)
onLine: (CI_OnlineResource)
linkage: https://www.ngdc.noaa.gov/thredds/ncml/regional/southern_louisiana_13_navd88_2010.nc?catalog=https%3A%2F%2Fwww.ngdc.noaa.gov%2Fthredds%2Fcatalog%2Fregional%2Fcatalog.html&dataset=regionalDatasetScan%2Fsouthern_louisiana_13_navd88_2010.nc
protocol: HTTPS
name: NetCDF Markup Language file
description: NetCDF Markup Language file
function: (CI_OnLineFunctionCode) information
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dataQualityInfo: (DQ_DataQuality)
scope: (DQ_Scope)
level: (MD_ScopeCode) repository
levelDescription: (MD_ScopeDescription)
other: NOAA National Centers for Environmental Information
lineage: (LI_Lineage)
processStep: (LE_ProcessStep)
description: NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
dateTime:
DateTime: 2015-04-22T00:00:00
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dataQualityInfo: (DQ_DataQuality)
scope: (DQ_Scope)
level: (MD_ScopeCode) dataset
report: (DQ_AbsoluteExternalPositionalAccuracy)
nameOfMeasure: Horizontal Positional Accuracy Report
evaluationMethodDescription: The horizontal accuracy of bathymetric and topographic features in the DEM is dependent upon the accuracy of the input datasets used to determine corresponding cell values. Topography: 10 meters due to cell size. Lidar: less than 5 meters. DEM cell-value relative-contribution factors: Louisiana Lidar, CSC Lidar: 100, Digitzed features: 1, Bathymetry: 5 to several tens of meters. Positional accuracy of input bathymetric datasets limits accuracy of corresponding cell values in DEM. CSC Lidar: 0.75 meters. Early 20th-century NOS hydrographic soundings are limited by sparseness of deep-water soundings, and potentially large position accuracy of pre-satellite (i.e., GPS) navigation: tens to several tens of meters. Morphologic change in inland rivers and along the coast also degrades the positional accuracy of DEM features. DEM cell-value relative-contribution factors: CSC Coastal Lidar: 100, USACE hydrographic survey data: 5, NOS hydrographic soundings: 5, Digitized features: 1.
result: (missing)
report: (DQ_AbsoluteExternalPositionalAccuracy)
nameOfMeasure: Vertical Positional Accuracy Report
evaluationMethodDescription: The vertical accuracy of bathymetric and topographic features in the DEM is dependent upon the accuracy of the input datasets used to determine corresponding cell values. Topography: 1 to 16 meters. Vertical accuracy of input topographic datasets limits accuracy of corresponding cells in DEM. Lidar: less than 1 meter. DEM cell relative-contribution factors: Louisiana Lidar, CSC Lidar: 100, Digitized features: 10. Bathymetry: 0.1 meters to 5% of water depth. Vertical accuracy of input bathymetric datasets limits accuracy of corresponding cells in DEM. Early 20th-century NOS hydrographic soundings are limited by sparseness of deep-water soundings, and potentially large position accuracy of pre-satellite (i.e., GPS) navigation: several meters. DEM cell relative-contribution factors: CSC Coastal Lidar: 100, USACE hydrographic survey data: 5, NOS hydrographic soundings: 5, Digitized features: 1. Gridding interpolation to determine cell values between sparse NOS hydrographic soundings in deep water degrades the vertical accuracy of deep-water elevations.
result: (missing)
report: (DQ_CompletenessCommission)
evaluationMethodDescription: NGDC made every effort to obtain all available digital topographic and bathymetric datasets in the region for use in building the DEM.
result: (unknown)
report: (DQ_ConceptualConsistency)
measureDescription: Datasets were visually compared internally and externally (with other overlapping datasets and satellite images and maps) in ESRI ArcGIS for identification of anomalous elevations or data inconsistencies. Where elevation inconsistencies occurred, the most recent and/or highest resolution data set was selected for use in that region. Elevations in the older and/or lower-resolution datasets were deleted prior to building the DEM.
