Sierra County Special Flood Hazard Areas (SFHA)

Metadata from the RGIS Metadata Repository

Identification Information

Citation
Citation Information
Originator Earth Data Analysis Center
Publication Date 2013-12-04
Publication Time 14:22:39
Title Sierra County Special Flood Hazard Areas (SFHA)
Geospatial Data Presentation Form vector digital data
Publication Information
Publication Place Albuquerque, NM
Publisher Earth Data Analysis Center
Other Citation Details
Online Linkage http://rgis.unm.edu
Online Linkage https://gstore.unm.edu/apps/rgis/datasets/ce6994f8-d83a-472f-87fb-57b864653de5/sierraSFHA.original.zip
Online Linkage https://gstore.unm.edu/apps/rgis/datasets/ce6994f8-d83a-472f-87fb-57b864653de5/metadata/FGDC-STD-001-1998.xml
Online Linkage https://gstore.unm.edu/apps/rgis/datasets/ce6994f8-d83a-472f-87fb-57b864653de5/metadata/FGDC-STD-001-1998.html
Online Linkage https://gstore.unm.edu/apps/rgis/datasets/ce6994f8-d83a-472f-87fb-57b864653de5/metadata/ISO-19115:2003.xml
Online Linkage https://gstore.unm.edu/apps/rgis/datasets/ce6994f8-d83a-472f-87fb-57b864653de5/metadata/ISO-19115:2003.html
Online Linkage https://gstore.unm.edu/apps/rgis/datasets/ce6994f8-d83a-472f-87fb-57b864653de5/metadata/ISO-19110.xml
Larger Work Citation
Description
Abstract This vector dataset depicts the 1% annual flood boundary (otherwise known as special flood hazard area or 100 year flood boundary) for its specified area. The data set was generated by heads-up-digitizing flood insurance rate maps available from FEMA's Map Service Center. These maps are for informational use only and should not be used for engineering or insurance purposes. Contact your local floodplain administrator for more information.
Purpose This vector file is intended to be used for planning and mitigation purposes. It is not appropriate to use for engineering or insurance purposes.
Time Period of Content
Single Date/Time
Calendar Date 2013-12-13
Currentness Reference publication date
Status
Progress Complete
Maintenance and Update Frequency As Necessary
Spatial Domain
Bounding Coordinates
West Bounding Coordinate -108.000944
East Bounding Coordinate -106.343831
North Bounding Coordinate 33.47823
South Bounding Coordinate 32.605367
Keywords
Theme
Thesaurus none
Keyword special flood hazard area
Keyword SFHA
Keyword 100 Year flood zone
Keyword 1% annual chance flood zone
Keyword flood insurance rate map
Theme
Thesaurus ISO 19115 Topic Categories
Keyword boundaries
Place
Thesaurus Spatial Reference System Identifiers
Keyword EPSG:3857
Place
Thesaurus Country
Keyword U.S.
Place
Thesaurus State
Keyword New Mexico
Place
Thesaurus none
Keyword Sierra
Access Constraints None
Use Constraints None
Point of Contact
Contact Information
Contact Person Primary
Contact Person
Contact Organization
Contact Organization Primary
Contact Organization Earth Data Analysis Center
Contact Person
Contact Position Clearinghouse Manager
Contact Address
Address Type mailing and physical address
Address MSC01 1110
Address 1 University of New Mexico
City Albuquerque
State or Province NM
Postal Code 87131-0001
Country USA
Contact Voice Telephone 505-277-3622 ext. 230
Contact Facsimile Telephone 505-277-3614
Contact Electronic Mail Address clearinghouse@edac.unm.edu
Hours of Service 0800 - 1700 MT, M-F -7 hours GMT
Contact Instructions
Native Data Set Environment Microsoft Windows Vista Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 9.3.1.3000
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Data Quality Information

Attribute Accuracy Report
Report This data set contains no additional attributes other than those added by ESRI during the shapefile creation process.
Quantitative Attribute Accuracy Assessment
Attribute Accuracy Value
Attribute Accuracy Explanation
Horizontal Positional Accuracy Report
Report Data was heads up digitized off of georeferenced and mosaiced FEMA FIRM Maps from the Mapping Service Center. Many of these maps were converted by letter from original HUD maps from the 1960's and 1970's. No positional accuracy should be assumed from this dataset.
Quantitative Horizontal Positional Accuracy Assessment
Horizontal Positional Accuracy Value
Horizontal Positional Accuracy Explanation
Vertical Positional Accuracy Report
Report This dataset contains little to no vertical data.
Quantitative Vertical Positional Accuracy Assessment
Vertical Positional Accuracy Value
Vertical Positional Accuracy Explanation
Logical Consistency Report unknown
Completeness Report Data contained in this shapefile is complete to the best of our knowledge.
Lineage
Source Information
Source Citation
Citation Information
Originator Federal Emergency Management Agency
Publication Date 2011-11-30
Publication Time
Title Flood Insurance Rate Map
Geospatial Data Presentation Form
Publication Information
Publication Place
Publisher
Other Citation Details
Source Scale Denominator
Type of Source Media online
Source Time Period of Content
Source Currentness Reference publication date
Source Citation Abbreviation FIRM
Source Contribution spatial information
Process Step
Process Description Appropriate FIRMs were downloaded from the FEMA Mapping Service Center
Process Date 2013-06-01
Process Time
Process Contact
Process Step
Process Description Individual FIRMs were georeferenced in ERDAS IMAGINE. This process required matching control points on the FIRM maps to the same points on a reference image that that had previously been georeferenced. Control points are usually well mapped features such as drainage and road intersections and Public Land Survey System intersections. The statewide 1:24,000 topographic quad map mosaic was selected as the reference image because both these maps and the FIRM maps had similar features to map. The process consisted of opening two viewers side by side on the monitor and displaying the topo mosaic on one viewer and the same area of the FIRM map in the second viewer. Then a feature such as a drainage intersection was selected on the FIRM map and the line and column coordinates of that feature were placed in a table. Then the same feature was selected from the topo mosaic and the actual map coordinates of the feature were entered into the table next to the FIRM line and column coordinate. Then a second feature was located on both viewers and then a third and so on. The features were selected to have a relatively even distribution over the FIRM map area. When all features had been selected the IMAGINE software generates a transformation matrix which calculates the best fit of the FIRM control points to the topo mosaic points. If the operator is satisfied with the calculated fit the command is then given to resample the FIRM map to match the topo mosaic and generate a new FIRM map image which now has map coordinates.
Process Date 2013-06-15
Process Time
Process Contact
Process Step
Process Description When all of the maps for a county had been georeferenced it was possible to trim off all of the extraneous edge data from the maps and mosaic them together based on the georeferenced information present in each of the maps.
Process Date 2013-08-01
Process Time
Process Contact
Process Step
Process Description Special Flood Hazard Boundaries were heads-up-digitized using ESRI ArcGIS Version 10.1.
Process Date 2013-11-15
Process Time
Process Contact
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Spatial Data Organization Information

