Flood_Zones

Identification Information

Citation Information

Originator

Federal Emergency Management Agency

Publication Date

20110616

Title

Flood_Zones

Geospatial Data Presentation Form

vector digital data

Publication Place

Washington, DC

Publisher

Federal Emergency Management Agency

Other Citation Details

Metadata_File_Name: 23011C_20110616_metadata.xml

Citation Information

Originator	Federal Emergency Management Agency
Publication Date	20110616
Title	FEMA CASE 06-01-B023S

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 1:12000.

Purpose

This dataset REPLACES Oxford County and Kennebec County items in Firm with new regulatory zones.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 insurance 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.

Time Period of Content

Calendar Date	20110616
Currentness Reference	FIRM and FIS Effective Date

Status

Progress	Complete
Maintenance and Update Frequency	Unknown

Bounding Coordinates

West Bounding Coordinate	-71.085424
East Bounding Coordinate	-69.367770
North Bounding Coordinate	45.364753
South Bounding Coordinate	43.783852

Keywords

Theme	Hydrology, Environment, Inland Waters, Structure, Transportation, Elevation (ISO 19115 Topic Category)
Theme	FEMA Flood Hazard Zone, DFIRM Database, DFIRM, Special Flood Hazard Area, Digital Flood Insurance Rate Map, Riverine Flooding, NFIP, Base Flood Elevation, SFHA, Flood Insurance Rate Map, FIRM, Floodway (FEMA NFIP Topic Category)
Place	REGION 01, STATE ME, COUNTY KENNEBEC, COUNTY-FIPS 011, COMMUNITY KENNEBEC COUNTY, FEMA-CID 23011C, COUNTY OXFORD (None)

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 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.

Contact Organization

Federal Emergency Management Agency

Contact Position

Federal Insurance and Mitigation Administration

Address Type

mailing

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

Native Data Set Environment

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.4000

Citation Information

Originator	Federal Emergency Management Agency
Publication Date	20110616
Title	Flood Insurance Rate Map, KENNEBEC COUNTY, OXFORD COUNTY, MAINE (ALL JURISDICTIONS)
Geospatial Data Presentation Form	map
Publication Place	Washington, DC
Publisher	Federal Emergency Management Agency
Online Linkage	http://www.fema.gov/msc

Citation Information

Originator	Federal Emergency Management Agency
Publication Date	20110616
Title	Flood Insurance Study, KENNEBEC COUNTY, OXFORD COUNTY, MAINE (ALL JURISDICTIONS)
Geospatial Data Presentation Form	document
Publication Place	Washington, DC
Publisher	Federal Emergency Management Agency
Online Linkage	http://www.fema.gov/msc

Citation Information

Originator	Federal Emergency Management Agency
Publication Date	20110616
Title	Raster DFIRM, KENNEBEC COUNTY, OXFORD COUNTY, MAINE (ALL JURISDICTIONS)
Geospatial Data Presentation Form	raster digital data
Publication Place	Washington, DC
Publisher	Federal Emergency Management Agency
Online Linkage	http://www.fema.gov/msc

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.

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 Report

Citation Information

Originator	MAINE GIS (MeGIS)
Publication Date	2005
Title	Data supplied by the State of Maine (transportation, political boundaries, hydro features)
Geospatial Data Presentation Form	Vector Digital Data
Publication Place	ME
Publisher	Maine GIS Department (MeGIS)
Other Citation Details	NA

Source Scale Denominator

6000

Type of Source Media

online

Calendar Date

2005

Source Currentness Reference

publication date

Source Citation Abbreviation

BASE1

Source Contribution

Spatial and attribute information for transportation lines,political boundaries, hydro features and aerial imagery.

