DIGITAL FLOOD INSURANCE RATE MAP DATABASE, JEFFERSON COUNTY, ILLINOIS USA

Dataset Identification:

Resource Abstract:
The Digital Flood Insurance Rate Map (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 UTM 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.
Citation
Title DIGITAL FLOOD INSURANCE RATE MAP DATABASE, JEFFERSON COUNTY, ILLINOIS USA
publication  Date   2010-09-17
presentationForm  FEMA-DFIRM-FINAL
cited responsible party - publisher
organisation Name  Federal Emergency Management Agency
Contact information
Address
, Washington, DC
cited responsible party - originator
organisation Name  Federal Emergency Management Agency
cited responsible party - originator
organisation Name  Federal Emergency Management Agency
cited responsible party -
organisation Name  
Contact information
Linkage for online resource
URL: http://www.msc.fema.gov/
Topic Category:  hydrology,environment,inlandWaters,structure,transportation,elevation
Keywords:
Theme keywords (theme):
DFIRM
FIRM
FEMA Flood Hazard Zone
DFIRM Database
Special Flood Hazard Area
Digital Flood Insurance Rate Map
CBRS
Coastal Barrier Resources System
Riverine Flooding
Coastal Flooding
NFIP
Base Flood Elevation
SFHA
Flood Insurance Rate Map
Floodway
thesaurus name >
Title FEMA NFIP Topic Category
Location keywords:
REGION 5
STATE IL
COUNTY Jefferson
COUNTY-FIPS 0081
COMMUNITY Jefferson County
FEMA-CID 17081C
thesaurus name >
Title Geographic Names Information System
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.
Resource language:  eng; USA
Resource progress code:  completed
Resource Maintenance Information
maintenance or update frequency:  unknown
Constraints on resource usage:
Constraints
Use limitation statement:
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.
Constraints on resource usage:
Legal Constraints
use constraint:  otherRestrictions
Other constraints
Use Constraints: The hardcopy FIRM and DFIRM maps 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 match 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.
Constraints on resource usage:
Legal Constraints
Access Constraints  otherRestrictions
Other constraints
Access Constraints: None
Spatial representation type code:  vector
Processing environment:  Native Dataset Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722
Resource extent
Geographic Extent
Geographic Bounding Box
westBoundLongitude  -89.5
eastBoundLongitude  -88.4
northBoundLatitude  38.7
southBoundLatitude  37.9
Temporal Extent
2010-09-17
point of contact - pointOfContact
organisation Name  Federal Emergency Management Agency
position Name Federal Insurance and Mitigation Administration
Contact information
Telephone
Voice 1-800-358-9616
Address
500 C Street, S.W., Washington, District of Columbia, 20472 Country USA
electronic Mail Address http://www.msc.fema.gov/
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geometric Object Type  G-POLYGON STRING ENTITY POINT
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Content information: feature catalog description

