FGDC Classic | FGDC FAQ | FGDC Plus | XML

Digital Flood Insurance Map (DFIRM) Database for Connecticut - Base Flood Elevation Lines (BFE)

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Federal Emergency Management Agency
Publication_Date: varies
Title:
Digital Flood Insurance Map (DFIRM) Database for Connecticut - Base Flood Elevation Lines (BFE)
Geospatial_Data_Presentation_Form: FEMA-DFIRM-Final
Publication_Information:
Publication_Place: Washington, DC
Publisher: Federal Emergency Management Agency
Online_Linkage: http://www.fema.gov/msc
Online_Linkage: http://www.cteco.uconn.edu/metadata/fema/document/DFIRM_Connecticut_Fairfield_County_09001C_20100618_metadata.htm
Online_Linkage: http://www.cteco.uconn.edu/metadata/fema/document/DFIRM_Connecticut_Harford_County_09003C_20110916_metadata.htm
Online_Linkage: http://www.cteco.uconn.edu/metadata/fema/document/DFIRM_Connecticut_Middlesex_County_09007C_20080828_metadata.htm
Online_Linkage: http://www.cteco.uconn.edu/metadata/fema/document/DFIRM_Connecticut_New_London_County_09011C_20110718_metadata.htm
Online_Linkage: http://www.cteco.uconn.edu/metadata/fema/document/DFIRM_Connecticut_NewHaven_County_09009C_20101217_metadata.htm
Online_Linkage: http://www.fema.gov/library/viewRecord.do?id=2206
Online_Linkage: http://www.cteco.uconn.edu/metadata/fema/document/frm_selected_pages_from_Appendix_L.PDF
Description:
Abstract:
Includes location and attributes for Base Flood Elevation Lines (BFE) shown on Digital Flood Insurance Rate (DFIRM) maps available for five Connecticut counties. See below for time period of each county DFIRM Database included in this statewide BFE layer. More current data may be available from the Federal Emergcy Management Agency (FEMA). The DFIRM Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual-chance flood event, and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA). The file is georeferenced to earth's surface using the State Plane projection and coordinate system. The specifications for the horizontal control of DFIRM data files are consistent with those required for mapping at a scale of 1:12,000.
Purpose:
The FIRM is the basis for floodplain management, mitigation, and insurance activities for the National Flood Insurance Program (NFIP). Insurance applications include enforcement of the mandatory purchase requirement of the Flood Disaster Protection Act, which "... requires the purchase of flood insurance by property owners who are being assisted by Federal programs or by Federally supervised, regulated or insured agencies or institutions in the acquisition or improvement of land facilities located or to be located in identified areas having special flood hazards," Section 2 (b) (4) of the Flood Disaster Protection Act of 1973. In addition to the identification of Special Flood Hazard Areas (SFHAs), the risk zones shown on the FIRMs are the basis for the establishment of premium rates for flood coverage offered through the NFIP. The DFIRM Database presents the flood risk information depicted on the FIRM in a digital format suitable for use in electronic mapping applications. The DFIRM database is a subset of the Digital FIS database that serves to archive the information collected during the FIS.
Supplemental_Information:
In Guidelines and Specifications for Flood Hazard Mapping Partners (http://www.fema.gov/library/viewRecord.do?id=2206), FEMA defines technical requirements, product specifications for Flood Hazard Maps and related National Flood Insurance Program (NFIP) products, and associated coordination and documentation activities. 


Time_Period_of_Content:
Time_Period_Information:
Multiple_Dates/Times:
Single_Date/Time:
Calendar_Date: 20100618
Single_Date/Time:
Calendar_Date: 20110916
Single_Date/Time:
Calendar_Date: 20080828
Single_Date/Time:
Calendar_Date: 20110718
Single_Date/Time:
Calendar_Date: 20101217
Currentness_Reference:
FIRM and FIS effective date for Fairfield, Hartford, Middlesex, New London, and New Haven Counties, respectively.