result: (unknown)
lineage: (LI_Lineage)
processStep: (LE_ProcessStep)
description: All datasets obtained by NGDC were converted to common horizontal and vertical datums of NAD 83 geographic and NAVD 88, respectively, using Proj4 and VDatum transformation tool. They were also converted to common file format, ESRI point shapefiles, for visualization and inspection.
dateTime:
DateTime: 2010-08-28T00:00:00
processor: (CI_ResponsibleParty)
individualName: Matthew R. Love
organisationName: NOAA National Centers for Environmental Information
role: (CI_RoleCode) pointOfContact
processStep: (LE_ProcessStep)
description: Datasets were visually inspected with ArcGIS for identification and editing of data anomalies. Datasets were then compared with overlapping datasets to ensure data consistency.
dateTime:
DateTime: 2010-09-01T00:00:00
processStep: (LE_ProcessStep)
description: Coastline datasets were merged and adjusted to fit satellite imagery.
dateTime:
DateTime: 2010-09-24T00:00:00
processStep: (LE_ProcessStep)
description: xyz files of the bathymetric data were surfaced using GMT's 'surface' tool onto a 1 arc-second grid that interpolated to fill empty cells. Points extracted every 10 meters along the coastline were also included to ensure that the bathymetric grid reached zero at the coast. The resulting netCDF grid was clipped to the coastline to remove values over land.
dateTime:
DateTime: 2010-09-30T00:00:00
processStep: (LE_ProcessStep)
description: xyz files for each input dataset were gridded using MB-System's 'mbgrid' tool, which utilizes a high-tension spline interpolation method to fill grid cells with no input elevation values. Preferential weighting was given to more recent, higher-accuracy datasets. Gridding was performed with a 5% data buffer.
dateTime:
DateTime: 2010-10-20T00:00:00
processStep: (LE_ProcessStep)
description: The NAVD 88 DEM was quantitatively evaluated by comparing with source datasets and with elevation values extracted from NGS geodetic monuments. It was visually evaluated by converting to UTM-zone coordinates (units of meters horizontally and vertically) and then creating a slope grid to identify gridding artifacts in the DEM.
dateTime:
DateTime: 2010-10-24T00:00:00
source: (LI_Source)
description: Source Contribution: Hydrographic surveys provided to NGDC by CSDL ; Source Type: digital files via FTP
sourceCitation: (CI_Citation)
title: NOS Hydrographic Surveys
date: (CI_Date)
date: 2009-01-01
dateType: (CI_DateTypeCode) publication
citedResponsibleParty: (CI_ResponsibleParty)
organisationName: DOC/NOAA/NOS/OCS/CSDL > Coastal Survey Development Laboratory, OCS, NOS, NOAA, U.S. Department of Commerce
role: (CI_RoleCode) originator
citedResponsibleParty: (CI_ResponsibleParty)
organisationName: (inapplicable)
contactInfo: (CI_Contact)
onlineResource: (CI_OnlineResource)
linkage: https://tidesandcurrents.noaa.gov/csdl.html
name: CSDL non-superceded NOS Hydrographic Survey Database
description: Digital database of non-superceded NOS hydrographic surveys that date back to the late 19th century.
