rr_fema

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator:

The original Q3 Flood Data layer was developed as a coverage named fema by Federal Emergency Management Agency. Rr_fema.shp was created by Circuit Rider Productions, Inc. Rr_fema represents the portion of the Q3 Flood Data within the Russian River basin. Polygon features from the original source data were selected based on their spatial location within the extent of the Russian River basin. This metadata file incorporates information that is specific to this layer as well as information that is available in the original metadata file for the Q3 Flood Data layer (c06097m.meta and c06045m.meta). The portions of this metadata file that borrow text from c06097m.meta and c06045m.meta are indicated in quotation marks.

Publication_Date:

1996

Title: rr_fema

Geospatial_Data_Presentation_Form: vector digital data

Online_Linkage: \\GIS_TECH\rrgis\Management\rr_fema.shp

Description:

Abstract:

"The Q3 Flood Data are derived from the Flood Insurance Rate Maps
(FIRMS) published by the Federal Emergency Management Agency (FEMA). The
file is georeferenced to earth"s surface using geographic projection
and decimal degree coordinate system. The specifications for the
horizontal control of Q3 Flood Data files are consistent with those
required for mapping at a scale of 1:24000."

Purpose:

"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
puchase 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 1973 Flood Disaster Protection
Act). In addition to the identification of Special Flood Hazard Areas,
the risk zones shown on the FIRMs are the basis for the establishment of
premium rates for flood coverage offered through the NFIP.
Q3 Flood Data files are intended to convey certain key features from the
existing hard copy FIRM to provide users with automated flood risk data.
Edge-matching errors, overlaps and deficiencies in coverage, and similar
problems are not corrected during digitizing or post-processing.
These data may be used to locate Special Flood Hazard Areas (SFHAs).
More detailed information may be obtained from the paper FIRM."

Supplemental Information:

"Process Description: Q3 Flood Data format was produced by either
scanning or manually digitizing a hardcopy version of the graphic
materials. The scanning process captured the digital data and the
resulting raster data was vectorized and attributed on an
interactive editing station. Manual digitizing used a digitizing
table to capture the digital data; attribution was performed either
as the data was digitized or on an interactive edit station after
the digitizing was completed. The determination of the production
methodology was based on various criteria, including availability of
production systems. Four control points corresponding to the four
corners of the map were used for registration during manual
digitizing. A projection transformation was performed on the
coordinates used in the data collection and editing systems to
register the digital data to the Universal Transverse Mercator (UTM)
grid coordinates. The ARC/INFO coverage of the Q3 Flood Data was
generated, and it was also used to create the Q3-DLG file. The Q3
Flood Data was checked for position and attribute accuracy by
comparing plots of the digital data to the graphic source and by
symbolizing display on an interactive computer graphic system.
Selected attributes that could not be visually verified were
individual queried. In addition, an ARC/INFO Arc Macro Language
(AML) software program was applied to the dataset to test the
attributes against a master set of valid attributes for the specific
data category and a complete set of valid attribute combinations.
Source graphics were revised to reflect updates effected by Letters
of Map Change (Letter of Map Revision (LOMR), Letter of Map
Amendment (LOMA)). These revisions were included in the Q3 Flood
Data if they were mappable at the publication scale of the source
graphic. Once final, the ARC/INFO coverage was projected into a
geographic grid system using decimal degree latitude and longitude
coordinates and then converted into an ARC/INFO export file and
MapInfo native table files. In addition, the ARC/INFO coverage in
UTM coordinates was converted into a Digital Line Graph file. All
final files were checked for logical consistency and completeness."

 

"Completeness_Report: Data completeness for Q3 Flood Data files reflect the
content of the source graphic. Features may have been eliminated or
generalized on the source graphic, due to scale and legibility
constraints. 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 analysis 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 anaylses are used to generate
flood risk data only for developed or developing areas of communities.
For undeveloped 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.
The Q3 Flood Data coverages may be derived from DFIRM-DLGs, from FIRM-
DLGs, from FIRMs digitized previously for emergency applications, or may
be newly created files. In Q3 Flood Data derived from older data sets,
certain items may not have been captured or may have been captured
differently from the current Q3 Flood Data specifications. In some cases,
preliminary FIRM data have been included in the Q3 Flood Data files.
These data have been provided to the community for their review and
comment and may be subject to change before their final publication date.
In addition, in some cases areas designated as Flood Prone Areas on
maps prepared by USGS and FIA have been included in the Q3 Flood Data
files. These areas were delineated based on available information on past
floods and are described by a unique attribute code that distinquishes
them from areas of 1% annual chance of flooding derived from FIRMs.
Flood Insurance Rate Maps continually undergo revisions and updates.
Some of these revisions are effected by letter (Letter of Map Revision
(LOMR), Letter of Map Amendment (LOMA)). Q3 Flood Data may not reflect
the most current information or information that is not mappable at the
publication scale of FIRM. To obtain the latest information, contact
the address listed under distributor.