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Unknown
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -73.689110
East_Bounding_Coordinate: -71.784053
North_Bounding_Coordinate: 42.036804
South_Bounding_Coordinate: 41.005058
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: elevation
Theme_Keyword: environment
Theme_Keyword: hydrogrology
Theme_Keyword: inlandWaters
Theme_Keyword: oceans
Theme_Keyword: structure
Theme_Keyword: transportation
Theme:
Theme_Keyword_Thesaurus: FEMA NFIP Topic Category
Theme_Keyword: Base Flood Elevation
Theme_Keyword: CBRS
Theme_Keyword: Coastal Barrier Resources System
Theme_Keyword: Coastal Flooding
Theme_Keyword: DFIRM
Theme_Keyword: DFIRM Database
Theme_Keyword: Digital Flood Insurance Rate Map
Theme_Keyword: FEMA Flood Hazard Zone
Theme_Keyword: FIRM
Theme_Keyword: Flood Insurance Rate Map
Theme_Keyword: Floodway
Theme_Keyword: NFIP
Theme_Keyword: Riverine flooding
Theme_Keyword: SFHA
Theme_Keyword: Special Flood Hazard Area
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Fairfield County
Place_Keyword: Hartford County
Place_Keyword: Middlesex County
Place_Keyword: New London County
Place_Keyword: New Haven County
Access_Constraints: None.
Use_Constraints:
The hardcopy FIRM and DFIRM and the accompanying FISs are the official designation of SFHAs and Base Flood Elevations (BFEs) for the NFIP.  For the purposes of the NFIP, changes to the flood risk information published by FEMA may only be performed by FEMA and through the mechanisms established in the NFIP regulations (44 CFR Parts 59-78). These digital data are produced in conjunction with the hardcopy FIRMs and generally matches the hardcopy map exactly.  However the hardcopy flood maps and flood profiles are the authoritative documents for the NFIP. Acknowledgement of FEMA would be appreciated in products derived from these data.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Federal Emergency Management Agency
Contact_Address:
Address_Type: mailing address
Address:
500 C Street, S.W.
City: Washington
State_or_Province: District of Columbia
Postal_Code: 20472
Country: USA
Contact_Voice_Telephone: 1-800-358-9616
Contact_Electronic_Mail_Address: http://www.fema.gov/msc
Browse_Graphic:
Browse_Graphic_File_Name: http://www.cteco.uconn.edu/metadata/fema/browsegraphic/fema_dfirmfullview.gif
Browse_Graphic_File_Description:
Full view of DFIRM for Connecticut with data available for Fairfield, Hartford, Middlesex, New London, and New Haven counties.
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: http://www.cteco.uconn.edu/metadata/fema/browsegraphic/fema_dfirmdetailview.jpg
Browse_Graphic_File_Description:
Detail view of DFIRM Database with standard FEMA symbology
Browse_Graphic_File_Type: JPEG
Browse_Graphic:
Browse_Graphic_File_Name: http://www.cteco.uconn.edu/metadata/fema/browsegraphic/fema_dfirmcolorsymbologydetailview.jpg
Browse_Graphic_File_Description:
Detail view of DFIRM Database with color symbology applied by CT DEEP
Browse_Graphic_File_Type: JPEG
Browse_Graphic:
Browse_Graphic_File_Name: http://www.cteco.uconn.edu/metadata/fema/browsegraphic/fema_firm_legend.gif
Browse_Graphic_File_Description:
Legend for FEMA Flood Insurance Rate Maps (FIRM)
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: http://www.cteco.uconn.edu/metadata/fema/browsegraphic/fema_firm_notes_to_users.gif
Browse_Graphic_File_Description:
Notes to users included on FEMA Flood Insurance Rate Maps (FIRM)
Browse_Graphic_File_Type: GIF
Security_Information:
Security_Classification_System: None
Security_Classification: None
Security_Handling_Description: No restrictions for handling the data.
Native_Data_Set_Environment:
Original data development environment varies. Finishing of the data is done using ESRI's ArcGIS software.
Back to Top
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 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 database 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 report that accompanies this DFIRM database. 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 the S_XS table match the regulatory elevations shown in the FIS report.
