# Statewide 100-year Floodplain Polygons for West Virginia

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# Metadata:

- Identification_Information
- Data_Quality_Information
- Spatial_Data_Organization_Information
- Spatial_Reference_Information
- Entity_and_Attribute_Information
- Distribution_Information
- Metadata_Reference_Information

Identification_Information:
  Citation:
    Citation_Information:
      Originator: West Virginia GIS Technical Center
      Publication_Date: 20130410
      Title: Statewide 100-year Floodplain Polygons for West Virginia
      Geospatial_Data_Presentation_Form: Vector Digital Data Set (Polygon)
      Publication_Information:
        Publication_Place: Morgantown, WV
        Publisher: West Virginia GIS Technical Center
      Online_Linkage: <http://wvgis.wvu.edu/data/dataset.php?ID=373>
      Online_Linkage: <http://www.wvgis.wvu.edu>
  Description:
    Abstract:
      The statewide 100-year floodplain polygon data set was first compiled in 2006 from the best flood data currently available from the Federal Emergency Management Agency (FEMA). Data sources for the current version include the National Flood Hazard Layer (NFHL), Effective DFIRM databases, Preliminary DFIRM databases and Q3 digital floodplain shapefiles.
    Purpose:
      This data set was developed primarily for use in the West Virginia GIS Technical Center's web-based Flood Tool, which enables users to estimate flood risk and the "in" or "out" status of specific properties or structures relative to areas (Flood Zones) of 1% annual chance flooding.
  Time_Period_of_Content:
    Time_Period_Information:
      Single_Date/Time:
        Calendar_Date: 20130410
    Currentness_Reference: publication date
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: As needed
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -82.64474294
      East_Bounding_Coordinate: -77.725291015
      North_Bounding_Coordinate: 40.638810501
      South_Bounding_Coordinate: 37.206718893
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: ISO 19115 Topic Category
      Theme_Keyword: inlandWaters
    Theme:
      Theme_Keyword_Thesaurus: FEMA NFIP Topic Category
      Theme_Keyword: FEMA Flood Hazard Zone
      Theme_Keyword: Special Flood Hazard Area
      Theme_Keyword: Riverine Flooding
      Theme_Keyword: Flood Insurance Rate Map
      Theme_Keyword: FIRM
      Theme_Keyword: DFIRM
      Theme_Keyword: Floodway
    Theme:
      Theme_Keyword_Thesaurus: None
      Theme_Keyword: flooding
      Theme_Keyword: flood
      Theme_Keyword: floodplain
      Theme_Keyword: flood hazard determination tool
      Theme_Keyword: flood hazard determination map
      Theme_Keyword: advisory flood height
      Theme_Keyword: modeled approximate A zone
      Theme_Keyword: riverine flooding
      Theme_Keyword: flood hazard area
    Theme:
      Theme_Keyword_Thesaurus: EPA GIS Keyword Thesaurus
      Theme_Keyword: Disaster
      Theme_Keyword: Emergency
      Theme_Keyword: Hazards
      Theme_Keyword: Risk
      Theme_Keyword: Surface Water
      Theme_Keyword: Water
    Place:
      Place_Keyword_Thesaurus: None
      Place_Keyword: West Virginia
  Access_Constraints: None
  Use_Constraints:
    This data is derived from effective, preliminary and draft FEMA flood data, but is not intended to replace official FEMA publications. Acknowledgement of FEMA and the West Virginia GIS Technical Center will be appreciated in presentations or publications that make use of this data.
  Point_of_Contact:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: Eric Hopkins
        Contact_Organization: West Virginia GIS Technical Center
      Contact_Position: GIS Specialist
      Contact_Address:
        Address_Type: mailing
        Address: West Virginia University
        Address: Department of Geology and Geography
        City: Morgantown
        State_or_Province: West Virginia
        Postal_Code: 26506
      Contact_Voice_Telephone: (304) 293-9463
      Contact_Electronic_Mail_Address: ehopkins@wvu.edu
  Data_Set_Credit: West Virginia GIS Technical Center
  Native_Data_Set_Environment:
    Environment as of Metadata Creation: Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 10.1 (Build 3035) Service Pack 1 (Build 3143)
  Cross_Reference:
    Citation_Information:
      Originator: Federal Emergency Management Agency (FEMA)
      Publication_Date: 20121231
      Title: Effective Countywide DFIRMs for West Virginia
      Geospatial_Data_Presentation_Form: vector digital data
      Publication_Information:
        Publication_Place: Washington, DC, USA
        Publisher: Federal Emergency Management Agency
      Other_Citation_Details: DFIRM dates are 2008 and earlier
      Online_Linkage: <http://msc.fema.gov>
  Cross_Reference:
    Citation_Information:
      Originator: Federal Emergency Management Agency (FEMA)
      Publication_Date: 1988
      Title: Digital Q3 Flood Data
      Geospatial_Data_Presentation_Form: vector digital data
      Publication_Information:
        Publication_Place: Washington, DC, USA
        Publisher: Federal Emergency Management Agency (FEMA)
      Online_Linkage: <http://www.fema.gov/hazard/map/q3.shtm>
  Cross_Reference:
    Citation_Information:
      Originator:
        FEMA Cooperating Technical Partners (CTPs), Flood mapping contractors
      Publication_Date: Unpublished material
      Title: Draft DFIRM Data
      Geospatial_Data_Presentation_Form: vector digital data
      Online_Linkage:
        <ftp://ftp.wvgis.wvu.edu/pub/Clearinghouse/water_resources/DFIRM-lite>