function: (CI_OnLineFunctionCode) download
role: (inapplicable)
sourceExtent: (EX_Extent)
temporalElement: (EX_TemporalExtent)
extent:
TimePeriod:
beginPosition: 1897-01-01
endPosition: 2001-01-01
source: (LI_Source)
description: Source Contribution: Hydrographic surveys for New Orleans District ; Source Type: online
sourceCitation: (CI_Citation)
title: USACE Hydrographic Surveys
date: (CI_Date)
date: 2009-01-01
dateType: (CI_DateTypeCode) publication
citedResponsibleParty: (CI_ResponsibleParty)
organisationName: U.S. Army Corps of Engineers, New Orleans District
role: (CI_RoleCode) originator
citedResponsibleParty: (CI_ResponsibleParty)
organisationName: (inapplicable)
contactInfo: (CI_Contact)
onlineResource: (CI_OnlineResource)
linkage: http://www.mvn.usace.army.mil/
name: USACE New Orleans District Hydrographic Surveys
description: Digital database of hydrographic surveys in New Orleans District
function: (CI_OnLineFunctionCode) download
role: (inapplicable)
sourceExtent: (EX_Extent)
temporalElement: (EX_TemporalExtent)
extent:
TimeInstant:
timePosition: 2009-01-01
source: (LI_Source)
description: Source Contribution: coastal lidar ; Source Type: online
sourceCitation: (CI_Citation)
title: NOAA Coastal Services Center Coastal Bathymetric-Topographic Lidar
date: (CI_Date)
date: 2005-01-01
dateType: (CI_DateTypeCode) publication
citedResponsibleParty: (CI_ResponsibleParty)
organisationName: DOC/NOAA/NOS/CSC > Coastal Services Center, National Ocean Service, NOAA, U.S. Department of Commerce
role: (CI_RoleCode) originator
citedResponsibleParty: (CI_ResponsibleParty)
organisationName: (inapplicable)
contactInfo: (CI_Contact)
onlineResource: (CI_OnlineResource)
linkage: http://www.google.com/url?q=http%3A%2F%2Fwww.ngdc.noaa.gov%2Fdocucomp%2Fpage%3Fxml%3DNOAA%2FNESDIS%2FNGDC%2FCollection%2Fiso%2Fxml%2FUSCoastalLidarElevationData.xml%26amp%3Bview%3DgetDataView%26amp%3Bheader%3DnoneTCM%2F&sa=D&sntz=1&usg=AFQjCNHc0sLvXk7iHVPyZC57I2r7-g4zCATCM/
name: 2005 USACE Post-Hurricane Katrina Topographic/Bathymetric Mapping
description: CSC coastal bathymetric-topographic Lidar
function: (CI_OnLineFunctionCode) download
role: (inapplicable)
sourceExtent: (EX_Extent)
temporalElement: (EX_TemporalExtent)
extent:
TimeInstant:
timePosition: 2005-01-01
source: (LI_Source)
description: Source Contribution: Louisiana levee lidar ; Source Type: online
sourceCitation: (CI_Citation)
title: NOAA Coastal Services Center Levee Topographic Lidar
date: (CI_Date)
date: 2005-01-01
dateType: (CI_DateTypeCode) publication
citedResponsibleParty: (CI_ResponsibleParty)
organisationName: DOC/NOAA/NOS/CSC > Coastal Services Center, National Ocean Service, NOAA, U.S. Department of Commerce
role: (CI_RoleCode) originator
citedResponsibleParty: (CI_ResponsibleParty)
organisationName: (inapplicable)
contactInfo: (CI_Contact)
onlineResource: (CI_OnlineResource)
linkage: http://www.google.com/url?q=http%3A%2F%2Fwww.ngdc.noaa.gov%2Fdocucomp%2Fpage%3Fxml%3DNOAA%2FNESDIS%2FNGDC%2FCollection%2Fiso%2Fxml%2FUSCoastalLidarElevationData.xml%26amp%3Bview%3DgetDataView%26amp%3Bheader%3DnoneTCM%2F&sa=D&sntz=1&usg=AFQjCNHc0sLvXk7iHVPyZC57I2r7-g4zCATCM/
name: 2005 USACE Post-Hurricane Katrina Louisiana Levee Mapping
description: CSC topographic lidar
function: (CI_OnLineFunctionCode) download
role: (inapplicable)
sourceExtent: (EX_Extent)
temporalElement: (EX_TemporalExtent)
extent:
TimeInstant:
timePosition: 2005-01-01
source: (LI_Source)
description: Source Contribution: composite shoreline downloaded from web site. ; Source Type: online
sourceCitation: (CI_Citation)
title: Composite Shoreline and associated data of Louisiana State Composite, LA_COMP
date: (CI_Date)
date: 2001-01-01
dateType: (CI_DateTypeCode) publication
citedResponsibleParty: (CI_ResponsibleParty)
organisationName: DOC/NOAA/NOS/NGS > National Geodetic Survey, National Ocean Service, NOAA, U.S Department of Commerce
role: (CI_RoleCode) originator
citedResponsibleParty: (CI_ResponsibleParty)
organisationName: (inapplicable)
contactInfo: (CI_Contact)
onlineResource: (CI_OnlineResource)
linkage: http://www.ngs.noaa.gov/RSD/shoredata/NGS_Shoreline_Products.htm
name: Composite Shoreline and associated data of Louisiana State Composite, LA_COMP
description: The shoreline and associated data are a representation based on an office interpretation of imagery at the time of photographs taken 19780101 to 19860301.
