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Metadata Identifier: gov.noaa.ngdc.mgg.dem:742

Aggregation Info | Bands | Citations | Constraints | Coverage Descriptions | Dimensions | Extents | Formats | Geographic Bounding Box
Georectified Information | Georeferenceable Information | Identifiers | Instruments | Mediums | OnlineResources | Operations
Platforms | Process Steps | Range Elements | Reference Systems | Responsible Parties | Series | Sources | Spatial Grids | Temporal Extents

MD_DataIdentification

Count Component Title Abstract
1 Southern Louisiana 1/3 arc-second MHW DEM 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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SV_Identification

Unresolved Xlinks
Color Shaded Relief ArcGIS Map Service at: /gmi:MI_Metadata/gmd:identificationInfo[2]
Footprints ArcGIS Map Service at: /gmi:MI_Metadata/gmd:identificationInfo[3]
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CI_Citation

Count Component Title Date Citation Identifier
1 Composite Shoreline and associated data of Louisiana State Composite, LA_COMP
    2001-01-01
1 Digital Elevation Models of Southern Louisiana: Procedures, Data Sources, and Analysis
    2010-12-01
1 Louisiana State topographic lidar
    1999-01-01
1 NASA/GCMD Data Resolution Keywords
    1 NASA/GCMD Earth Science Keywords
      1 NASA/GCMD Location Keywords
        1 NASA/GCMD Platform Keywords
          1 NOAA Coastal Services Center Coastal Bathymetric-Topographic Lidar
            2005-01-01
          1 NOAA Coastal Services Center Levee Topographic Lidar
            2005-01-01
          1 NOAA HFIP Gridding Project
            2008-10-31
          1 NOS Hydrographic Surveys
            2009-01-01
          1 Southern Louisiana 1/3 arc-second MHW DEM
            2012-01-28
          1 USACE Hydrographic Surveys
            2009-01-01
          2 Uncontrolled
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            CI_Series

            Count Component Name Issue Identification Page
            1 NOAA Tsunami Inundation DEMs Southern Louisiana - MHW
            1 NOAA Tsunami Inundation DEMs Named by primary coastal city, state in DEM.
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            CI_ResponsibleParty

            Count Component Individual Organization Position Email Role Linkage
            12 Citation URL https://www.ngdc.noaa.gov/dem/squareCellGrid/download/742
            1 "Atlas: The Louisiana Statewide GIS." LSU CADGIS Research Laboratory originator
            1 Barry W. Eakins originator
            3 DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce publisher
            2 DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce originator
            2 DOC/NOAA/NOS/CSC > Coastal Services Center, National Ocean Service, NOAA, U.S. Department of Commerce originator
            1 DOC/NOAA/NOS/NGS > National Geodetic Survey, National Ocean Service, NOAA, U.S Department of Commerce originator
            1 DOC/NOAA/NOS/OCS/CSDL > Coastal Survey Development Laboratory, OCS, NOS, NOAA, U.S. Department of Commerce originator
            1 DOC/NOAA/OAR/PMEL/NCTR > NOAA Center for Tsunami Research, Pacific Marine Environmental Laboratory, OAR, NOAA, U.S. Department of Commerce originator
            1 Jason Caldwell originator
            1 Lisa A. Taylor originator
            1 Matthew R. Love originator
            1 U.S. Army Corps of Engineers, New Orleans District originator
            Unresolved Xlinks
            DEM Info at: /gmi:MI_Metadata/gmd:contact[1]
            NCEI (publisher) at: /gmi:MI_Metadata/gmd:identificationInfo[1]/gmd:MD_DataIdentification[1]/gmd:citation[1]/gmd:CI_Citation[1]/gmd:citedResponsibleParty[1]
            DEM Info at: /gmi:MI_Metadata/gmd:identificationInfo[1]/gmd:MD_DataIdentification[1]/gmd:pointOfContact[1]
            DEM information at: /gmi:MI_Metadata/gmd:distributionInfo[1]/gmd:MD_Distribution[1]/gmd:distributor[1]/gmd:MD_Distributor[1]/gmd:distributorContact[1]
            Matt Love at: /gmi:MI_Metadata/gmd:dataQualityInfo[2]/gmd:DQ_DataQuality[1]/gmd:lineage[1]/gmd:LI_Lineage[1]/gmd:processStep[1]/gmi:LE_ProcessStep[1]/gmd:processor[1]
            Kelly Carignan at: /gmi:MI_Metadata/gmd:metadataMaintenance[1]/gmd:MD_MaintenanceInformation[1]/gmd:contact[1]
            Anna Milan at: /gmi:MI_Metadata/gmd:metadataMaintenance[1]/gmd:MD_MaintenanceInformation[1]/gmd:contact[2]
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            CI_OnlineResource