Data_Quality_Information:
  Attribute_Accuracy:
    Attribute_Accuracy_Report:
      The DFIRM Database consists of countywide vector files and associated attributes produced in conjunction with the hard copy FEMA FIRM. The published effective FIRM and DFIRM maps are issued as the official designation of the SFHAs. As such they are adopted by local communities and form the basis for administration of the NFIP. For these purposes they are authoritative. Provisions exist in the regulations for public review, appeals and corrections of the flood risk information shown to better match real world conditions. As with any engineering analysis of this type, variation from the estimated flood heights and floodplain boundaries is possible. Details of FEMA's requirements for the Flood Insurance Studies (FISs) and flood mapping process that produces these data are available in the Guidelines and Specifications for Flood Hazard Mapping Partners. Attribute accuracy was tested by manual comparison of source graphics with hardcopy plots and a symbolized display on an interactive computer graphic System. Independent quality control testing of FEMA's DFIRM databases was also performed. To obtain more detailed information in areas where Base Flood Elevations (BFEs) and/or floodways have been determined, users are encouraged to consult the Flood Profiles and Floodway Data and/or Summary of Stillwater Elevations tables contained within the FIS reports that accompany the Effective DFIRM databases. Users should be aware that BFEs shown in the S_BFE table represent rounded whole-foot elevations. These BFEs are intended for flood insurance rating purposes only and should not be used as the sole source of flood elevation information. Accordingly, flood elevation data presented in the FIS report must be used in conjunction with the FIRM for purposes of construction and/or floodplain management. The 1-percent-annual-chance water-surface elevations shown in theDFIRM database S_XS table match the regulatory elevations shown in the FIS report. This data set does not include cross section (XS) or BFE information.
  Logical_Consistency_Report:
    The floodplains depicted in this data have been compared to the NFHL, Effective DFIRM, Preliminary DFIRM or Q3 source material to check for alignment errors or omissions. Effective DFIRMs, including the NFHL, which is compiled from Effective DFIRM data, have been subjected, during production and after delivery, to more thorough analysis and checking for spatial agreement of features.
  Completeness_Report:
    Data contained in the DFIRM Database files reflect the content of the source materials. Features may have been eliminated or generalized on the source graphic, due to scale and legibility constraints. With new mapping, FEMA plans to maintain full detail in the spatial data it produces. However, older information is often transferred from existing maps where some generalization has taken place. Flood risk data are developed for communities participating in the National Flood Insurance Program (NFIP) for use in insurance rating and for floodplain management. Flood hazard areas are determined using statistical analyses of records of river flow, storm tides, and rainfall; information obtained through consultation with the communities; floodplain topographic surveys; and hydrological and hydraulic analysis. Both detailed and approximate analyses are employed. Generally, detailed analyses are used to generate flood risk data only for developed or developing areas of communities. For areas where little or no development is expected to occur, FEMA uses approximate analyses to generate flood risk data. Typically, only drainage areas that are greater than one square mile are studied.
  Positional_Accuracy:
    Horizontal_Positional_Accuracy:
      Horizontal_Positional_Accuracy_Report:
        Horizontal accuracy of Effective DFIRM data was tested by manual comparison of source graphics with hardcopy plots and a symbolized display on an interactive computer graphic system. Independent quality control testing of FEMA's DFIRM database was also performed.
    Vertical_Positional_Accuracy:
      Vertical_Positional_Accuracy_Report:
        The DFIRM Databases used to compile this data set consist of countywide vector files and associated attributes produced in conjunction with the hardcopy FEMA FIRM. The published effective FIRM and DFIRM maps are issued as the official designation of the SFHAs. As such they are adopted by local communities and form the basis for administration of the NFIP. For these purposes they are authoritative. Provisions exist in the regulations for public review, appeals and corrections of the flood risk information shown to better match real world conditions. As with any engineering analysis of this type, variation from the estimated flood heights and floodplain boundaries is possible. Details of FEMA's requirements for the FISs and flood mapping process that produces these data are available in the Guidelines and Specifications for Flood Hazard Mapping Partners. Vertical accuracy of the countywide DFIRM databases was tested by manual comparison of source graphics with hardcopy plots and a symbolized display on an interactive computer graphic system. Independent quality control testing of FEMA's DFIRM database was also performed.
  Lineage:
    Process_Step:
      Process_Description:
        Dataset compiled from Effective DFIRM, Draft DFIRM, and Q3 flood hazard polygon data
      Process_Date: 2006
    Process_Step:
      Process_Description:
        Incorporated new Effective DFIRM and Draft DFIRM data. Zone A, Zone AE, and Zone AO polygons were copied into the existing statewide data set.
      Process_Date: 200807
    Process_Step:
      Process_Description:
        Incorporated new Effective and Preliminary DFIRM data. Zone A, Zone AE, and Zone AO polygons were copied into the existing statewide data set.
      Process_Date: 20100826
    Process_Step:
      Process_Description:
        Incorporated new model-based Approximate A Zone (Advisory Flood Height) data from AMEC Earth and Environmental for five counties into the new statewide floodplain data set: Marion, Harrison, Mineral, Mingo and Wayne. The floodplain polygons in these five counties match the water surface and depth grid raster data provided by AMEC and incorporated into the WV Flood Hazard Determination Tool. This will not be the case in counties where the DFIRM became effective before the new Approximate A Zone data was published.
      Process_Date: 20100826
    Process_Step:
      Process_Description:
        Incorporated new Effective and Preliminary DFIRM data for eight counties: Effective: Barbour, Doddridge, Nicholas, Pocahontas; Preliminary: Greenbrier, Roane, Webster, Wirt. Zone A, Zone AE, and Zone AO polygons were copied into the existing statewide data set.
      Process_Date: 20120206
    Process_Step:
      Process_Description:
        Incorporated new model-based Approximate A Zone (Advisory Flood Height) data from AMEC Earth and Environmental for eight counties into the new statewide floodplain data set: Fayette, Greenbrier, Kanawha, Logan, McDowell, Mercer, Raleigh, Wyoming. The floodplain polygons in these five counties match the water surface and depth grid raster data provided by AMEC and incorporated into the WV Flood Hazard Determination Tool. This will not be the case in counties where the DFIRM became effective before the new Approximate A Zone data was published.
      Process_Date: 20120206
    Process_Step:
      Process_Description:
        Incorporated new Effective and Preliminary DFIRM data for seventeen counties: Effective: Greenbrier, Harrison, Marion, Mingo, Preston, Putnam, Ritchie, Roane, Taylor, Webster, Wirt; Preliminary: Boone, Clay, Lincoln, Mason, Pleasants, Wood. Zone A, Zone AE, and Zone AO polygons were copied into the existing statewide data set.
      Process_Date: 20130228