function: (CI_OnLineFunctionCode) download
role: (inapplicable)
sourceExtent: (EX_Extent)
temporalElement: (EX_TemporalExtent)
extent:
TimePeriod:
beginPosition: 1978-01-01
endPosition: 1986-01-01
source: (LI_Source)
description: Source Contribution: topographic lidar ; Source Type: online
sourceCitation: (CI_Citation)
title: Louisiana State topographic lidar
date: (CI_Date)
date: 1999-01-01
dateType: (CI_DateTypeCode) publication
citedResponsibleParty: (CI_ResponsibleParty)
organisationName: "Atlas: The Louisiana Statewide GIS." LSU CADGIS Research Laboratory
role: (CI_RoleCode) originator
citedResponsibleParty: (CI_ResponsibleParty)
organisationName: (inapplicable)
contactInfo: (CI_Contact)
onlineResource: (CI_OnlineResource)
linkage: http://atlas.lsu.edu/lidar/
name: Atlas: The Louisiana Statewide GIS.
description: Lidar data distribution of 1999 Louisiana Lidar.
function: (CI_OnLineFunctionCode) download
role: (inapplicable)
sourceExtent: (EX_Extent)
temporalElement: (EX_TemporalExtent)
extent:
TimeInstant:
timePosition: 1999-01-01
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metadataMaintenance: (MD_MaintenanceInformation)
maintenanceAndUpdateFrequency: (MD_MaintenanceFrequencyCode) annually
maintenanceNote: This metadata was automatically generated from the Content Standard for Digital Geospatial Metadata: Extensions for Remote Sensing Metadata standard (version FGDC-STD-012-2002) using the 2012-08-07. f version of the FGDC RSE to ISO 19115-2 transform for DEMs.
maintenanceNote: Last Translation from FGDC 2012-08-07T15:54:25.107-06:00
maintenanceNote: This record was automatically modified on 2015-09-03 to include references to NCEI where applicable.
contact: (CI_ResponsibleParty)
individualName: Kelly Carignan
organisationName: NOAA National Centers for Environmental Information
contactInfo: (CI_Contact)
address: (CI_Address)
electronicMailAddress: kelly.carignan@noaa.gov
role: (CI_RoleCode) pointOfContact
contact: (CI_ResponsibleParty)
organisationName: NOAA National Centers for Environmental Information
positionName: Metadata Specialist
role: (CI_RoleCode) editor
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acquisitionInformation: (MI_AcquisitionInformation)
instrument: (MI_Instrument)
identifier: (inapplicable)
type: Light Detection and Ranging
instrument: (MI_Instrument)
identifier: (inapplicable)
type: Sound Navigation and Ranging
operation: (MI_Operation)
identifier: (MD_Identifier)
code: NOAA HFIP DEM Project
status: (missing)
parentOperation: (inapplicable)
platform: (MI_Platform)
identifier: (MD_Identifier)
code: Digital Elevation Model
description: (missing)
instrument: (missing)