Indirect Spatial Reference Method New Mexico
Direct Spatial Reference Method Vector
Point and Vector Object Information
SDTS Terms Description
SDTS Point and Vector Object Type GT-polygon composed of chains
Point and Vector Object Count 38
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Spatial Reference Information

Spatial Reference
Name D WGS 1984
Code EDAC:Unknown
URL http://gstore.unm.edu
Spatial Reference
Name WGS 1984
Code EPSG:4326
URL http://www.epsg-registry.org/export.htm?gml=urn:ogc:def:crs:EPSG::4326
Spatial Reference
Name WGS 1984 Web Mercator Auxiliary Sphere
Code EPSG:Unknown
URL http://gstore.unm.edu/sprefs/EDAC-Unknown
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Entity and Attribute Information

Detailed Description
Entity Type
Entity Type LabelSpecial Flood Hazard Area Boundary
Entity Type Definition Boundaries for Special Flood Hazard Areas
Entity Type Definition Source EDAC
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 Id
Attribute Definition ID field
Attribute Definition Source ESRI
Attribute Domain Values
Unrepresentable Domain ID field
Attribute
Attribute Label Shape_Leng
Attribute Definition length of feature in internal units
Attribute Definition Source ESRI
Attribute Domain Values
Unrepresentable Domain length of feature in internal units
Attribute
Attribute Label Shape_Area
Attribute Definition Area of feature in internal units squared.
Attribute Definition Source Esri
Attribute Domain Values
Unrepresentable Domain Positive real numbers that are automatically generated.
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Distribution Information

Distributor
Resource Description Downloadable Data
Distribution Liability The material on this site is made available as a public service. Maps and data are to be used for reference purposes only and the Earth Data Analysis Center (EDAC), Resource Geographic Information System (RGIS) and The University of New Mexico are not responsible for any inaccuracies herein contained. No responsibility is assumed for damages or other liabilities due to the accuracy, availability, use or misuse of the information herein provided. Unless otherwise indicated in the documentation (metadata) for individual data sets, information on this site is public domain and may be copied without permission; citation of the source is appreciated.
Standard Order Process
Digital Form
Digital Transfer Information
Format Name ZIP
Transfer Size 2
Digital Transfer Option
Online Option
Computer Contact Information
Network Address
Network Resource Name https://gstore.unm.edu/apps/rgis/datasets/ce6994f8-d83a-472f-87fb-57b864653de5/sierraSFHA.original.zip
Access Instructions Download from Resource Geographic Information System (RGIS) at http://rgis.unm.edu.
Fees None. The files are available to download from Resource Geographic Information System (RGIS) (http://rgis.unm.edu).
Ordering Instructions Contact Earth Data Analysis Center at clearinghouse@edac.unm.edu
Custom Order Process Contact Earth Data Analysis Center at clearinghouse@edac.unm.edu
Technical Prerequisites Adequate computer capability is the only technical prerequisite for viewing data in digital form.
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Metadata Reference Information

Metadata Date 2025-05-22
Metadata Review Date
Metadata Future Review Date
Metadata Contact
Contact Information
Contact Person Primary
Contact Person
Contact Organization
Contact Organization Primary
Contact Organization Earth Data Analysis Center
Contact Person
Contact Position Clearinghouse Manager
Contact Address
Address Type mailing and physical address
Address MSC01 1110
Address 1 University of New Mexico
City Albuquerque
State or Province NM
Postal Code 87131-0001
Country USA
Contact Voice Telephone 505-277-3622 ext. 230
Contact Facsimile Telephone 505-277-3614
Contact Electronic Mail Address clearinghouse@edac.unm.edu
Hours of Service 0800 - 1700 MT, M-F -7 hours GMT
Contact Instructions
Metadata Standard Name FGDC Content Standards for Digital Geospatial Metadata
Metadata Standard Version FGDC-STD-001-1998
Metadata Time Convention
Metadata Access Constraints
Metadata Use Constraints
Metadata Security Information
Security Classification System
Security Classification
Security Handling Description
Metadata Extensions
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