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Scope of quality information
scope level  dataset
Resource lineage description
source
source description  Source Contribution: Spatial feature and attribute informationSource Type online
representative resolution scale:
Scale denominator: 24000
source citation
Title USGS 7.5-Minute Series Topographic Maps
publication  Date   1989-01-01
presentationForm  RASTER
other Citation Details  USGS has mapped the county with 1:24,000 scale topographic maps (also referred to as 7.5-minute quadrangles). The entire county was mapped by the late 1980s.
cited responsible party - publisher
organisation Name  U.S. Geological Survey
Contact information
Address
, Reston, VA
cited responsible party - originator
organisation Name  U.S. Geological Survey
Resource extent
Temporal Extent
1989-01-01
source
source description  Source Contribution: Spatial feature and attribute informationSource Type CD
representative resolution scale:
Scale denominator: 12000
source citation
Title Digital Orthophoto Quadrangle
publication  Date   2005-01-01
presentationForm  RASTER
other Citation Details  The digital orthophoto quadrangle (DOQ) is a 1-meter ground resolution, quarter-quadrangle (3.75-minutes of latitude by 3.75-minutes of longitude) image cast on the Universal Transverse Mercator Projection (UTM) on the North American Datum of 1983 (NAD83). The imagery is based on panchromatic black and white (or color infra-red) NAPP or NAPP-like photography.
cited responsible party - publisher
organisation Name  U.S. Geological Survey
Contact information
Address
, Eros Data Center, Sioux Falls, SD
cited responsible party - originator
organisation Name  U.S. Geological Survey
Resource extent
Temporal Extent
2005-01-01
source
source description  Source Contribution: Spatial feature and attribute information for permanent benchmarks.Source Type online
representative resolution scale:
Scale denominator: 12000
source citation
Title Permanent Benchmark Data Sheets
publication  Date   2002-01-01
presentationForm  VECTOR
other Citation Details  Geodetic data comprise the results of geodetic surveys to determine among other things, latitude, longitude, height, scale, and orientation control. The NGS' final product is the geodetic data sheet. Geodetic data sheets are comprehensive summaries of all the published information for a given geodetic reference point, including: the geographic position and/or height based on the current reference datum, condition of the survey mark when it was last visited, a description of where the point is located and how to reach it, and an explanation of the terms used in the data sheet. Points were downloaded from the NGS database and then sorted by the Illinois State Water Survey.
cited responsible party - publisher
organisation Name  National Geodetic Survey
Contact information
Address
, Silver Spring, MD
cited responsible party - originator
organisation Name  National Geodetic Survey
Resource extent
Temporal Extent
2002-01-01
source
source description  Source Contribution: Location and attribute information for municipal boundaries.Source Type online
representative resolution scale:
Scale denominator: 100000
source citation
Title ILLINOIS DEPARTMENT OF REVENUE MUNICIPAL BOUNDARIES 2005
publication  Date   2005-01-01
presentationForm  VECTOR
other Citation Details  The Illinois State Water Survey modified the boundaries received from the Illinois Department of Revenue to better fit the DOQ basemap. Boundaries were modified to be more accurate at 1:24,000 scale.
cited responsible party - publisher
organisation Name  Illinois Department of Revenue
Contact information
Address
, Springfield, IL
cited responsible party - originator
organisation Name  Illinois Department of Revenue
Resource extent
Temporal Extent
2005-01-01
source
source description  Source Contribution: Spatial feature and attribute information for municipal boundaries, streams, and flood hazard features.Source Type online
representative resolution scale:
Scale denominator: 100000
source citation
Title DATA RECEIVED FROM JEFFERSON COUNTY
publication  Date   2008-01-01
presentationForm  VECTOR
cited responsible party - publisher
organisation Name  Jefferson County
Contact information
Address
, Jefferson County, IL
cited responsible party - originator
organisation Name  Jefferson County
Resource extent
Temporal Extent
2008-01-01
source
source description  Source Contribution: Spatial feature and attribute information for municipal boundaries, streams, and flood hazard features.Source Type online
representative resolution scale:
Scale denominator: 100000
source citation
Title DATA RECEIVED FROM CITY OF MOUNT VERNON ENGINEERING OFFICE, JEFFERSON COUNTY, ILLINOIS
publication  Date   2008-01-01
presentationForm  VECTOR
cited responsible party - publisher
organisation Name  Mt Vernon IL
Contact information
Address
, Mt Vernon IL
cited responsible party - originator
organisation Name  Mt Vernon IL
Resource extent
Temporal Extent
2008-01-01
source
source description  Source Contribution: Spatial and attribute information for flood hazard features.Source Type Paper
representative resolution scale:
Scale denominator: 6000
source citation
Title CITY OF MOUNT VERNON, ILLINOIS, JEFFERSON COUNTY
publication  Date   1984-02-15
presentationForm  mapDigital
cited responsible party - publisher
organisation Name  Federal Emergency Management Agency Online Linkage: http://www.msc.fema.gov/
Contact information
Address
, Washington, DC
cited responsible party - originator
organisation Name  Federal Emergency Management Agency
Resource extent
Temporal Extent
1984-02-15
source
source description  Source Contribution: Spatial and attribute information for flood hazard features.Source Type Paper
representative resolution scale:
Scale denominator: 12000
source citation
Title VILLAGE OF BLUFORD, ILLINOIS, JEFFERSON COUNTY
publication  Date   1977-07-22
presentationForm  mapDigital
cited responsible party - publisher
organisation Name  Federal Emergency Management Agency Online Linkage: http://www.msc.fema.gov/
Contact information
Address
, Washington, DC
cited responsible party - originator
organisation Name  Federal Emergency Management Agency
Resource extent
Temporal Extent
1977-07-22
source
source description  Source Contribution: Spatial and attribute information for flood hazard features.Source Type Paper
representative resolution scale:
Scale denominator: 12000
source citation
Title JEFFERSON COUNTY, ILLINOIS, UNINCORPORATED AREAS
publication  Date   1977-03-04
presentationForm  mapDigital
cited responsible party - publisher
organisation Name  Federal Emergency Management Agency Online Linkage: http://www.msc.fema.gov/
Contact information
Address
, Washington, DC
cited responsible party - originator
organisation Name  Federal Emergency Management Agency
Resource extent
Temporal Extent
1977-03-04
source
source description  Source Contribution: Spatial and attribute information for flood hazard features.Source Type Paper
representative resolution scale:
Scale denominator: 12000
source citation
Title CITY OF MOUNT VERNON, ILLINOIS, JEFFERSON COUNTY
publication  Date   1984-02-15
presentationForm  mapDigital
cited responsible party - publisher
organisation Name  Federal Emergency Management Agency Online Linkage: http://www.msc.fema.gov/
Contact information
Address
, Washington, DC
cited responsible party - originator
organisation Name  Federal Emergency Management Agency
Resource extent
Temporal Extent
1984-02-15
source
source description  Source Contribution: Spatial and attribute information for flood hazard features.Source Type Paper
representative resolution scale:
Scale denominator: 12000
source citation
Title VILLAGE OF BONNIE, ILLINOIS, JEFFERSON COUNTY
publication  Date   1985-08-19
presentationForm  mapDigital
cited responsible party - publisher
organisation Name  Federal Emergency Management Agency Online Linkage: http://www.msc.fema.gov/
Contact information
Address
, Washington, DC
cited responsible party - originator
organisation Name  Federal Emergency Management Agency
Resource extent
Temporal Extent
1985-08-19
source
source description  Source Contribution: Spatial and attribute information for flood hazard features.Source Type Paper
representative resolution scale:
Scale denominator: 12000
source citation
Title CITY OF MOUNT VERNON, ILLINOIS, JEFFERSON COUNTY
publication  Date   1983-08-15
presentationForm  documentDigital
cited responsible party - publisher
organisation Name  Federal Emergency Management Agency Online Linkage: http://www.msc.fema.gov/
Contact information
Address
, Washington, DC
cited responsible party - originator
organisation Name  Federal Emergency Management Agency
Resource extent
Temporal Extent
1983-08-15
source
source description  Source Contribution: Spatial and attribute information for flood hazard features.Source Type Paper
representative resolution scale:
Scale denominator: 24000
source citation
Title DFIRM/FIS - JEFFERSON COUNTY, ILLINOIS, AND INCORPORATED AREAS - PRELIM
publication  Date   2010-09-17
presentationForm  mapDigital
cited responsible party - publisher
organisation Name  Federal Emergency Management Agency Online Linkage: http://www.msc.fema.gov/
Contact information
Address
, Washington, DC
cited responsible party - originator
organisation Name  Federal Emergency Management Agency
Resource extent
Temporal Extent
2010-09-17
AbsoluteExternalPositionalAccuracy
name Of Measure Horizontal Positional Accuracy Report
evaluation Method Description  The DFIRM Database consists of countywide vector files and associated attributes produced in conjunction with the hard copy FEMA FIRMs. 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. 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.
AbsoluteExternalPositionalAccuracy
name Of Measure Vertical Positional Accuracy Report
evaluation Method Description  The DFIRM Database consists of countywide vector files and associated attributes produced in conjunction with the hard copy FEMA FIRMs. 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.
Completeness Commission
evaluation Method Description  The 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.
Completeness Omission
evaluation Method Description  The 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.
ConceptualConsistency
measure Description  When FEMA revises an FIS, adjacent studies are checked to ensure agreement between flood elevations at the boundaries of the studies. 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.