Positional_Accuracy
Horizontal_Positional_Accuracy
Horizontal_Positional_Accuracy_Report: Specifications for the digitizing
of FIRMs to create the Q3 Flood Data are consistent with those
requirements for mapping at a scale of 1:24000. Horizontal control of
Q3 Flood Data was established using USGS quadrangle maps at 1:24000 or
other standard scales. Users should assess the horizontal positional
sources and the requirements of their application. With increased
frequency, large-scale spatial data sets are becoming widely available
for computer-based geographic information systems. Q3 Flood Data may be
used in combination with other digital spatial data, however, users
should be aware that scalar enlargements do not enhance the relative
accuracy of the Q3 Flood Data (i.e. 1:24000)."

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date:

1996

Currentness_Reference:

Publication date of sources

Status:

Progress: Complete

Maintenance_and_Update_Frequency:

none scheduled

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -123.387866

East_Bounding_Coordinate: -122.522658

North_Bounding_Coordinate: 39.399217

South_Bounding_Coordinate: 38.298024

Keywords:

Theme:

Theme_Keyword_Thesaurus:

REQUIRED: Reference to a formally registered thesaurus or a similar authoritative source of theme keywords.

Theme_Keyword:

FEMA Flood Hazard Zones, Q3 Flood Data, Q3 Coverage, Special Flood Hazard Areas, Digital Flood Insurance Rate Maps, Russian River, Watershed, Mendocino county, Sonoma county

Access_Constraints:

none

Use_Constraints:

The responsibility of the risks associated in regards to the results and representations of using this type of spatial data is understood by the user. In all cases, the user should refer to the associated metadata files or the original source data for accuracy, currentness and appropriate contact information. CRP shall not have any liability to any person or entity with respect to liability, loss or damage caused or alleged to be caused directly or indirectly by information contained in this file.

For detailed information describing the original source data from which this layer was developed, refer to the original source data metadata file, c06097m.meta and c06045m.meta. This metadata file is available from...

Native_Data_Set_Environment:

Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 2; ESRI ArcCatalog 8.2.0.700

Data_Quality_Information:

Lineage:

Process_Step:

Process_Description: Dataset copied.

Source_Used_Citation_Abbreviation: C:\GIS_Data\RRGIS\FEMA\rr_fema

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: 1568

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator

Universal_Transverse_Mercator:

UTM_Zone_Number: 10

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.999600

Longitude_of_Central_Meridian: -123.000000

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: 0.000256

Ordinate_Resolution: 0.000256

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

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: rr_fema

Attribute:

Attribute_Label: FID

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: Shape

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: AREA - Area of polygon/region in square coverage units

Attribute:

Attribute_Label: PERIMETER - Perimeter of poly/region in coverage units

Attribute:

Attribute_Label: FIPS - Standard 5-digit State and County FIPS codes

Attribute:

Attribute_Label: COMMUNITY - Identifies a county, city, or other community
responsible for floodplain management. Numeric value assigned by FEMA.

Attribute:

Attribute_Label: FIRM_PANEL - Eleven-digit code identifies portion of community covered or not covered by FIRM panel.

Attribute:

Attribute_Label: QUAD - USGS quadrangle identifier

Attribute:

Attribute_Label: ZONE - Flood hazard zone designation

Attribute:

Attribute_Label: FLOODWAY -Channel, river, or watercourse reserved for discharge.

Attribute:

Attribute_Label: COBRA - Undeveloped Coastal Barrier Resources Act area - no
flood insurance available.

Attribute:

Attribute_Label: SFHA - In/Out of flood zone designation

Attribute:

Attribute_Label: SYMBOL - Polygon shade symbols for graphic output

Attribute:

Attribute_Label: PANEL_TYP - Type of FIRM panel represented

Attribute:

Attribute_Label: ST_FIPS - State FIPS code

Attribute:

Attribute_Label: CO_FIPS - County FIPS code

Attribute:

Attribute_Label: STATE - State FIPS code

Attribute:

Attribute_Label: PCOMM - FIRM Community/County Identifier

Attribute:

Attribute_Label: PANEL - FIRM Panel number and suffix (key to RFIRM files)

Attribute:

Attribute_Label: LAT - Origin latitude (degrees) of 7.5 minute quadrangle

Attribute:

Attribute_Label: LONG - Origin longitude (degrees) of 7.5 minute quadrangle

Attribute:

Attribute_Label: QUAD_UNIT - Index number to 7.5 minute quadrangle

Attribute:

Attribute_Label: ID

Distribution_Information:

Resource_Description: Downloadable Data

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Transfer_Size: 3.170

Metadata_Reference_Information:

Metadata_Date: 20020919

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

Circuit Rider Productions, Inc.

Contact_Person: David Bennett

Contact_Address:

Address_Type:

9619 Old Redwood Highway

City: Windsor

State_or_Province: California

Postal_Code: 95492

Contact_Voice_Telephone:

(707)838-6641

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time

Metadata_Extensions:

Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>

Profile_Name: ESRI Metadata Profile