Citation Information

Originator	National Geodetic Survey
Publication Date	2002
Title	National Geodetic Survey Benchmarks
Geospatial Data Presentation Form	Vector Digital Data
Publication Place	Silver Spring, MD
Publisher	National Geodetic Survey
Other Citation Details	NA

Source Scale Denominator

120000

Type of Source Media

online

Calendar Date

2002

Source Currentness Reference

publication date

Source Citation Abbreviation

BASE2

Source Contribution

Spatial and attribute information for permanent benchmarks

Citation Information

Originator	Federal Emergency Management Agency
Publication Date	19940615
Title	Flood Insurance Study, KENNEBEC COUNTY, MAINE
Geospatial Data Presentation Form	paper
Publication Place	Washington, DC
Publisher	Federal Emergency Management Agency
Other Citation Details	NA

Source Scale Denominator

12000

Type of Source Media

paper

Calendar Date

19940615

Source Currentness Reference

Effective Date

Source Citation Abbreviation

FIS1

Source Contribution

Spatial and attribute information for base flood elevations, general structures, profile baselines, and cross sections.

Citation Information

Originator	USGS
Publication Date	1989
Title	USGS 7.5 Minute Quad Index
Geospatial Data Presentation Form	paper
Publication Place	Reston, VA
Publisher	USGS
Other Citation Details	NA

Source Scale Denominator

24000

Type of Source Media

online

Calendar Date

1989

Source Currentness Reference

publication date

Source Citation Abbreviation

STUDY1

Source Contribution

Spatial and attribute information for Quad Index and Firm Panel Index.

Citation Information

Originator	Federal Emergency Management Agency
Publication Date	2010
Title	FEMA Letter of Map Revisions
Geospatial Data Presentation Form	paper
Publication Place	Washington, DC
Publisher	Federal Emergency Management Agency
Other Citation Details	NA

Source Scale Denominator

6000

Type of Source Media

online

Calendar Date

2010

Source Currentness Reference

publication date

Source Citation Abbreviation

LOMC1

Source Contribution

Spatial and attribute information for flood hasard boundaries, cross sections, bfe's and general structres

Process Description

The DFIRM Database is compiled in conjunction with the hardcopy FIRM and the final FIS report. The specifics of the hydrologic and hydraulic analyses performed are detailed in the FIS report. The results of these studies are submitted in digital format to FEMA. These data and unrevised data from effective FIRMs are compiled onto the base map used for DFIRM publication and checked for accuracy and compliance with FEMA standards.

Source Used Citation Abbreviation

BASE1

Source Used Citation Abbreviation

BASE2

Source Used Citation Abbreviation

FIS1

Source Used Citation Abbreviation

STUDY1

Source Used Citation Abbreviation

LOMC1

Process Date

20110616

Process Description

Deleted unwanted columns from original data and appended Kennebec and Oxford County data together.

Process Date

20120319

Process Time

14230400

Contact Organization

Maine Office of GIS

Address Type

mailing address

Address

State House Station 174

City

Augusta

State or Province

Postal Code

04333

Country

USA

Contact Voice Telephone

207 624-7700

Contact Facsimile Telephone

207 287-3842

Direct Spatial Reference Method

Vector

Point and Vector Object Information

Planar Coordinate Encoding Method

coordinate pair

Abscissa Resolution

0.000100

Ordinate Resolution

0.000100

Planar Distance Units

meters

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

Altitude Datum Name

North American Vertical Datum of 1988

Altitude Resolution

1.000000

Altitude Distance Units

Survey Feet

Altitude Encoding Method

Explicit elevation coordinate included with horizontal coordinates

Entity Type Label

Flood_Zones

Entity Type Definition

Location and attributes for a tiling index for raster data used for DFIRM

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)

Attribute Label

OBJECTID

Attribute Definition

Internal feature number.

Attribute Definition Source

ESRI

Unrepresentable Domain

Sequential unique whole numbers that are automatically generated.

Beginning Date of Attribute Values

Attribute Label

FLD_ZONE

Attribute Definition

Flood Zone. This is the flood zone designation. These zones are used by FEMA to designate the SFHA and for insurance rating purposes.

Attribute Definition Source

FEMA FIRM

Enumerated Domain Value

Zone A

Enumerated Domain Value Definition

An area inundated by 100-year flooding, for which no Base Flood Elevations (BFES) have been determined; IN Special Flood Hazard Area (SFHA).