Logical_Consistency_Report:
When FEMA revises an FIS, adjacent studies are checked to ensure agreement between flood elevations at the boundaries.  Likewise flood elevations at the confluence of streams studied independently are checked to ensure agreement at the confluence.  The FIRM and the FIS are developed together and care is taken to ensure that the elevations and other features shown on the flood profiles in the FIS agree with the information shown on the FIRM.  However, the elevations as shown on the FIRM are rounded whole-foot elevations.  They must be shown so that a profile recreated from the elevations on the FIRM will match the FIS profiles within one half of one foot.
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 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:
The DFIRM Database consists of countywide vector files and associated attributes produced in conjunction with the hardcopy FEMA FIRM. The published effective FIRM and DFIRM 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.  Horizontal 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 database was also performed.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
The DFIRM Database consists 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 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:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Federal Emergency Management Agency
Title:
Connecticut County DFIRM Database
Geospatial_Data_Presentation_Form: FEMA-DFIRM-Final
Publication_Information:
Publication_Place: Washington, DC
Publisher: Federal Emergency Management Agency
Other_Citation_Details:
DFIRM Database publiciation dates vary according to county
Online_Linkage: http://www.cteco.uconn.edu/metadata/fema/document/DFIRM_Connecticut_Fairfield_County_09001C_20100618_metadata.htm
Online_Linkage: http://www.cteco.uconn.edu/metadata/fema/document/DFIRM_Connecticut_Fairfield_County_09001C_20100618_metadata.xml
Online_Linkage: http://www.cteco.uconn.edu/metadata/fema/document/DFIRM_Connecticut_Harford_County_09003C_20110916_metadata.htm
Online_Linkage: http://www.cteco.uconn.edu/metadata/fema/document/DFIRM_Connecticut_Harford_County_09003C_20110916_metadata.xml
Online_Linkage: http://www.cteco.uconn.edu/metadata/fema/document/DFIRM_Connecticut_Middlesex_County_09007C_20080828_metadata.htm
Online_Linkage: http://www.cteco.uconn.edu/metadata/fema/document/DFIRM_Connecticut_Middlesex_County_09007C_20080828_metadata.xml
Online_Linkage: http://www.cteco.uconn.edu/metadata/fema/document/DFIRM_Connecticut_New_London_County_09011C_20110718_metadata.htm
Online_Linkage: http://www.cteco.uconn.edu/metadata/fema/document/DFIRM_Connecticut_New_London_County_09011C_20110718_metadata.xml
Online_Linkage: http://www.cteco.uconn.edu/metadata/fema/document/DFIRM_Connecticut_NewHaven_County_09009C_20101217_metadata.htm
Online_Linkage: http://www.cteco.uconn.edu/metadata/fema/document/DFIRM_Connecticut_NewHaven_County_09009C_20101217_metadata.xml
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Multiple_Dates/Times:
Single_Date/Time:
Calendar_Date: 20100618
Single_Date/Time:
Calendar_Date: 20110916
Single_Date/Time:
Calendar_Date: 20080828
Single_Date/Time:
Calendar_Date: 20110718
Single_Date/Time:
Calendar_Date: 20101217
Source_Currentness_Reference:
FIRM and FIS effective date for Fairfield, Hartford, Middlesex, New London, and New Haven Counties, respectively.
Source_Citation_Abbreviation:
County DFIRM
Source_Information:
Source_Citation:
Citation_Information:
Title:
Connecticut statewide DFIRM Database
Type_of_Source_Media: disc
Source_Citation_Abbreviation:
Connecticut DFIRM
Process_Step:
Process_Description:
Appended and added together available county-level DFIRM data to create a statewide feature class for Connecticut for use by the Connecticut Department of Energy and Environmental Protection.