Resource distribution information

Distributor
distributor contact - distributor
organisation Name  FEMA, Map Service Center
Contact information
Telephone
Voice 1-800-358-9616
Address
P.O. Box 1038, Jessup, Maryland, 20794-1038 Country USA
electronic Mail Address http://www.msc.fema.gov/
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.
Standard ordering process
fees no charge
Format
Format name ARCE
Format version 
Digital Transfer Options
Linkage for online resource
URL: http://www.msc.fema.gov/

Metadata data stamp:  2010-09-17
Resource Maintenance Information
maintenance or update frequency:  annually
notes: This metadata was automatically generated from the FGDC Content Standards for Digital Geospatial Metadata standard (version FGDC-STD-001-1998) using the 2012-06-20T17:21:00 version of the FGDC RSE to ISO 19115-2 transform.
Metadata contact - pointOfContact
individual Name Unknown
organisation Name  FEMA, Map Service Center
Contact information
Telephone
Voice 1-800-358-9616
Address
500 C Street, S.W., Washington, District of Columbia, 20472 Country USA
electronic Mail Address http://www.msc.fema.gov/
Metadata scope code  dataset
Metadata language  eng; USA
Metadata character set encoding:   utf8
Metadata standard for this record:  ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
standard version:  ISO 19115-2:2009(E)
Metadata record identifier:  c2f7b7bc-1016-436f-a916-6eba50e4a0df

Metadata record format is ISO19139-2 XML (MI_Metadata)