DIGITAL FLOOD INSURANCE RATE MAP DATABASE, DESHA COUNTY, AR
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. This database was developed for the DESHA
County DFIRM project in 2007 by CF3R/Baker for FEMA Region 6.
Citation
Title DIGITAL FLOOD INSURANCE RATE MAP DATABASE, DESHA COUNTY, AR
publication Date
2012-06-19
presentationForm
FEMA-DFIRM-FINAL
cited responsible party
-
publisher
organisation Name
Federal Emergency Management Agency
Contact information
Address
, Washington, D.C.
cited responsible party
-
originator
organisation Name
Federal Emergency Management Agency
cited responsible party
-
originator
organisation Name
Federal Emergency Management Agency
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 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
Resource extent
Geographic Extent
Geographic Bounding Box
westBoundLongitude
-91.627185
eastBoundLongitude
-90.747137
northBoundLatitude
34.20057
southBoundLatitude
33.494704
Temporal Extent
2012-06-19
point of contact
-
pointOfContact
organisation Name
Federal Emergency Management Agency
Contact information
Telephone
Voice 1-800-358-9616
Address
500 C Street, S.W., Washington, District of Columbia, 20472
Country USA
source description
Source Contribution: Creates the FIRM panel index for the entire county.Source Type computer program
representative resolution scale:
Scale denominator: 24000
source citation
Title Panel Index
publication Date
2009-01-01
presentationForm
mapDigital
other Citation Details
Created from State-wide 1:24,000 Quadrangles for DESHA COUNTY, AR.
cited responsible party
-
publisher
organisation Name
Michael Baker Jr. ,Inc. 785 Greens Parkway, Suite 100, Houston, Texas, 77067
Contact information
Address
, Houston, TX
cited responsible party
-
originator
organisation Name
Michael Baker Jr.
Resource extent
Temporal Extent
2009-01-01
source
source description
Source Contribution: Bench mark locations for DESHA COUNTY, AR to be used in creating the S_PERM_BMK shapefile.Source Type
online
representative resolution scale:
Scale denominator: 24000
source citation
Title Geodetic Data
publication Date
1997-01-01
Edition Latest Available
presentationForm
POINT DIGITAL DATA
other Citation Details
For online computer and/or data base questions, contact George Frank, NGS Data Base Administrator, phone: 301-713-3251, fax:
301-713-4172, email: George.Frank@noaa.gov
cited responsible party
-
publisher
organisation Name
NOAA, National Geodetic Survey
Contact information
Address
, Silver Spring, MD
cited responsible party
-
originator
organisation Name
National Oceanic and Atmospheric Administration, National Geodetic Survey
cited responsible party
-
organisation Name
Contact information
Linkage for online resource
URL: <http://www.ngs.noaa.gov>
Resource extent
Temporal Extent
1918-01-01
1999-01-01
source
source description
Source Contribution: The location of streams and water body features to be used in creating the S_WTR_LN and S_WTR_AR shapefiles.Source
Type online
representative resolution scale:
Scale denominator: 24000
source citation
Title National Hydrography Dataset (NHD) - High-resolution - DESHA COUNTY, AR
publication Date
1999-01-01
presentationForm
mapDigital
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 (USGS) in cooperation with U.S. Environmental Protection Agency, USDA Forest Service, and other Federal,
State and local partners (see dataset specific metadata under Data_Set_Credit for details).
cited responsible party
-
organisation Name
Contact information
Linkage for online resource
URL: <http://nhd.usgs.gov>
Resource extent
Temporal Extent
2009-01-01
source
source description
Source Contribution: USGS Topographic Quadrangle series data used in creating the S_QUAD_INDEX shapefiles.Source Type online
representative resolution scale:
Scale denominator: 24000
source citation
Title 7.5' quadrangles for DESHA COUNTY, AR
publication Date
1999-01-01
presentationForm
mapDigital
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
2009-01-01
source
source description
Source Contribution: Aerial photography used in validating the S_Wtr_Ln and S_Trnsport_Ln shapefiles.Source Type online
representative resolution scale:
Scale denominator: 24000
source citation
Title Aerial Images for DESHA COUNTY, AR,USDA-FSA-APFO Digital Ortho Mosaic
publication Date
2006-10-06
presentationForm
mapDigital
cited responsible party
-
publisher
organisation Name
USDA_FSA_APFO Aerial Photography Field Office
Contact information
Address
, Salt Lake City, UT
cited responsible party
-
originator
organisation Name
USDA-FSA-APFO
Resource extent
Temporal Extent
2009-01-01
source
source description
Source Contribution: Political boundary files used to create the S_POL_AR and S_POL_LN shapefiles.Source Type online
representative resolution scale:
Scale denominator: 24000
source citation
Title Political Boundaries, Counties and Cities
publication Date
2005-01-01
presentationForm
mapDigital
other Citation Details
Phone:501.682.2767
cited responsible party
-
publisher
organisation Name
AGIO
Contact information
Address
, Little Rock, AR
cited responsible party
-
originator
organisation Name
Arkansas Geographic Information Office (AGIO)
source description
Source Contribution: Point location information to establish locations of Airports, Runways for DESHA COUNTY. To be used in
conjunction with Imagery to populate the Transportation Layer.Source Type online
representative resolution scale:
Scale denominator: 24000
source citation
Title AGIO Airports Location Data
publication Date
2004-01-01
presentationForm
DIGITAL POINT DATA
other Citation Details
Phone:501.682.2767
cited responsible party
-
publisher
organisation Name
AGIO
Contact information
Address
, Little Rock, AR
cited responsible party
-
originator
organisation Name
Arkansas Geographic Information Office (AGIO)
organisation Name
Federal Emergency Management Agency
Contact information
Address
, Washington, D.C.
cited responsible party
-
originator
organisation Name
Federal Emergency Management Agency
cited responsible party
-
organisation Name
Contact information
Linkage for online resource
URL: <http://www.fema.gov/msc>
Resource extent
Temporal Extent
2009-01-01
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 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.
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 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.
Completeness Commission
evaluation Method Description
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
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. 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.
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.
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 Mohamed Bagha, PE.
organisation Name
CF3R
position Name Water Resources Project Manager
Contact information
Telephone
Voice 281-539-7314
Fax 281-579-4646
Address
785 Greens Parkway, Suite 100, Houston, Texas, 77067
Country USA