Spatial_Data_Organization_Information:
  Direct_Spatial_Reference_Method: Vector
  Point_and_Vector_Object_Information:
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: G-polygon
      Point_and_Vector_Object_Count: 2436

Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Planar:
      Map_Projection:
        Map_Projection_Name:
          WGS 1984 Web Mercator Auxiliary Sphere (ESRI Full Name: WGS_1984_Web_Mercator_Auxiliary_Sphere)
        Transverse_Mercator:
          Scale_Factor_at_Central_Meridian: 1.0
          Longitude_of_Central_Meridian: 0.0
          Latitude_of_Projection_Origin: 0.0
          False_Easting: 0.0
          False_Northing: 0.0
      Planar_Coordinate_Information:
        Planar_Coordinate_Encoding_Method: coordinate pair
        Coordinate_Representation:
          Abscissa_Resolution: 0.6096
          Ordinate_Resolution: 0.6096
        Planar_Distance_Units: Meter
    Geodetic_Model:
      Horizontal_Datum_Name: D_WGS_1984
      Ellipsoid_Name: WGS_1984
      Semi-major_Axis: 6378137.0
      Denominator_of_Flattening_Ratio: 298.257223563

Entity_and_Attribute_Information:
  Overview_Description:
    Entity_and_Attribute_Overview:
      The DFIRM Database is made up of several data themes containing both spatial and attribute information. These data together represent the current flood risk for the subject area as identified by FEMA. The attribute tables include SFHA locations, flood zone designations, BFEs, political entities, cross-section locations, FIRM panel information, and other data related to the NFIP.
    Entity_and_Attribute_Detail_Citation:
      West Virginia GIS Technical Center and FEMA Guidelines and Specifications for Digital Flood Mapping.

Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: West Virginia GIS Technical Center
        Contact_Person: Eric Hopkins
      Contact_Position: GIS Specialist
      Contact_Address:
        Address_Type: mailing and physical
        Address: WVU Dept. of Geology and Geography
        Address: Brooks Hall rm 330
        City: Morgantown
        State_or_Province: WV
        Postal_Code: 26506-6300
      Contact_Voice_Telephone: (304) 293-9463
      Contact_Electronic_Mail_Address: Eric.Hopkins@mail.wvu.edu
  Resource_Description: Downloadable Data
  Distribution_Liability:
    Although these data have been processed successfully on a computer system at the West Virginia GIS Technical Center, no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data to evaluate data set limitations, restrictions or intended use. The West Virginia GIS Technical Center shall not be held liable for improper or incorrect use of the data described and/or contained herein.
  Standard_Order_Process:
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: Vector Digital Data Set (Polygon)
        Format_Version_Number: 1
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: <http://wvgis.wvu.edu/data/dataset.php?action=search&ID=373>
    Fees: none

Metadata_Reference_Information:
  Metadata_Date: 20130422
  Metadata_Future_Review_Date: 20140914
  Metadata_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: West Virginia GIS Technical Center
        Contact_Person: Eric Hopkins
      Contact_Position: GIS Specialist
      Contact_Address:
        Address_Type: mailing and physical
        Address: WVU Dept. of Geology and Geography
        Address: Brooks Hall rm 330
        City: Morgantown
        State_or_Province: WV
        Postal_Code: 26506-6300
      Contact_Voice_Telephone: (304) 293-9463
      Contact_Electronic_Mail_Address: Eric.Hopkins@mail.wvu.edu
  Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
  Metadata_Standard_Version: FGDC-STD-001-1998
  Metadata_Time_Convention: local time
  Metadata_Access_Constraints: none
  Metadata_Use_Constraints: none
  Metadata_Extensions:
    Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
    Profile_Name: ESRI Metadata Profile

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