Enumerated Domain Value

Zone AE

Enumerated Domain Value Definition

An area inundated by 100-year flooding, for which Base Flood Elevations (BFES) have been determined; IN Special Flood Hazard Area (SFHA).

Enumerated Domain Value

Zone AO

Enumerated Domain Value Definition

An area inundated by 100-year flooding (usually sheet flow on sloping terrain), for which average depths have been determined; flood depths range from 1 to 3 feet; IN Special Flood Hazard Area (SFHA).

Enumerated Domain Value

Zone AH

Enumerated Domain Value Definition

An area inundated by 100-year flooding (usually an area of ponding), for which Base Flood Elevations have been determined; flood depths range from 1 to 3 feet; IN Special Flood Hazard Area (SFHA).

Enumerated Domain Value

Zone VE

Enumerated Domain Value Definition

An area inundated by 100-year flooding with velocity hazard (wave action); Base Flood Elevations (BFES) have been determined; IN Special Flood Hazard Area (SFHA).

Enumerated Domain Value

0.2 Percent Annual Chance Flood Hazard

Enumerated Domain Value Definition

Zone X500 is the 0.2 Percent Annual Chance Flood Hazard. An area inundated by 500-year flooding; an area inundated by 100-year flooding with average depths of less than 1 foot or with drainage areas less than 1 square mile; or an area protected by levees from 100-year flooding; OUT Special Flood Hazard Area (SFHA).

Enumerated Domain Value

Zone X

Enumerated Domain Value Definition

An area that is determined to be outside the 100- and 500-year floodplains; OUT Special Flood Hazard Area (SFHA).

Beginning Date of Attribute Values

Attribute Label

FLOODWAY

Attribute Definition

channel, river or watercourse reserved for flood discharge

Attribute Definition Source

FEMA FIRM

Enumerated Domain Value

FLOODWAY

Enumerated Domain Value Definition

An area that includes the channel of a river or other watercourse and the adjacent land areas that must be reserved in order to discharge the base flood without cumulatively increasing the water-surface elevation by more than a designated height. (Note: this area is normally in Zone AE.)

Beginning Date of Attribute Values

Attribute Label

SFHA_TF

Attribute Definition

T/F flood zone designation indicates if the area is a Special Flood Hazard Area and corresponds to ZONE types

Enumerated Domain Value

Enumerated Domain Value Definition

area located within Special Flood Hazard Area (SFHA)

Enumerated Domain Value

Enumerated Domain Value Definition

area located outside of SFHA

Beginning Date of Attribute Values

Attribute Label

STATIC_BFE

Attribute Definition

Static Base Flood Elevation. This field will be populated for areas that have been determined to have a constant Base Flood Elevation over a flood zone. The BFE value will be shown beneath the zone label. In this situation the same BFE applies to the entire polygon. This normally occurs in lakes or coastal zones.

Beginning Date of Attribute Values

Attribute Label

V_DATUM

Attribute Definition

Vertical Datum. The vertical datum indicates the reference surface from which the flood elevations are measured, Normally this would be North American Vertical Datum of 1988 for new studies. This field is only populated if the STATIC_BFE field is populated.

Beginning Date of Attribute Values

Attribute Label

LEN_UNIT

Attribute Definition

Length Units. This unit indicated the measurement system used for the BFE's and/or depths. Normally this would be feet. This field is only populated if the STATIC_BFE or DEPTH field is populated.

Beginning Date of Attribute Values

Attribute Label

SOURCE_CIT

Attribute Definition

Source Citation. Abbreviations used describe the source information.

Enumerated Domain Value

FIRM

Enumerated Domain Value Definition

Flood Insurance Rate Map

Enumerated Domain Value

FIS1

Enumerated Domain Value Definition

Flood Insurance Study

Enumerated Domain Value

LOMC

Enumerated Domain Value Definition

Letter Of Map Change

Enumerated Domain Value

LOMC1

Enumerated Domain Value

STUDY1

Enumerated Domain Value Definition

Flood Insurance Study Volume One

Enumerated Domain Value

STUDY3

Enumerated Domain Value Definition

Flood Insurance Study Volume Three

Beginning Date of Attribute Values

Attribute Label

COUNTY

Beginning Date of Attribute Values

Attribute Label

Shape

Attribute Definition

Feature geometry.