Source_Used_Citation_Abbreviation:
County DFIRM
Process_Date: 20110901
Source_Produced_Citation_Abbreviation:
Connecticut DFIRM
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Connecticut Department of Energy and Environmental Protection
Contact_Person: Courtney Larson
Contact_Address:
Address_Type: mailing and physical address
Address:
79 Elm Street
City: Hartford
State_or_Province: Connecticut
Postal_Code: 06106
Country: USA
Contact_Voice_Telephone: 860-424-3540
Back to Top
Spatial_Data_Organization_Information:
Indirect_Spatial_Reference_Method:
{ Describe location of data in terms of attributes included in the data that denote geographic location. For example: Connecticut Town name and number; Connecticut stream name and number; Basin name and number; Zip code. }
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 18635
Back to Top
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: Lambert Conformal Conic
Lambert_Conformal_Conic:
Lambert Conformal Conic
Standard_Parallel: 41.200000
Standard_Parallel: 41.866667
Longitude_of_Central_Meridian: -72.750000
Latitude_of_Projection_Origin: 40.833333
False_Easting: 999999.999996
False_Northing: 499999.999998
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.000328
Ordinate_Resolution: 0.000328
Planar_Distance_Units: survey feet
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_Resolution: 1.000000
Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates
Back to Top
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: BFE
Entity_Type_Definition:
Base Flood Elevation Lines. See http://www.cteco.uconn.edu/metadata/fema/document/frm_selected_pages_from_Appendix_L.pdf for attribute definitions.
Entity_Type_Definition_Source:
Federal Emergency Management Agency
Attribute:
Attribute_Label: OBJECTID
Attribute_Definition:
Internal feature number.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: BFE_LN_ID
Attribute:
Attribute_Label: ELEV
Attribute:
Attribute_Label: LEN_UNIT
Attribute:
Attribute_Label: V_DATUM
Attribute:
Attribute_Label: SOURCE_CIT
Attribute:
Attribute_Label: Shape
Attribute_Definition:
Feature geometry.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Coordinates defining the features.
Attribute:
Attribute_Label: Shape.len
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:
Appendix L of FEMA's Guidelines and Specifications for FEMA Flood Hazard Mapping Partners contains a detailed description of each attribute code and a reference to other relevant information.
Entity_and_Attribute_Detail_Citation:
The following tables are included in this data set: l_comm_info l_mt1_lomc l_stn_start study_info s_bfe s_cbrs s_base_index s_firm_pan s_fld_haz_ar s_fld_haz_ln s_gen_struct s_label_pt s_label_ld s_perm_bmk s_pol_ar s_pol_ln s_quad_index s_wtr_ln s_xs
Back to Top
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: FEMA, Map Service Center
Contact_Address:
Address_Type: mailing address
Address:
P.O. Box 1038
City: Jessup
State_or_Province: Maryland
Postal_Code: 20794-1038
Country: USA
Contact_Voice_Telephone: 1-800-358-9616
Contact_Electronic_Mail_Address: http://www.fema.gov/msc
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.
Resource_Description: DFIRM_S_BFE
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. FEMA will warrant the delivery of this product in a computer-readable format, and will offer appropriate adjustment of credit when the product is determined unreadable by correctly adjusted computer input peripherals, or when the physical medium is delivered in damaged condition. Requests for adjustment of credit must be made within 90 days from the date of this shipment from the ordering site.
Back to Top
Metadata_Reference_Information:
Metadata_Date: 20111227
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Federal Emergency Management Agency
Contact_Person: MipHelp (subsequently modified by Howie Sternberg, CT DEEP, to describe the Connecticut DFIRM data based on the county-level DFIRM database)
Contact_Address:
Address_Type: mailing address
Address:
500 C Street, s.w
City: Washington
State_or_Province: District of Columbi
Postal_Code: 1-877-336-2627
Country: USA
Contact_Voice_Telephone: 1-877-336-2627
Contact_Electronic_Mail_Address: miphelp@riskmapcds.com
Hours_of_Service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time
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. No restrictions or legal prerequisites for accessing the metadata.
Metadata_Use_Constraints:
None. No restrictions or legal prerequisites for using the metadata after access is granted.
Metadata_Security_Information:
Metadata_Security_Classification_System: None
Metadata_Security_Classification: None
Metadata_Security_Handling_Description:
No restrictions for handling the metadata.
Metadata_Extensions:
Online_Linkage: http://hazards.fema.gov
Online_Linkage: http://www.epsg.org
Profile_Name: FEMA NFIP Metadata Content and Format Standard
Metadata_Extensions:
Online_Linkage: http://www.esri.com/metadata/esriprof80.html
Profile_Name: ESRI Metadata Profile
Back to Top