            Count Component Linkage Name Description Function
            1 http://atlas.lsu.edu/lidar/ Atlas: The Louisiana Statewide GIS. Lidar data distribution of 1999 Louisiana Lidar. download
            2 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/ 2005 USACE Post-Hurricane Katrina Topographic/Bathymetric Mapping CSC coastal bathymetric-topographic Lidar download
            1 http://www.mvn.usace.army.mil/ USACE New Orleans District Hydrographic Surveys Digital database of hydrographic surveys in New Orleans District download
            1 http://www.ngs.noaa.gov/RSD/shoredata/NGS_Shoreline_Products.htm Composite Shoreline and associated data of Louisiana State Composite, LA_COMP The shoreline and associated data are a representation based on an office interpretation of imagery at the time of photographs taken 19780101 to 19860301. download
            1 https://tidesandcurrents.noaa.gov/csdl.html CSDL non-superceded NOS Hydrographic Survey Database Digital database of non-superceded NOS hydrographic surveys that date back to the late 19th century. download
            2 https://www.ngdc.noaa.gov/dem/squareCellGrid/download/742 Southern Louisiana 1/3 arc-second Tsunami Inundation DEM Download page for accessing DEM, metadata record and development report. download
            1 https://www.ngdc.noaa.gov/dem/squareCellGrid/getArchive/742 Southern Louisiana 1/3 arc-second MHW netCDF DEM DEM, metadata and Readme file for the Southern Louisiana DEM. download
            1 https://www.ngdc.noaa.gov/dem/squareCellGrid/getReport/742 Digital Elevation Models of Southern Louisiana: Procedures, Data Sources and Analysis Report describing the development of the Southern Louisiana DEM download
            1 https://www.ngdc.noaa.gov/mgg/inundation/hurricane/hfip.html NOAA HFIP DEM Project Project web page. information
            1 https://www.ngdc.noaa.gov/mgg/inundation/tsunami/inundation.html NOAA Tsunami Inundation Gridding Project Project web page. information
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            MD_Identifier or RS_Identifier

            Count Component Code
            1 Digital Elevation Model
            1 NOAA HFIP DEM Project
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            EX_Extent

            Bounding Box Temporal Extent
            Count Component Description West East North South Start End
            1 -91.6 -89.8 29.7 28.6 1888-01-01 2010-01-01
            1 1897-01-01 2001-01-01
            1
            2
            1 1978-01-01 1986-01-01
            1
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            EX_GeographicBoundingBox

            Count Component West East North South
            1 -91.6 -89.8 29.7 28.6
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            EX_TemporalExtent

            Count Component Start End
            1 1888-01-01 2010-01-01
            1 1897-01-01 2001-01-01
            4
            1 1978-01-01 1986-01-01
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            MD_Format

            Count Component Name Version specification
            1 netCDF 3.6.2
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            MD_Medium

            none found
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            MD_Constraints

            Unresolved Xlinks
            not for navigation at: /gmi:MI_Metadata/gmd:identificationInfo[1]/gmd:MD_DataIdentification[1]/gmd:resourceConstraints[1]
            copyright statement at: /gmi:MI_Metadata/gmd:identificationInfo[1]/gmd:MD_DataIdentification[1]/gmd:resourceConstraints[2]
            NOAA disclaimer at: /gmi:MI_Metadata/gmd:identificationInfo[1]/gmd:MD_DataIdentification[1]/gmd:resourceConstraints[3]
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            MD_ReferenceSystem

            Unresolved Xlinks
            WGS84 at: /gmi:MI_Metadata/gmd:referenceSystemInfo[1]
            NAVD88 at: /gmi:MI_Metadata/gmd:referenceSystemInfo[2]
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            MD_GridSpatialRepresentation

            Count Component Number of Dimensions Cell Geometry Code
            1 3 area
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            MD_Georeferenceable or MI_Georeferenceable

            none found
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            MD_Georectified or MI_Georectified

            none found
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            MD_Dimension

            Count Component Name Code Size
            1 row 30241
            1 column 11881
            1 vertical 1
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            MD_CoverageDescription or MI_CoverageDescription

            none found
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            MD_Band or MI_Band

            none found
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            MI_RangeElementDescription

            none found
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            MD_AggregateInformation

            Count Component Title Code Association Type Code
            1 Digital Elevation Models of Southern Louisiana: Procedures, Data Sources, and Analysis crossReference
            1 NOAA HFIP Gridding Project largerWorkCitation
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            LE_Source or LI_Source

            Count Component Title Date Description
            1 Composite Shoreline and associated data of Louisiana State Composite, LA_COMP 2001-01-01 Source Contribution: composite shoreline downloaded from web site. ; Source Type: online
            1 Louisiana State topographic lidar 1999-01-01 Source Contribution: topographic lidar ; Source Type: online
            1 NOAA Coastal Services Center Coastal Bathymetric-Topographic Lidar 2005-01-01 Source Contribution: coastal lidar ; Source Type: online
            1 NOAA Coastal Services Center Levee Topographic Lidar 2005-01-01 Source Contribution: Louisiana levee lidar ; Source Type: online
            1 NOS Hydrographic Surveys 2009-01-01 Source Contribution: Hydrographic surveys provided to NGDC by CSDL ; Source Type: digital files via FTP
            1 USACE Hydrographic Surveys 2009-01-01 Source Contribution: Hydrographic surveys for New Orleans District ; Source Type: online
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            LE_ProcessStep or LI_ProcessStep

            Count Component DateTime Description
            1 2010-08-28T00:00:00 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.
            Matt Love at Xpath: /gmi:MI_Metadata/gmd:dataQualityInfo[2]/gmd:DQ_DataQuality[1]/gmd:lineage[1]/gmd:LI_Lineage[1]/gmd:processStep[1]/gmi:LE_ProcessStep[1]/gmd:processor[1]
            1 2010-09-01T00:00:00 Datasets were visually inspected with ArcGIS for identification and editing of data anomalies. Datasets were then compared with overlapping datasets to ensure data consistency.
            1 2010-09-24T00:00:00 Coastline datasets were merged and adjusted to fit satellite imagery.
            1 2010-09-30T00:00:00 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.
            1 2010-10-20T00:00:00 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.
            1 2010-10-24T00:00:00 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.
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            MI_Operation

            Count Component Code Type Status Description
            1 NOAA HFIP DEM Project
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            MI_Platform

            Count Component Code Description
            1 Digital Elevation Model
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            MI_Instrument

            Count Component Code Type Description
            2 Light Detection and Ranging
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