Statewide 100-year Floodplain Polygons for West Virginia

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: West Virginia GIS Technical Center
Publication_Date: 20100826
Title: Statewide 100-year Floodplain Polygons for West Virginia
Geospatial_Data_Presentation_Form: vector digital data
Online_Linkage: <http://wvgis.wvu.edu/data/dataset.php?action=search&ID=128>
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 include Q3 digital floodplains, Draft DFIRM, Preliminary DFIRM and Effective DFIRM.
Purpose:
This data set was developed primarily for use in the West Virginia GIS Technical Center's web-based flood hazard determination tool, which enables users to make initial determinations regarding the location of specific properties in or out of areas of 1% annual chance flooding.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20100826
Currentness_Reference: publication date
Status:
Progress: In work
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -82.698657
East_Bounding_Coordinate: -77.676669
North_Bounding_Coordinate: 40.452177
South_Bounding_Coordinate: 37.165440
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:
Theme_Keyword_Thesaurus: none
Theme_Keyword: flooding
Theme_Keyword: riverine flooding
Theme_Keyword: flood hazard area
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: Lead GIS Specialist
Contact_Address:
Address_Type: mailing
Address: West Virginia University
Address: Department of Geology and Geography
Address: 330 Brooks Hall
Address: PO Box 6300
City: Morgantown
State_or_Province: West Virginia
Postal_Code: 26506
Country: USA
Contact_Voice_Telephone: (304) 293-9463
Contact_Electronic_Mail_Address: ehopkins@wvu.edu
Hours_of_Service: 9:00 A.M - 5:00 P.M.
Data_Set_Credit: West Virginia GIS Technical Center
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.6.1500
Cross_Reference:
Citation_Information:
Originator: Federal Emergency Management Agency (FEMA)
Publication_Date: 2008
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. Draft DFIRM data has not been independently tested. 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 does not include cross section (XS) or BFE information.
Logical_Consistency_Report:
The floodplains depicted in this data have been compared to the Effective DFIRM, Q3, Preliminary DFIRM or Draft DFIRM source material to check for alignment errors or omissions. Effective DFIRMs have been subjected 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.
Lineage:
Process_Step:
Process_Description:
Dataset compiled from Effective DFIRM, Draft DFIRM, and Q3 flood hazard polygon data
Process_Date: 2006
Source_Used_Citation_Abbreviation: DFIRM, Draft, Q3
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
Source_Used_Citation_Abbreviation: DFIRM, Draft DFIRM, Q3
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
Source_Used_Citation_Abbreviation: DFIRM, Preliminary DFIRM, Draft DFIRM, Q3
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.
Process_Date: 2010826
Source_Used_Citation_Abbreviation:
modeled Approximate A Zone, Advisory Flood Height (AFH)
Note that we need to add source elements that describe the items listed above under Source_Used_Citation.
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: 2052

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 17
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -81.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.001024
Ordinate_Resolution: 0.001024
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: North American Vertical Datum of 1988
Altitude_Resolution: 1.000000
Altitude_Distance_Units: feet
Altitude_Encoding_Method:
Explicit elevation coordinate included with horizontal coordinates

Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: VECTUSR.femaAll5
Entity_Type_Definition: Location and attributes for floodplain polygons
Entity_Type_Definition_Source:
FEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at <http://www.fema.gov/fhm/dl_cgs.shtm>)
Detailed_Description:
Entity_Type:
Entity_Type_Label: OBJECTID
Entity_Type_Definition: Internal feature number
Entity_Type_Definition_Source: ESRI
Detailed_Description:
Entity_Type:
Entity_Type_Label: ZONE
Entity_Type_Definition: Special Flood Hazard Area (SFHA)
Entity_Type_Definition_Source: DFIRM, Draft, Q3
Detailed_Description:
Entity_Type:
Entity_Type_Label: SHAPE
Entity_Type_Definition: Feature geometry
Entity_Type_Definition_Source: ESRI
Detailed_Description:
Entity_Type:
Entity_Type_Label: TYPE
Entity_Type_Definition: Data source, i.e. Effective, Preliminary, Draft, Q3
Entity_Type_Definition_Source: WVGISTC
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: West Virginia GIS Technical Center
Contact_Person: Eric Hopkins
Contact_Address:
Address_Type: mailing
Address: West Virginia University
Address: Department of Geology and Geography
Address: 330 Brooks Hall
Address: PO Box 6300
City: Morgantown
State_or_Province: West Virginia
Postal_Code: 26506
Country: USA
Contact_Voice_Telephone: (304) 293-9463
Contact_Electronic_Mail_Address: ehopkins@wvu.edu
Hours_of_Service: 9:00 A.M - 5:00 P.M.
Contact_Instructions:
Data requests must include the full name of the community or county and the FIRM panel number(s) or the 7.5- minute series quadrangle sheet area(s) covered by the request.
Distribution_Liability:
No warranty expressed or implied is made by the West Virginia GIS Technical Center regarding the utility of the data on any other system nor shall the act of distribution constitute any such warranty.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ESRI Shapefile
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: 20100914
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: West Virginia GIS Technical Center
Contact_Person: Eric Hopkins
Contact_Address:
Address_Type: mailing
Address: West Virginia University
Address: Department of Geology and Geography
Address: 330 Brooks Hall
Address: PO Box 6300
City: Morgantown
State_or_Province: West Virginia
Postal_Code: 26506
Country: USA
Contact_Voice_Telephone: (304) 293-9463
Contact_Electronic_Mail_Address: ehopkins@wvu.edu
Hours_of_Service: 9:00 A.M - 5:00 P.M.
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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