Attribute Definition Source

ESRI

Unrepresentable Domain

Coordinates defining the features.

Beginning Date of Attribute Values

Attribute Label

Shape_area

Attribute Definition

Area of feature in internal units squared.

Attribute Definition Source

ESRI

Unrepresentable Domain

Positive real numbers that are automatically generated.

Beginning Date of Attribute Values

Attribute Label

Shape_len

Beginning Date of Attribute Values

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. The following tables are included in this data set: L_Comm_Info L_Stn_Start S_Base_Index S_BFE S_FIRM_Pan S_Fld_Haz_Ar S_Fld_Haz_Ln S_Gen_Struct S_Label_Ld S_Label_Pt S_Perm_Bmk S_Pol_Ar S_Pol_Ln S_Quad_Index S_Trnsport_Ln S_Wtr_Ar S_Wtr_Ln S_XS Study_Info

Entity and Attribute Overview

Entity and Attribute Detail Citation

Contact Organization

Maine Office of GIS

Address Type

mailing address

Address

House Station 174

City

Augusta

State or Province

Maine

Postal Code

04333

Country

USA

Contact Voice Telephone

207 624-7700

Contact Facsimile Telephone

207 287-3842

Hours of Service

Monday through Friday 0800 - 1700 EST

Resource Description

Downloadable Data

Distribution Liability

Users must assume responsibility to determine the usability of this data for their purposes. Although these data have been processed successfully on a computer system at the Maine Office of Geographic Information Systems, no warranty expressed or implied is made by MEGIS regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. Neither the Maine Office of Geographic Information Systems, nor any of its contributors, is liable for misuse of the data, for damage, for transmission of viruses, or for computer contamination through the distribution of these data sets.

Format Name

ESRI Shapefile

Format Version Number

ARC Version 9.x

Format Specification

MEGIS has made all vector layers, in the Maine GIS Internet Data Catalog, available in ESRI's ArcView shapefile format. A shapefile is a simple non-topological format that stores the geometry and attribute information for a set of geographic features as a set of vector (point, line, polygon) coordinates. Shapefiles draw quickly and directly in ArcView, ArcGIS, ArcExplorer. Shapefiles are a compatible data type for many other types of GIS software. Three files are fundamental to each shapefile: .shp stores the feature geometry (shape and location information); .shx stores the index of the feature geometry; .dbf a dBASE (TM) file stores the attribute information for the features. Other index files may be created to help speed analysis and query: these file formats are .sbn .sbx .ain .aix .fbn and .fbx. In addition you may find projection .prj, and metadata .xml, files associated with shapefiles.

File Decompression Technique

Data available from this website is in .zip compressed format. WinZip is a Windows based, PKZip-compatible compression utility. You will need a program like this to extract the data.

Network Resource Name

http://megis.maine.gov/catalog/

Fees

Data may be downloaded from Maine GIS Internet Data Catalog at no charge.

Turnaround

Data is available for immediate download from the Maine GIS Internet Data Catalog.

Format Name

ESRI Shapefile

Format Version Number

Offline Media

CD-ROM

Recording Format

ISO 9660

Fees

Contact Distributor

Metadata Reference Information

Metadata Date

20120329

Metadata Contact

Contact Person	FEMA Representative
Contact Organization	Federal Emergency Management Agency
Contact Position	Federal Insurance and Mitigation Administration
Address Type	mailing
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
Contact Instructions	None

Metadata Standard Name

FGDC Content Standards for Digital Geospatial Metadata

Metadata Standard Version

FGDC-STD-001-1998

Metadata Time Convention

local time

Online Linkage

http://hazards.fema.gov

Online Linkage

http://www.epsg.org

Profile Name

FEMA NFIP Metadata Content and Format Standard